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Simple Universal Lathe

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Simple Universal Lathe

This homemade universal machine (Fig. 1) is easy to manufacture and reliable in operation. With the help of it you can sharpen any cutting tools. At the free end of the motor shaft instead of nozzles for abrasive and grinding wheels using a special adapter, you can install a standard drill chuck, which allows not only drilling holes, but also milling grooves in wooden parts. The engine for the machine is taken from the Vyatka washing machine of the old sample.

Fig. 1. Simple universal machine:
1 - leg (4 pcs.);
2, 2a - screeds (4 pcs.);
3 - bed plate;
4 - strut (2 pcs.);
5 - workbench;
6 - kerchief;
7,7a - side racks [2 pcs.);
8 - bracket (4 pcs.);
9 - table top;
10- working shaft assembly bracket;
11 - node of the working shaft.

Fig. 2. The site of the working shaft and its main parts:
1 - case cover;
2 - housing; 3 - shaft;
4 - washer for circular saws (2 pcs.);
5 - pulley;
6 - nozzles for installing an abrasive wheel.
7 - nozzles for drill chuck.

Fig. 3. The main parts of the saw table and workbench (position numbers correspond to Fig. 1);
4 - strut (2 pcs.);
5 - workbench;
6 - kerchief;
7,7а - lateral racks (cutout only in part 7);
8 - bracket;
10 - working shaft assembly bracket.

Working tools and electric drive of the machine are placed on the frame. Its main parts can be either from metal (corners or rectangular pipes) or from wood. Of course, it is easier to make a frame of wood, then all the details of the structure can be assembled with screws.
The base of the bed - carpentry plate 3 (see Fig. 1) with a thickness of 50 mm and size. 400x700 mm. The legs 1 (4 pcs.) Are made of 50x50 mm bars with a length of 500 mm, and the screeds 2 and 2a (4 pcs.) Are made of 50x50 mm bars (a single 500 and 300 mm, respectively). On the plate 3 beds the electric motor is bolted. It has shaft overhangs on both sides of the hull. It is very convenient. At one end of the shaft, using special nozzles (Fig. 2), various abrasive wheels are installed for sharpening, grinding or polishing, or a cartridge for drilling and milling grooves. On the other - a V-belt transmission pulley (under the belt O (Z) of the drive of the working saw of the circular saw. The bearing unit of the working shaft (the design and details of this unit are shown in Fig. 2) is bolted to the bracket 10.

The belt tension is regulated by a set of gaskets for the bearing assembly. At the end of the working shaft 3 (see Fig. 2), M 12 thread is cut to secure the longitudinal and transverse circular saws. In addition to saws, you can install cutting wheels for metal cutting or special disc cutters. The tabletop of the saw table 9 (see rice, 1) is a sheet of plywood 8 mm thick and 350x450 mm in size. It rests on two vertical posts 7 and 7a, fixed on the plate 3. In the table top there is a slot for exit of the saw blade.
The depth of cut can be changed by moving up and down the table tops 9 on the brackets 8, which are fixed in the desired position with screws.
The dimensions of the main parts of the saw table are as indicated in fig. one.

In fig. 3 shows the dimensions of the workbench 5, which is designed for sharpening, drilling and milling grooves. For the safety of the work area of ​​the saw blade and grinding tools must necessarily have a protective fence (conventionally not shown in the figures). In addition, when sharpening and drilling the belt transmission must be disconnected.