Do-it-yourself pendulum cutting saw for metal. Do-it-yourself disk cutting machine for metal. Below are photos of the manufacturing process.

Section: Machine tools and tools

The purpose of our work will be the manufacture of a cutting machine with our own hands. There is no need to describe how useful and necessary such equipment is in the work of any craftsman. and just in business.

We will start manufacturing from a frame-frame, its dimensions 700*1000*900 mm.

A corner of 25 * 25 mm will perfectly serve as a material for the frame, we cut the workpiece with a grinder and weld it. We weld channel No. 10 to the upper plane of the frame at a distance of 70 mm from the edge, to which, in turn, two vertical racks from a square 40 * 40 mm.

The uprights are connected by a #216 12mm shaft with a clad sleeve (to avoid end movement of the disc, the shaft-hub connection is made with a sliding fit with minimal clearance). A rocker arm from the same channel No. 10 with a size of 800 mm is welded to this bushing, and in such a way that the shoulders are related as 1: 3.

An electric motor is mounted on a smaller part of the rocker arm, and a working shaft is mounted on the larger part, the transmission of movement will be carried out using a belt drive.

Now about the electric motor. Preference should be given to asynchronous motors, as more reliable and durable. Practice shows that for normal operation with a cutting disc # 216 400 mm, a "three thousand" with a power of 2.2 kW, powered by a three-phase network, is ideal. A thousand and a half will do, but gear ratio belt drive must be selected so that the shaft is about 6000 rpm. In case of power supply from single-phase network. engine power should be increased by 30% and run and start capacitors should be used.

We order the working shaft with supports, flanges for the disk and a pulley for the “A” type belt to the turner, and the flange protrusion should be # 216 32 mm. In this case, it will be possible to install both a cutting disc and a saw blade for wood on the machine. Both motor and shaft are attached to the shaft with M10 bolts and nuts.

The rocker stroke is limited by the chain, and springs are installed on the engine side to facilitate the return (for example, from a sports expander). Chains and springs are fastened with bolts.

The table is made from a planed board 40-50 mm, and covered with plywood or USB to level out small irregularities.

And further important point . When installing the shaft, install the saw blade and carefully check the perpendicularity of the planes of the blade and table. If necessary, the position of the shaft must be leveled by using shims on the shaft bearing supports.

And finally, the last. DO NOT FORGET to provide disk protection.

The drive is running high speed, abrasive and metal particles can fly out, and in the case of using a saw blade with carbide tips, the latter can fly out. Disk protection is a must!

What is needed for a cutting machine

Watch video Cutting machine for metal.(Homemade cutting machine for metal.)

Download the image (preview) by choosing the quality

Dear friends!

The source of all video content, including that played on the pages of the androidmafia.ru resource, is a third-party video resource, namely the public video hosting YouTube.com, which provides open access to its video content (using the open and public technology video API3 youtube.com)!

Copyright issues

If you own the copyright to this video, which was uploaded without your consent to YouTube.com, please go to this YouTube.com video page. click on the link under the player More - Complain - Violation of my rights and in the drop-down menu, select what exactly is violated and click the Send button. Copyright section on YouTube.com

Inappropriate Content

To report an inappropriate video, go to YouTube, click on the link below the player More - Complain and select in Report abuse what exactly you do not like in this video. Read more about our rules in the Terms of Use.

Go to this video page

Do-it-yourself cutting machine from a grinder - convenience and practicality!

Bulgarian is a very useful and versatile tool. With it, you can cut metal, stone, tiles and, of course, grind surfaces, but sometimes it is much easier and more accurate to perform these works. stationary machine. Fortunately, you can make a cutting machine from a grinder with your own hands!

Homemade grinder machine - pros and cons

If you have to hold an angle grinder in your hands often enough, you probably managed to feel its disadvantages. The weak points of the tool stem from its main advantage - mobility. Firstly, it is not always possible to fix the parts during cutting, and their slightest vibration can lead to the destruction of the abrasive disc, which in turn is fraught with serious injuries.

Secondly, it is rather difficult to control a clear perpendicularity of the cut with a mobile version of the tool, take into account the thickness of the disk in relation to the mark and the material being cut, and even hold it if necessary. Thirdly, it is quite difficult to cut several parts of the same size with a tool, especially when it comes to twigs and small pipes - after cutting, you also have to trim the parts.

And, of course, the employment of both hands and the utmost tedious concentration during work, since the angle grinder is one of the most dangerous tools. What is only worth a kickback - a sudden rejection of the tool when the rotating abrasive disc is jammed in the workpiece. The danger of kickback lies not so much in the rejection of the tool as in the concomitant destruction of the circle. At such high speeds, fragments of abrasive can seriously injure the operator.

Especially often, a kickback occurs at the end of the cut, when only a small jumper connects the parts. In this case, it is recommended to stop the tool without cutting the workpiece to the end, remove the circle and cut the part with reverse side. A cutting machine, which can be constructed with your own hands from fairly affordable materials, is able to solve all of these problems and provide additional security.

Making a cutting machine - an easy option

Find finished machine on the shelves of the store, satisfying at first glance your needs - a fairly simple task. But there is hardly a design that is completely made with all the requirements, because the requirements are different for everyone! In such cases, the owners of the machines are trying to improve or remake them, but they face very serious obstacles - either the manufacturers made the machine from alloys that are very difficult to work with by welding, or they did not take into account the little things that you need specifically - for example, an accurate ruler or a more elastic spring. Remaking someone else's is much more difficult than making your own!

Simplest homemade machine for a small grinder with your own hands, you can do it at a minimum cost and in just a few hours! The finished structure will be a long metal pipe that acts both as a frame and as a handle. Closer to one end, a transverse metal bar with two holes for fastening the grinder is welded.

On the same side, the pipe is attached to one side of a small piece of the corner on the movable shaft, while the corner itself is attached on the other side either to the desktop, or just to the floor in the garage! On the opposite side of the mount, it is important to fix the spring, which will allow the entire structure to return to its original position. That's all - the machine is ready, you just need to properly fix the grinder. Of course, this option is for the most simple jobs, for more accurate and complex procedures, it is necessary to make a more complex design.

Do-it-yourself cutting machine from a grinder - for precise work!

To make a cutting machine you will need the following materials and tools: steel corner, profile pipe, metal sheet for the platform (or a lighter chipboard version), welding machine, channel, drill, shaft, several identical bearings, a small diameter pipe, a spring, as well as a relay and a pedal. Welding, if you think about it, can be replaced with strong bolts - that's what you need a drill for. By the way, this option will allow everything else to disassemble the machine if necessary.

