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A working motor from an automatic washing machine should not gather dust in the garage. Even a home master can find a use for it. We will tell you how to make a homemade circular from a washing machine engine.
Such a tool will help to cut firewood, master carpentry. However, be careful: careless use of a homemade machine can lead to unpleasant consequences. Therefore, before taking on a job, you must be completely confident in your abilities.
Which engine to choose to make a circular
The choice of engine for creating a mini-circular depends on its power. It is advisable to use an engine with a V-belt, which will allow you to transfer its speed to the saw blade of the machine.
A 350 mm disk will require 1 kW of power to run. A disc with a diameter of 170 mm will require about 500 watts. Therefore, you can put the motor from the old washer.
It is important to regulate the number of revolutions of the motor, otherwise instability in operation will cause the disc to tear the material.
In the washing machine, the speed is controlled by a tacho sensor, which controls the control module. But it is impossible to connect the module to the circular, so install a voltage regulator. Use the wiring diagram for correct motor installation.
Do-it-yourself circular with a washing machine engine
You figured out which engine is needed and how to connect it. Now consider the design diagram of the circular saw.
For home-made circulars, the absence of a bearing assembly is allowed, which will greatly simplify the design.
The main load will be on moving elements. This:
- saw shaft and electric motor;
- motor pulley and saw shaft;
- drive belt.
Consider the features of each of them:
- The drive belt does not have to be taken from the washing machine, other belts can be used. The main thing is that they have notches, like a V-belt.
- On the small pulley, you need to make flow grooves. The belt will cling to them during operation, which will avoid slippage.
- A larger disc is welded onto the large pulley, which will prevent the belt from slipping off.
- To fasten the saw blade, use the shaft where it is mounted, as well as the washer and nut with which it is fixed. It is recommended to pick up or take this kit from the factory installation so that the drive is as secure as possible.
When creating a design, you need to consider that it is designed for a three hundredth disk. Of course, a do-it-yourself circular machine is only suitable for domestic use. Therefore, try not to overload the engine.
Electrical preparation
To start the saw, you can install a starting device. If thermal protection is provided for overcurrent, then when jammed, the circuit breaker will turn off automatically. The button from the door lock will do.
Often such machines are stored in the yard, on the street, so protect the electrical part from moisture.
Frame and bed manufacturing
The bed is made of a metal sheet 3 mm thick. Before you make a frame, prepare a 30 mm metal corner.
As shown in the photo above, the master installed the frame in homemade pipe racks. Now it is possible to adjust the height of the device. However, it is recommended to make a solid frame by welding pieces of the corner together. Strong vibration loosens bolts and other elements over time.
When making a circular, consider the possibility of its repair. All moving parts must be easily lubricated. Before starting work, it is desirable to prepare detailed drawings.
Please note that the mini circular saw differs in size. It is much smaller than usual and can be stored in the pantry.
How the device works
The engine is started, which drives the shaft with the pulley. As a result, the drive belt rotates, transferring speed to the saw blade pulley. The saw begins to rotate, allowing you to cut the material.
A homemade circular machine is always useful in the household. Due to the fact that you can make it from improvised means, it will cost you almost free.