Pendulum saw. Drawing, description

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Pendulum saw. home workshop

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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 disc. He is "too tough" steel bars, angles, pipes, sheets, and even metlakh tiles, porcelain and glass, 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-1018 from the GAZ-24 car.

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.

Pendulum saw (click to enlarge): 1 - electric motor, 2 - support, 3 - protective casing of the tool. 4 - tool (abrasive disc), 5 - belt guard, 6 - A-1018 clip belt, 7 - M8x14 mm screw, 8 - drive pulley (D 16), 9 - belt cover (steel), 10 - driven pulley (D 16). 11 - spacer sleeve (steel). 12 - washer (steel), 13 - pendulum feed handle, 14 - M6x12 mm bolt. 15 - screw M5x10 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 - housing (steel), 24 - boss (steel), 25 - screw M6X8 mm, 26 - screw M3x16 mm, 27 - boss (steel), 28 - frame (steel), 29 - bolt M6x16 mm, 30 - pipe 1/2 "(steel), 31 - axle (steel), 32 - sleeve (steel), 33-washer, 34 - nut M10, 35 - plate (steel), 36 - intermediate body (D 16 )

The main details of the saw (click to enlarge)

Attachments for a pendulum saw: A - for cutting grooves (click to enlarge): 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

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.

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.

Author: V.Zaitsev

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