How to make a cutting machine from a grinder with your own hands - step by step diagram

Step 1: Details and Drawing

The manufacture of the machine should begin with cutting parts onto the frame. To prevent damage to expensive material, carefully study the numerous drawings that can be found on the Internet or follow the models on the shelves. In the latter case, draw up a drawing yourself, for this you do not need special skills - the main thing is to present the finished structure and its proportions on paper. Each angle grinder needs its own drawing, because tools from different manufacturers can radically differ - somewhere you can remove the handle, somewhere you will have to come up with a stand for the whole grinder! Plus, under different sizes disk needs a different frame.

Step 2: Frame

The simplest frame consists of two frames on a common axis. The lower frame should be fixed on a platform - metal or chipboard. If the grinder is large, it is better to use metal. The upper frame, to which the grinder is screwed, must rotate vertically relative to the lower one, like a pendulum. A spring is needed to fix the starting position. A mount is welded to the lower frame, which consists of a clamping angle and a movable clamp.

Step 3: Ruler

It is very important to provide measuring details in the machine, thanks to which you can cut workpieces with an accuracy of up to 1 mm. In this case, a movable ruler with a limiter welded to the tube is best suited. After setting the exact size with it and fixing it with an end screw, you can get to work!

Step 4: Electronics

For convenience of work, provide in the design a starting pedal or a button with switching through a low-voltage relay of 12 V. Through it, voltage will be supplied to the angle grinder. With the help of such a simple design, we free our hands, achieve an accurate even cut without the use of a vice, and save time on accurate measurements. This tool will replace the metal cut-off saw, and if necessary, you can always return the angle grinder to its mobile state.

Do-it-yourself machine for a grinder - safety is paramount!

When working with a grinder, stationary or manual, safety must always be remembered. In the case of the stationary version, you need to take into account the direction of the tool and the position of the guard - it is important that the guard completely hides the area in which the operator is located. If you have a machine, you will probably have a desire to use the tool for other purposes - for example, attach a saw blade for wood to the angle grinder, which is absolutely impossible to do!

Wood is a heterogeneous material, it can contain knots or even nails. The rotational speed of the angle grinder significantly exceeds the prescribed speed of a standard sawmill, which will very quickly render the saw blade unusable.

But, in addition to this, unlike abrasive and grinding discs, saw blades have sharp teeth that pose a high danger. Risking your health for a quick cut is simply unwise. After installing the tool and a new disc, the work of the grinder should be checked for at least 1 minute at idle - the circle should rotate completely freely, without excessive vibration, without touching the casing.

Leave the solution for 5-6 hours. Then the foam will separate and rise up, and liquid will remain below. It is necessary to carefully drain this liquid and smear the picture with it in several layers. After each layer, the painting must dry completely. Then you can hang a picture and forget about it for half a year or a year. Then the picture should be washed with water. After that, you can safely cover the picture with varnish.

How to pour sugar into a glass: In order to pour sugar into a glass, you need to take a spoon, scoop it up, bring it to the cup and pour it out! ?

Do-it-yourself cutting machine from a grinder

Milling Machine DIY Drawings

Video how to make a cutting machine for metal from a grinder

Click on Play to watch

If you have to hold an angle grinder in your hands often enough, you probably managed to feel its disadvantages.

The weak points of the tool stem from its main advantage - mobility. Firstly, it is not always possible to fix the parts during cutting, and their slightest vibration can lead to the destruction of the abrasive disc, which in turn is fraught with serious injuries.

Thirdly, it is quite difficult to cut several parts of the same size with a tool.. especially when it comes to twigs and small pipes - after cutting, you also have to trim the details.

And, of course, the employment of both hands and the utmost tedious concentration during work, since the angle grinder is one of the most dangerous tools.

What is only worth a kickback - a sudden rejection of the tool when the rotating abrasive disc is jammed in the workpiece. The danger of kickback lies not so much in the rejection of the tool as in the concomitant destruction of the circle. At such high speeds, fragments of abrasive can seriously injure the operator.

Especially often, a kickback occurs at the end of the cut, when only a small jumper connects the parts.

In this case, it is recommended to stop the tool without cutting the workpiece to the end, remove the wheel and cut the part from the back side. A cutting machine, which can be constructed with your own hands from fairly affordable materials, is able to solve all of these problems and provide additional security.

2 Making a cutting machine - a simple option

Cutting machine from grinder

Having worked a lot as a grinder, I came to the conclusion that it is possible to operate this useful tool more efficiently.

And here's what I came up with.

■ It is difficult to cut multiple parts of the same length from small pipes, rods, etc.

It takes extra time to trim, and each time you have to set a new mark.

■ It is necessary to constantly control the perpendicularity of the cut, take into account the thickness of the disk in relation to the tube and the mark, so that there is no error.

■ Vibration of the workpiece during cutting leads to the destruction of the disc in a matter of seconds.

By transferring a hand tool to the category of a stationary one, I eliminated the listed shortcomings.

The machine consists of two frames on a common axis (photo 1, 2).

The lower one was rigidly fixed on a chipboard plate (Fig. 1).

403 Forbidden

The upper one, with a bolted grinder B, rotates vertically, like a pendulum, relative to the lower (Fig. 2). The initial position of the tool is fixed by a tension spring.

To lower the cutting disc, I press the handle of the grinder down. When released, the cutting part returns.

A collapsible attachment unit is welded to the lower frame, consisting of a movable clamp and a pressure bracket (photo 3).

Below is a movable measuring ruler with a limiter welded to the tube.

Having locked the bar with an end screw, I only set the size once (with an accuracy of 1 mm), after which I cut the required number of absolutely identical parts of any size - up to the rings.

I start the machine with a switching pedal through a low-voltage relay (12 V), which, with its powerful contacts, supplies 220 V to B. Accordingly, neither the pedal nor the wire on the ground, even if the insulation is damaged, poses a danger to humans.

I install, remove and fix B with the help of a clamp that is used on top covers boxes for storage and transportation of equipment (type of lining). The weight and dimensions of the machine allow it to be transported in a car box.

Advantages of development

■ No vice required

■ Gets a very even cut

■ Pedal frees hands

DIY cutting machine

I plan to cook the frame of the stairs to the second floor and for maximum accuracy of cuts at an angle, a cutting machine is needed.

I began to look closely at them, but for some reason the prices are not very childish, and in the economy in the future it will have little use. At the insistence of the respondents, the option with the installation cutting wheel for metal in miter saw on wood, was discarded.

I decided to pay attention to the fixtures for grinders.

Watched different variants, the price is from 300 to 600 thousand, but in all I did not like the longitudinal play.

Because of this backlash, there can be a run-up in the angle of up to 5 degrees. Nah such happiness? After some thought, I decided to pile myself such an adapter on my own. It's a pity to throw 300 thousand on him.

