We make the base
In order to make a tool from a hand tool, we need to make a special table. As a bed, you can use wooden or metal goats, which are connected together by a board with a section of 50 millimeters. A table is fixed on top of this base. Make the countertop can be made of two steel plates 4 mm thick. You can also use thick bars. In the middle they are connected by a lintel of plywood with a thickness of 20-25 millimeters. The gap between the sheets should be left at 10-12 millimeters.
Important! It is necessary to achieve an ideal parallelism of the inner edges of the plate.
The tool will be attached from below to the table so that the saw is in the middle of the gap between the sheets of the table top. In this position, a small circular saw is attached to the table to drill holes. In order to make the table-top smooth, all holes are screwed out and tightened with screws. In the gap between the surface plates insert liners with a slot for the saw.
Engine mounting
When deciding how to make a mini circular, you need to consider the design of the transmission mechanism from the engine to the saw. Naturally, you can put small circulars directly on the axis of the engine, it will be much easier. However, with such a system, the power of the mini circular will be much lower. As such a mechanism, you can use a spindle from a bicycle. The spindle is the housing in which the shaft with bearings is located. It is cut from the frame with a hacksaw. The asterisk will not be needed, since it is better to replace it with an asterisk from the motor D6 or D8 .For a tight fit of the sprocket on the shaft, a transition sleeve must be made.
For installation on the spindle of a circular saw, the diameter of the hole must be taken into account and, based on this, the outer diameter of the adapter sleeve should be determined. The spindle must be fastened to several spindles at the spindle. A plate with a thickness of 5 millimeters is mounted to the body of the spindle unit. A sprocket is attached to the shaft, which must be 2.5 times larger than the one mounted on the spindle. They need to be fixed strictly in one plane. After fixing all the parts, the chain is put on and the circular is ready.
Important! It is necessary to ensure that the horizontal hinge does not have a play.
Mini circular saw "in a box"
The above method allows you to make homemade mini circulars for work in a barn or a home workshop. However, they still need a stationary table top. Now consider how to make a mini circular without it. For this you need a body. Its side walls are made of aluminum plates 5 mm thick. It is assembled with the help of corners and bolted.
The upper panel is made of steel, and the saw block is attached to it. Also on top is an aluminum sheet, which forms a saw surface. The body is made of metal for the reason that it will have a rectangular shape. When it is made of wood, it will be trapezoid. However, if it does not matter, it can make the body wooden.
After mounting the unit, the engine you selected is installed. To adjust the depth of the cut, you need to twist the two screws. The first screw, in fact, raises or lowers the block. The second is needed to fix the block to avoid moving it. Further, guides are made, which can be made from simple metal corners.
Note! This mini circular can be stored freely in a closet or in a storage room.