What I needed:

* grinder

* welding machine

* clamps

From materials, used iron was used, 3 bolts f 16 were bought for fastening the grinder and friends prompted the carriage from the bicycle.

As a result, personal time was spent - it is priceless

4800 for three bolts from speculators

10,000 for cutting wheels

Well, with a dozen electrodes and a couple of kilowatts of electricity.

After the wallpaper has been glued: After wallpapering the walls in the room, do not leave the room to ventilate, as the pasted wallpaper will begin to fall off or become covered.

Keeping nails close at hand: Sometimes we put nails or screws in our mouths, in our pockets, or simply in our hands. It is much better to hang a magnet around your neck. On it, they will be securely held in any quantity and hands and mouth will be free

Homemade vulcanizer - manufacturing and application

If you have a punctured tire, the easiest option is to go to a tire shop. However, there are many who like to do everything themselves, and tire fitting is not always nearby. Sometimes the costs associated with contacting a tire service (road, time, the procedure itself) result in a substantial amount, especially if you have to use this service often.

In general, for various reasons, for those who wish to repair damage at home, I offer several options making a homemade vulcanizer with minimal cost. With the help of a home-made vulcanizer, for example, made from an iron, you can quickly and reliably repair cars, motorcycles and bicycle chambers, air mattress, heating pads, various apiaries, inflatable toys, etc.

One of the most common options for a homemade vulcanizer is the option using an old iron.

The reason for this is the new, more functional irons, and the old (Soviet) irons, in working order (if you don’t have any left) can be easily found with a neighbor. Here is a free basic part of the vulcanizer for you.

Below are a few designs. Which one to choose is up to you, the basic idea is the same, the difference is how to provide a clamp connection at the place of vulcanization of a rubber product.

Raw rubber is soaked (for a while) in gasoline, the size is slightly less than the size of a patch.

The puncture site is treated with sandpaper (size - with a margin), wiped with gasoline. A patch is cut out of auto-chamber rubber, the edges are rounded. The patch is also processed with sandpaper, then with gasoline. Next: raw rubber on the hole, a patch on it, we clamp everything in our vulcanizer. You can put a piece of newspaper underneath to keep the rubber from sticking to the vulcanizer plate.

Wait for the water to boil when it hits the vulcanizer (15-20 minutes). Turn off the vulcanizer, wait a bit, remove the vulcanizer, let the rubber cool. They also check the temperature with the help of granulated sugar: if its grains in contact with the hot vulcanizer begin to melt and turn yellow, then it’s time to turn off the vulcanizer.

If your thermostat works, set it to 150 degrees. (approximately for ironing silk). The thermostat can be adjusted experimentally. If there is a smell of burnt rubber, this is a sign high temperature if the patch is poorly fused (vulcanized) - a sign of insufficient temperature or short vulcanization time.

After one or two times everything becomes clear and vulcanization can be put on stream 🙂

For more specific work, you will need a simple mold, which is made from two steel plates 6-8 mm thick and 40X60 mm in size. Four holes are drilled in the corners and an M4 thread is cut to tighten the halves with screws.

The inner edges of the plates are slightly ground down so that the edges do not cut into the rubber. In the case of a complex configuration of the parts to be repaired, the plates are given an appropriate shape or additional holes and grooves are made.

Before starting work, the treated area is carefully cleaned (the edges of the apiaries are cut at an angle of 45 °) and degreased with light gasoline (B-70).

Then, a patch of the required size from raw rubber is applied to the repaired place, put into the mold and tightly tightened with screws. Putting on a heated iron in such a way that the entire plane of the lower half of the mold touches the heating surface, give an exposure of 10-15 minutes.

During operation, make sure that the rubber does not touch the hot parts of the iron.
Grooves for gluing the belts are drilled with the mold halves tightened, and the diameter of the drill should be equal to the diameter of the belt. It is possible to drill several holes in one mold, for different diameters of the apiaries, however, the distance between them must be no less than the thickness of the workpiece.

Otherwise, the heating of the gluing site will be uneven and the quality of vulcanization will deteriorate.
Cleaning the gluing places or trimming the ends of the apiary is done immediately before work, and the raw rubber is applied in a thin layer - so the connection will be stronger.

Scheme of a vulcanizer with an integrated clamp

Vulcanizer iron: 1 - clamp bracket, 2 - boss, 3 - clamping screw, 4 - clamping heel, 5 - electric iron.

Cut a bracket out of five millimeter steel (see fig.

figure), weld a cylindrical boss to it from above, and on the inside - a strip of metal 50 mm wide. The cross section of the resulting clamp should have T-shape. Drill a hole along the axis of the boss and cut a thread in it for the clamping screw. Then bolt the body of the iron to the bottom of the Clamp - and the vulcanizer is almost ready.

The easiest option vulcanization with an iron- no modifications at all.

Raw rubber is applied to the cleaned place of the gap, then paper and everything is pressed on top with an iron.

Some weight is placed on the iron. Vulcanization lasts 10-15 minutes, the temperature of the iron is 140-150 ° C (the thermostat is in the “silk” position). Since the exact temperature of the iron is unknown, care must be taken not to burn the rubber.

The smell of burnt rubber indicates too much heat.

Another option homemade vulcanizer from electric stove and clamp

According to the dimensions (diameter and height) of the ceramic base from a household electric stove with an open spiral, a welded heater body is made of iron with a thickness of 5 mm.

Four legs of a bar and a clamp are welded to its walls. Insert a ceramic element with a spiral into the body, on which, to prevent its contact with the metal, it is necessary to put a gasket made of asbestos sheet.

From below the electric heater with the help of two bolts is closed with an iron cover.

The main details of a homemade vulcanizer:
1 - body; 2 - bottom cover; 3 - asbestos gasket; 4 - ceramic base with nichrome spiral; 5 - power cord.

On the upper surface of the housing, near the clamp, a bimetallic thermostat is mounted from a conventional iron, complete with a signal lamp and its resistance.

The electrical circuit of the vulcanizer is similar to that of an iron. By controlling the temperature of the surface of the plate made by the vulcanizer with a mercury or other thermometer, the regulator is adjusted so that it turns off the heating element at a temperature of about 140-150°C.

Do-it-yourself cutting machine for metal

At the same time, the signal light goes out, which indicates that the vulcanizer is turned off. The heating time depends on the power of the heating coil.

And the last option is a camping one that does not require electricity, which can be very useful in case of trouble along the way.

This homemade vulcanizer made using a piston from a motorcycle or car engine, for the use of which only 40-50 grams of gasoline are needed.

The vulcanizer is easy to manufacture, it includes only a few parts:
1 - the base of the vulcanizer
2 - bolts
3 - beam
4 - piston
5 - self-tapping screws
6 - nuts
7 - holes for self-tapping screws
8 - bolt holes

The base 1 is made of wood, as the wood does not interfere with good heating of the rubber.

Bolts 2 are inserted into the holes of the base and fixed to the base with the help of self-tapping screws 5, from turning in the base hole. . The bolts are made of a metal rod with a diameter of 12mm. A washer is welded on one end of the rod, and an M12 thread is cut on the other.

A beam is put on both bolts from the side of the thread, which, with the help of nuts, presses the vulcanizer piston to the base.
A damaged chamber is placed between the base and the piston.

Materials and design can be changed - only the principle of operation is important.

To repair the camera, you need to find damage, clean it, and wipe it with clean gasoline. Then install a patch of raw rubber on the damaged place and cover with a piece of newspaper, and put the piston on top. We press the piston with the help of a rail with nuts. Pour gasoline into the piston and release a small piece of rag into the gasoline.

We set fire to gasoline and after all the gasoline has burned down, we give time for the piston to cool completely. Only after that we remove the piston.

Repair of the damaged camera is completed. The patch looks like after a conventional vulcanizer - reliable and durable, does not require re-repair.

If you are interested in making a homemade winch

Repair yourself and as they say "not a nail ..."

Do-it-yourself metalworking machines

For each company (factories, factories) the most important is air supply, as well as water cooling, which is necessary in every technological process. For this purpose, special systems with fans are used.

DIY metal cutting machine

Various pumps and fans are do-it-yourself metalworking machines to stabilize the temperature process in production. Special machines control electricity consumption and absorb the effect of noise.

We use scales for every food trading company. Modern scales are automatic device, which accurately measures the weight of the item. The device is equipped with a display and a special keyboard, which allows you to set service rates gas equipment 2016 and display the necessary information for the seller and the buyer.

You can control the leveling from the power supply or charge it from the battery (portable version).

In any office or company they support optimal temperature air and air exchange with special devices. This is necessary to organize a convenient workflow. Among various devices we use equipment for mini-smokers: covers, air conditioners of various modifications, ventilation shafts with natural and artificial cooling.

Ventilation can be exhaust, inlet and mechanical.

Important: do-it-yourself metalworking machines

In addition, test equipment and running machines for turning 1K62 Wales, phoenix design, lathe cutting - lathe cutting, damping speed for refrigeration equipment, brick making equipment, hypertension, shoe making, equipment price, tape on CSF 172 machine, machine rabbit skin, how to weave animatronics from rubber belts to monstrous machine.

For companies involved in food production, various machines are used that provide an automated workflow.

The automation setting can be defined using some functions in the t-razor for Chelyabinsk. These are different groups of machines that differ depending on the functions performed. All technological operations can be classified in accordance with the principle of the work performed, the device and modes of implementation.

Companies producing semi-finished products for sale in grocery supermarkets are equipped with special refrigerators.

Freezers are the purchase of a 2c132 device that keeps the final product for a fixed period of time. In frozen appliances, ready-made semi-finished products are equipped with a special conveyor belt equipped with a spiral belt.

Do-it-yourself pendulum saw for metal

How is a homemade circular saw made?

Circular homemade saw
Pendulum circular saw with a powerful electric motor
Mini circular saw
- Making the foundation
- Engine installation

A homemade mini circular saw will perfectly solve the issue of savings.

Because not every home master, in order to make a small repair, can afford to purchase it. But sometimes you can't do without such a tool. A homemade circular saw that turns out can perfectly cope with the task associated with small construction, for example, in the country.

In order to make repairs at home or in the country, you need a circular saw, and you can do it yourself.

Circular homemade saw

A circular homemade saw is designed to saw logs.

The thickness of the logs that this equipment can cut depends on the power of the electric drive.

Assembly diagram of a circular saw.

If it is necessary to cut thick blocks of wood, a shaft, a belt drive and the most powerful engine are placed on these saws.

Any do-it-yourself circular saw made consists of a lower and an upper part.

Electrical equipment is installed at the bottom:

transformer
engine
starting device.

Attached to the top:

The frame of the upper part of the saw is best made from a 25 mm metal corner.

The approximate dimensions of the rectangle in the form of which the upper part is presented are 600x400 mm. Pipes are welded in its corners (recommended height #8211 is 2.2 m, and diameter #8211 is 17 mm).

Additionally, 2 corners are fixed along the frame and to strengthen the bearings. The distance between them is determined by the size of the shaft.

Well, another cutting machine 🙂

Clamps are used to secure the bearings. Chips will not get stuck between rings, balls and cage when sealed bearings are supplied.

A thread must be made at the end of the shaft so that the disk is clamped.

Scheme of the bearing assembly of a circular saw.

The lower part is best made massive so that the circular saw is stable. For the manufacture of the frame for this part, a 40 mm corner is used. To fix the engine, it is necessary to additionally strengthen 2 corners across the frame. An asynchronous three-phase motor with a power of 1.5 kW and 1500 rpm is the best option for a DIY circular saw.

Pulley Creek has inner size 80 mm, it is mounted on the shaft. There is also a need to weld a small platform in order to fix the launcher on it.

Pipes having a length of 2.2 m, welded to the corners of the frame, are needed to tension the belt so that the metal lambs press the thin pipes.

After that, the lower and upper parts of the hand-held circular saw are embedded in the supports, the role of which is played by pipes, then the belt is tightened and tightened with lambs. Starting an asynchronous motor in this model homemade saw carried out through the starting capacitors.

To additionally load the engine and increase the torque, it is possible to use a 220/36 400 W transformer, the connection of which is made according to an autotransformer circuit. The location of the capacitor and transformer does not really matter in the operation of the circuit.

Pendulum circular saw with a powerful electric motor

Scheme of a table for a circular saw with a lifting-lowering mechanism.

Mini circular saw

With this indispensable tool for home construction, you can cut any material and at any desired angle.

This means doing all the work associated with the rotating saw blade. Now let's look at how a mini circular saw is made with your own hands.

Making the foundation

It is very important to achieve perfect parallelism of the inner edges of the plate. Fastening the tool from below to the table will be carried out so that the circular saw is between the sheets of the tabletop in the middle of the gap. A mini circular saw is attached to the drilled holes on the table in this position.

Cutting a profile, pipe or any other workpiece strictly perpendicular to the axis and cleanly with a hand tool is not an easy task, but using an electric pendulum saw is mere trifles.

The device consists of a base frame and a sheet of metal (or a sheet of durable plastic), pivotally connected by an axis on one side.

On the frame with the side opposite the axis, a corner is welded parallel to it, in which pipes or profiles are laid for cutting.

An electric motor and a shaft connected by a drive belt are fixed on the top sheet. Don't forget to attach a handy handle.

At the opposite end of the shaft from the pulley, a clamp is made for attaching a cutting wheel or circular saw.

Such a pendulum saw can cut almost everything: metal, plastic, wood (even logs). When sawing logs, the lower frame rotates around the hinge axis by 180 ′.

In this position, it is fixed with something, for example, an assistant can stand on it. In order not to move a heavy log after each saw, it is easier to carry the saw along it.

Blanks can be cut at different angles. To do this, the corner on which the workpiece is placed must be fixed to the base frame not by welding, but by bolts and provide for the possibility of installing it at different angles to the saw blade.

Details of the saw blade shaft assembly

1-shaft, 2-bearing bracket, 3-saw blade bushing clamps, 4-pulley.

DIY pendulum saw

It is useful to replenish the arsenal of metal-cutting machines of a home workshop with a pendulum saw.

You can fix it on a workbench, next to the bench vise, in which the workpiece is clamped. The working tool of the saw is an abrasive disk. Steel bars, angles, pipes, sheets, and even metlakh tiles, porcelain and glass, hardened to any hardness, are tough for him, and the cut surface is quite clear. If you replace the blade with a saw with a fine tooth, then you can cut wood, plywood or plastic, while a diamond blade will make it possible to process stones.

To secure the workpiece, it is convenient to use a rotary vice, in this case, cutting can be done at an angle, which is very convenient when preparing parts for welding.

Various attachments to the saw allow you to make shallow cuts and grooves, and even turn it into a regular circular saw.

For such a saw, you will need a single-phase electric motor with a power of 340 W (from an electric grinder) or a three-phase AOL 21-2 type with a power of 400 W with a rotation speed of 2800 rpm.

Transfer of rotation to the spindle of the machine - V-belt type A-I018 from the GAZ-24 car.

Rice. 1 Pendulum saw: 1 - electric motor, 2 - support, 3 - protective casing of the tool, 4 - tool (abrasive disc), 5 - protective casing of the belt, 6 - V-belt A-1018, 7 - screw M8X14 mm, 8 - drive pulley (D 16) , 9 - belt cover (steel), 1C - driven pulley (D 16), 11 - spacer (steel), 12 - washer (steel), 13 - pendulum feed handle, 14 - M6X12 mm bolt, 15 - M5 screw X10 mm, 16 - shaft (steel), 17 - cover (D 16), 18 - cover (D 16), 19 - sleeve (steel), 20 - washer (steel), 21 - nut (steel), 22 - ball bearing No. 203.

23 - body (steel), 24 - boss (steel), 25 - M6X8 mm screw. 26 - M8 X 16 mm screw, 27 - boss (steel), 28 - frame (steel), 20 - M6X16 mm bolt, 30 - 1/2 "pipe (steel), 31 - axle (steel), 32 - bushing ( steel), 33 - washer, 34 - M10 nut, 35 - plate (steel), 36 - intermediate housing (D 16).

The basis of the saw is a spinal frame of square section, to which the spindle body is welded on one side, and on the other - a plate for installing the engine. A 1/2" pipe is passed through the groove in the frame - it is the body of the swing axis of the saw.

Fulfilling welding work, make sure that the axis of the motor shaft, the spindle shaft and the swing axis of the saw are strictly parallel. After welding, be sure to straighten the frame, clean the welds and paint with nitro enamel with a preliminary primer.

Belt guard and abrasive disc guard made of 2 mm thick sheet steel.

It is best to weld blanks from the inside with a fillet weld. The belt guard is bolted directly to the motor and frame, to which the abrasive disc guard is also screwed.

The drive handle is located on the removable cover of the belt cover.

Stuff the spindle bearings with CIATIM-221 grease before assembly.

Insert felt rings impregnated with liquid lubricant into the grooves of the bearings.

At the assembled saw, the engine must outweigh the spindle and be at the bottom, between the supports, otherwise, when the saw is turned on, the abrasive may hit the workpiece and crumble.

Rice. 2 Pendulum saw attachments:A - for cutting grooves: 1 - belt drive housing, 2 - bracket, 3 - work table fixed in a vise

B - for cutting sheet material: 1 - belt drive casing, 2 - folding table, 3 - hinge, 4, 5 - brackets.

Cases for bolts and nails: For convenient storage of bolts, nails, screws, etc.

It is very convenient to use jars with screw-on lids. Nail the lids to the bottom wall cabinet and screw the jars with the contents into the bottom. Now every little thing will be in its place.

Fleas in cats and dogs. An excellent way to fight.: A cat, dog or other animal can be freed from fleas by bathing it in a decoction of tobacco. After that, wash with warm water.

For a long time I wanted to build myself a workshop abrasive - metal cutting machine. Cutting metal with a grinder is not always convenient. The angle grinder does an excellent job with cutting sheet steel, but cut off the corner evenly and profile pipes the grinder turns out for a long time and is not always convenient. It is necessary to make markings on all sides and cut off the workpiece on one side. Cutting is done on the ground in a bent position of the body, holding the workpiece with the foot. The back gets tired and sparks fly in all directions. And it is even more difficult and longer to cut a round pipe evenly. It is more convenient to do this cutting machine for metal when there is no need to bend down, and the workpiece is securely and securely fixed in the machine. It is very convenient to make or on such a machine. The machine was made from "what was at hand." I tell and show you what I did, and you make your own corrections and make the machine even better from “what is at hand” with you. I do not consider it expedient to describe in detail the entire manufacturing process, I will only focus on important (in my opinion) points.

The manufacturing process must be carried out in the following order:

Making a shaft on which the cutting disc and drive pulley will be installed. Assembling the entire assembly and installing it on a pendulum (I call the pendulum the upper, movable part of the machine on which the cutting disc and engine are installed).
Engine installation. Connecting the motor to the cutting disc shaft with a drive belt.
Manufacturing protective covers for cutting disc and drive belt.
Manufacture of the pendulum shaft
Manufacturing of a machine frame with a device for clamping the workpiece, a spark arrester, preparation for the installation of electricians ...
Installing the pendulum on the frame.
Wiring.
Test run. Adjustment and debugging.

I made the machine in a different sequence and faced constant alterations and adjustments, because of which the process dragged on. If I now decided to make a machine, I would do everything in this order.

Before I started making a cutting machine, I studied the experience of other people, from which I realized that:

the motor must be installed at least 3 kW. if the cutting disc is 400 mm.
disk revolutions must be at least 3000 per minute.
on the shaft, it is more convenient to place the disc on the right, and the drive pulleys on the left, this will not allow the nut of the cutting disc to turn away during operation.
cutting disc shaft bearings fit both 205 and 204 (I used 205)

I installed a 3-phase engine, as I have 380V in the workshop. If you have a voltage of 220 V. in this case, you will have to install starting capacitors, there is a lot of information on how to do this on the Internet.

Below are photos of the manufacturing process.

The protective cover lifts up to replace the used disc with a new one. To do this, unscrew only one M8 bolt from above.

The ability to adjust the tilt of the rocker with the help of metal plates. I did not install bearings on this shaft, but simply drilled holes for lubrication on top and drowned them with M6 bolts.

I borrowed the clamping vise from an old factory-made cut-off machine, but I had to remake it a bit. With this vise, the clamping screw nut can be split into two halves, which is very convenient when installing and removing the workpiece.

You can not do the return mechanism, just change the alignment of the rocker shaft.

Spark arrester. 97 percent of all sparks fall into a removable container.
By means of a stop bolt (from below) it is possible to regulate the maximum angle of inclination.

How to calculate the required pulley diameter.

We will proceed from the fact that the cutting disc should rotate at a speed of 3000 rpm. The disks are marked with information about the maximum allowable rotation speed of 4400 rpm. So you yourself decide at what speed your disk will rotate, the main thing is that it should not exceed 4400 rpm.

To calculate the pulley diameters, you need to know:

engine speed
revolutions of the cutting disc shaft

Calculation example:

Our engine rotates at a speed 1500 rpm

The cutting disc must rotate at a speed 3000 rpm

We have a pulley for a cutting disc shaft with a diameter 65 mm.

What should be the shaft on the engine?

we consider the length of the perimeter of the existing shaft: number Pi (3.14) multiply by the diameter. 3.14 x 65mm = 204.1mm (shaft perimeter length).
multiply the resulting number by desired speed shaft: 204.1 mm x 3000 rpm = 612,300 mm/min.
we divide what happened by the engine speed: 612 300 mm/min / 1500 rpm = 408.2 mm (motor pulley perimeter)
Divide the result by Pi: 408.2mm / 3.14 = 130mm we need a pulley of this size in order to spin the cut-off shaft at a speed of 3000 rpm.

Do you have other pulley diameters available?
you only have the right pulley for the engine and you need to match the pulley to the cut-off wheel shaft
You don't have pulleys yet and you plan to buy or make them.

How to calculate the length of the drive belt?

The calculation will require the following data:

drive pulley radius
driven pulley radius
distance between the centers of the pulleys.

Calculation example.

We have two pulleys with a diameter 65mm And 130mm, respectively, their radii 32.5mm And 65mm. The distance between their centers is variable (in order to tension the drive belt), for an example of calculation, let's take the length between the centers 500mm.

We consider half the circumference of each pulley in millimeters and add to the resulting number two distances from their centers (as the belt runs from one pulley to another and back to the first).

32.5mm x 3.14 (pi) = 102.05mm (half circumference of the first pulley)

65mm x 3.14 = 204.1mm (circumference of the second pulley)

102.05 + 204.1 + 500 + 500 = 1306 mm (required drive belt length).

For a more accurate calculation, you need to takeminimum And maximum the length of the distance between the centers, choose something in the middle that suits you.

A pendulum saw for metal, in fact, is a cutting machine, the tasks of which include: cutting pipes, profiles, metal corners, at various angles. The machine is a rigidly fixed frame, with a pendulum mechanism that allows you to cut exactly to size and the intended angle. Mainly in the market the Makita tool is presented, which guarantees high quality and efficiency, but there are also products from lesser known manufacturers.

Device

pendulum feed mechanism cutting tool involves a working movement from top to bottom, by means of a mechanical or manual control. One of the advantages pendulum machine is also a change in the angle of cut, up to 45 degrees from the normal. The working body of the machine is a circular saw, depending on the type, the machine can be single- and double-headed, depending on the number of cut-off saws.

The circular saw located on the pendulum mechanism can be set in motion both manually, by the worker, and automatically.

The machine is often set graduated dials, for additional control of the cutting accuracy, for example, the Makita LC1230 machine, in this case the cutting angle is changed by turning the handle.

Advantages and disadvantages

When fully equipped, the pendulum saw is absolutely safe and comfortable to use. The dust collector collects abrasive elements and metal particles. The clamp for fixing the workpiece holds the part being sawn off and prevents the blade from skewing.

Advantages of pendulum cutting machines:

Disadvantages: the only disadvantage of this kind of machine is their high cost in professional execution. Yes, pendulum saw Makita costs from 10 thousand rubles. But at the same time, Makita tools are most appreciated by our industrialists. Makita produces power tools and accessories, the same saw blade, high quality and different prices, from household models, to highly professional equipment.

Mounting saws

A special subtype of cutting pendulum machines is distinguished by a simplified device and increased mobility. Mounting machines do not have a mechanism for turning the saw itself and cut the workpiece only along the normal.

The device in this case simplified as much as possible, saw, pendulum, frame. Discs for cutting metal, as a rule, are abrasive, less often carbide is used.

The drive to the disk, for professional cutting machines, is usually belt driven, this allows you to reduce the load on the engine, to avoid sharp jerks.

Due to the lack of hard fixing the pendulum and the workpiece, when working with cutting assembly machines, the following nuances must be taken into account:

Use a clamp to hold the workpiece while cutting.
At the moment of starting, the torque of the disc gives a strong push to the saw, consider this.
When cutting with a mounting machine, a burr forms on the workpiece, which must subsequently be removed.

Making a pendulum machine with your own hands

To do this, it is enough to make a frame from a channel and a corner; as a working tool, you can use the usual circular saw, fixing it on the frame.

Cutting the bed, it is quite simple to make, install two channels - paws, connecting them in pairs. Weld the base of the pendulum to them. Often, a whole is used as the basis metal plate 12 mm thick, in which case the hole for the saw blade is simply cut or drilled. You need a drilling machine.

After that, it is necessary to make clips for bearings for the pendulum, for this it is best to contact the turning shop. After turning, welding is also required.

Also during the creation of parts rotary machine and a pendulum you will need milling machine and drilling.

Do not forget about casings, for their manufacture it is best to use sheet metal 0.8–1 mm thick. Cutting is done according to ready-made patterns, after which it is tacked by spot welding.

In the course of processing and harvesting, the following were used:

Gas cutting torch, cutting of base metal, pendulum blanks and bed.
Screw-cutting lathe, for turning fingers and clips.
Milling machine, for processing the edges of workpieces and milling part of the details of the pendulum.
Drilling machine.
welding transformer.

In general, it turns out that the price self-manufacturing the bed for the pendulum saw is large, it will take the strength of an entire mechanical repair shop. In some cases, it's worth it, sometimes not. The price is too high.

Sometimes it's easier and more efficient to buy already finished tool. This will save time and money.

Cutting tool

The saw uses as a cutting tool circular saws, abrasive wheels different diameters and seats. In this case, it is necessary See your saw manual for recommended blade settings. So, the Makita LC1230 saw uses a 12-inch disc for cutting, with an inch fit, 25.4 mm and a number of teeth - 60 pieces. It can be a Makita saw blade, 305x25.4x60, for example, Makita B-29393. Discs from other manufacturers can also be used, according to the specifications. Cutting is usually done with carbide-tipped blades at the ends of the blade's teeth.

Exploitation

Before using the machine must be installed on an elevated table or workbench, this is necessary for the comfort of its use. It is also necessary to free up space for cutting, traying material and storing workpieces.

The Makita LC1230 saw is compact and requires small area, but do not forget about the movement of material and workpieces, as a result, the working area of \u200b\u200bthe cut-off saw is a rectangle of 2x4 meters. With a material length of 2-3 meters.

Cutting with a pendulum saw is not difficult, but nevertheless requires care and accuracy. Yes, a special danger represent sparks and hot metal particles flying from under the saw. Partially, a collar mounted on the saw body saves them. But nevertheless, one should not forget about personal protective equipment.

For cutting metal, in our time, there is a huge variety of various tools. Many of them are manual and have a large number of inconveniences. The rest of the toolkit is considered automated and has large dimensions, or a large price category.

To combine business with pleasure, as well as convenience and price category, needlework masters created a disc cutting machine. Below we will consider everything related to this equipment.

The scope of this machine equipment extends to industrial applications and domestic use. Used for cutting different kind metal (steel, cast iron, copper, aluminum, etc.).

Since in everyday life there are a huge number of different metal objects that require minor repairs, this machine becomes extremely necessary. After all, once lowering the cutter stand with the cutting disc will be easier and faster than manually sawing with a hacksaw.

The overall characteristics of home-made equipment make it possible to place it under a canopy in the summer, and in winter it can be safely placed in a warm garage or in a workshop.

Tip: It is extremely important to choose a smooth and stable place to install the bed ( concrete slab, thick corners, or concreted support legs bed). This is done in order to reduce the possibility of vibration to a minimum during operation.

In production, automated systems are mainly used, which are controlled by the operator through the CNC. The goal is the mass production of metal products, in the form of cutting pipes of given sizes and various sections, flat metal products and much more.

Below we will analyze by what criteria these machine tools are distinguished.

Classification of cutting machines

All cutting machines are distinguished by a huge number of criteria. We will analyze the most important ones. So, the main technological criteria:

By type of tool

Separation occurs directly on the tool that cuts metal products. In turn, they are divided into the following subspecies:

Band saws

In this case, it is used band-saw with teeth. The belt is made from high quality high speed steel. Due to the fact that the cutting belt is thin, material consumption is saved due to the thin cut. Apply tape machines in productions.

Hacksaw

Used in small industries, as well as in everyday life. A hacksaw tool can be manual (everyone knows a hacksaw for metal) and an electromechanical machine tool. In this case, the hacksaw blade is made of various metals (high speed steel, carbon steel, alloy steel, bimetal steel). This type is quite easy to operate and is considered a handy tool.

Disc machines

Belong to the category indispensable tools. Used throughout the metalworking industry. On such equipment, it is possible to carry out high-quality cutting of metal even to an unskilled person. In addition to industry, this machine equipment is widely used in everyday life.

By number of cutting edges

Single head

The design contains one cutting disc. This type of machine is inefficient in its kind and is capable of performing only one operation.

Two-head

In their design, two "heads" are used for mounting disks. In this case, one "head" is in a firmly fixed and motionless state. The second has the ability to move independently in the first. This equipment is considered a high performance tool.

By saw blade feed type

Front feed of the saw blade

The center of the disk moves in a horizontal plane.

bottom feed

The center of the disk moves from bottom to top in a vertical plane.

pendulum feed

The center of the cutting disc moves like an arc, from top to bottom.

Vertical feed

The center of the disk moves in a horizontal plane from top to bottom.

By main view

Cut-off saws

With the help of this tool, a cut of dimensional parts of rolled metal is made. Good for small batch production.

Abrasive - cutting

When working with such equipment, abrasive wheels are used. High-quality cutting of the remains (burrs) of rolled metal is carried out. Cutting the material into blanks, cutting profile metal at the required angle from 0 to 45 degrees.

Correct-cutting

Such equipment carries out the processing of metal produced and supplied on coils (reinforcing steel, metal strip, wire, bars with a profile section). This equipment is equipped with a correct mechanism and automatic unwinding of metal from a reel. The twisted wire enters this mechanism, straightens out over the entire plane and is fed into a special receiver for further processing.

Tip: Depending on the material to be cut, it is necessary to select suitable cutting discs. Discs must match specifications.

Disc machine device

Frame

Or metal structure, which plays the role of the base of the aggregate.

pendulum knot

This is a kind of metal part from a metal profile, which looks like the letter "T". The movable side is mounted on a bracket located on the frame. The movement of the pendulum is carried out by means of bearings, and the return to its original position is carried out by a flexible part (strong tourniquet, or a small spring).

Pipe clamp

The so-called vice, fixed on the bed. They allow you to press the workpiece to give it a stationary position.

Pendulum axis

This axis is used to move the disk.

Electrical engine

The heart of the unit. It is he who drives the whole mechanism. For this equipment, an asynchronous motor is used.

Actuator

A box with electronics that is connected to the electrical network. This box has buttons to turn it on and off.

Wheel guard

Steel protection, which prevents splinters from the disk from falling directly into the person working on the unit.

Belt guard

It is located where the belt makes its movement. This casing is designed to protect against getting into a working person belt, when it breaks.

pendulum handle

The part with which the cutting disc is pressed against the workpiece.

Ground bolt

As in all machines, there is a bolt on the body of the unit, with the help of which grounding is carried out.

abrasive wheel

Directly cutting disc, consisting of various materials.

Sling shackles

(4 units)

bed

This is the area where the main unit of the unit is located.

Adjustable stop

Due to it, the desired size of the future product is fixed.

Tip: If your budget is rather modest, then you can use improvised materials to create parts of the unit. If the budget allows, then it is advisable to purchase all the components in the store. This will improve performance and service life.

Production of a disc cutting machine

Any invention will require certain parts, whether they are purchased items or homemade parts. To create a cut off brainchild, you will need the following:

Metal corner with dimensions No. 24.
Metal channel No. 10.
Movable shaft.
Tubes for the manufacture of the handle.
Welding machine.
Bearings for the pendulum mechanism.
The drive is electric.
Box for the location of electronics.
Toggle switch on and off.
Starting circuit.
Winding.
Electric drill.
Fasteners (bolts, screws).

Let's analyze the assembly process of all equipment:

First of all, the grinder cuts blanks into a frame with dimensions of 400x600x1200 mm.
By welding, the frame is assembled from prepared parts.
A channel is welded over the entire frame. It will give additional strength to the machine and will serve as a guide.
Several vertical supports are screwed onto the channel.
Next, the next frame is mounted, on which the engine and shaft will be located. The dimensions of the frame should be 400x600 mm.
A plate designed for the engine is attached to the frame. The best electric motor for these purposes is an asynchronous motor. Its power should be from 1.5 to 3 kW. After installing the engine, it is necessary to connect it to a three-phase network.
Shaft, flanges, bearings with a pulley are made on a lathe.
Next, the bearings and pulley are installed.
The installation of the box in which the circuit is located is carried out at the bottom of the frame.
A shaft with a bushing is inserted between the vertical supports. Shaft diameter 12 mm. The clearance between the bushing and the shaft must be kept to a minimum.
On both sides of the sleeve, limiters from pieces of the channel are welded.
An electric motor and a cutting mechanism are installed on a long support beam and on pieces of a channel.
The final step is to install the belt that ties the shaft to the motor.

Based on the above assembly steps, we can conclude that it will be much cheaper to assemble such a unit with your own hands. Moreover, during the assembly process, you yourself regulate the entire mechanism, as they say for yourself.

The connection of the button, which is intended for emergency situations, is carried out directly, and the engine through a box with a circuit and an automatic machine.

Tip: If you have assembled such a structure with your own hands at least once, you can easily repair such units. This is because you will know the whole mechanism of such a machine by heart.

Making a cutting machine based on a grinder

In addition to the classic variation of the cutting machine

There is also a simplified version of the machine using a grinder (angle grinder). In this case, a frame is made into which the second frame is attached to the sleeve. It is on the second frame that the angle grinder is fixed using metal fasteners.

In order for the angle grinder to be able to return to its original position, it is necessary to fix the frame and the angle grinder with a tight elastic band or spring. The frame itself is fixed on a prepared frame or on a large and heavy table. The weight of the table will ensure a minimum of vibration. If the frame is being prepared, then it must be fixed on a foundation prepared in advance. Such an invention can serve as a good tool in a home workshop or an excellent tool for cutting metal.

General feedback about the machine

If you search for reviews on the Internet about this unit, you will find only positive reviews. Indeed, such an invention is very convenient in its own way. With it, you do not need to suffer with a grinder in your hands, in a bent state. If you choose a cutting tool for certain jobs, then only a disk cutting machine.

Video reviews

Video review of the disc cutting machine:

Video review of a cutting machine using a grinder instead of a disk:

Video review of the assembly of a homemade machine:

Video review of the cutting machine:

It is useful to replenish the arsenal of metal-cutting machines of a home workshop with a pendulum saw. You can fix it on a workbench, next to the bench vise, in which the workpiece is clamped. The working tool of the saw is an abrasive disk. Steel bars, angles, pipes, sheets and even metlakh tiles, porcelain and glass are hardened to any hardness, and the cut surface is quite clear. If you replace the blade with a saw with a fine tooth, then you can cut wood, plywood or plastic, while a diamond blade will make it possible to process stones.

To secure the workpiece, it is convenient to use a rotary vice, in this case, cutting can be done at an angle, which is very convenient when preparing parts for welding.

Various attachments to the saw allow you to make shallow cuts and grooves, and even turn it into a regular "circular".

For such a saw, you will need a single-phase electric motor with a power of 340 W (from an electric grinder) or a three-phase AOL 21-2 type with a power of 400 W with a rotation speed of 2800 rpm. Transfer of rotation to the spindle of the machine - V-belt type A-I018 from the GAZ-24 car.

1 - electric motor, 2 - support, 3 - protective casing of the tool, 4 - tool (abrasive disc), 5 - protective casing of the belt, 6 - V-belt A-1018, 7 - screw M8X14 mm, 8 - drive pulley (D 16) , 9 - belt cover (steel), 1C - driven pulley (D 16), 11 - spacer (steel), 12 - washer (steel), 13 - pendulum feed handle, 14 - M6X12 mm bolt, 15 - M5 screw X10 mm, 16 - shaft (steel), 17 - cover (D 16), 18 - cover (D 16), 19 - sleeve (steel), 20 - washer (steel), 21 - nut (steel), 22 - ball bearing No. 203. 23 - body (steel), 24 - boss (steel), 25 - screw M6X8 mm. 26 - screw M8 X 16 mm, 27 - boss (steel), 28 - frame (steel), 20 - bolt M6X16 mm, 30 - pipe 1/2 "" (steel), 31 - axle (steel), 32 - bushing (steel), 33 - washer, 34 - M10 nut, 35 - plate (steel), 36 - intermediate housing (D 16).

The basis of the saw is a spinal frame of square section, to which the spindle body is welded on one side, and on the other - a plate for installing the engine. A 1/2"" pipe is passed through the groove in the frame - it is the body of the swing axis of the saw. When performing welding work, make sure that the axis of the motor shaft, the spindle shaft and the swing axis of the saw are strictly parallel. After welding, be sure to straighten the frame, clean the welds and paint with nitro enamel with a preliminary primer.

Belt guard and abrasive disc guard made of 2 mm thick sheet steel. It is best to weld blanks from the inside with a fillet weld. The belt guard is bolted directly to the motor and frame, to which the abrasive disc guard is also screwed. The drive handle is located on the removable cover of the belt cover.

Stuff the spindle bearings with CIATIM-221 grease before assembly. Insert felt rings impregnated with liquid lubricant into the grooves of the bearings.

At the assembled saw, the engine must outweigh the spindle and be at the bottom, between the supports, otherwise, when the saw is turned on, the abrasive may hit the workpiece and crumble.

Rice. 2 Pendulum saw attachments:

A - for cutting grooves:

1 - belt drive casing, 2 - bracket, 3 - desktop, fixed in a vice;

B - for cutting sheet material:

1 - belt drive casing, 2 - folding table, 3 - hinge, 4, 5 - brackets.

When working on a pendulum saw, it is necessary to strictly observe the safety regulations. The supply cable must be protected from mechanical damage by a steel flexible hose, which can be taken from the shower hose. The electric motor, as well as the saw itself, must be properly grounded. Fix the working tool on the shaft only with a nut with a left-hand thread. It is dangerous to operate the saw without safety goggles.

If during the operation of the device the drive belt loosens, it must be tightened, for which it is enough to lay a plate of the required thickness between the frame plate and the engine.

V. ZAYTSEV, design engineer
"Model Designer" 1985, No. 12