TOOLS-HANDMADE

Good locksmith tool produced by students of the Moscow school № 787 on the lessons of labour from scraps of reinforcing steel and other metal waste. After heat treatment, its strength is not inferior to the factory.

 

Below are a few samples of such a tool that can serve in schools, clubs syut, clubs of young technicians, and just the tinkerers: the tool can be made from scratch and tailored to the individual wishes of each.

 

Locksmith tool (Fig. 1) — screwdriver, chisel, punch — made from scraps of reinforcing steel with subsequent thermal treatment (quenched and tempered).

 

To do this, in a muffle furnace or a furnace heated to the working part of the rod to a red glow (700-750°), and then a hammer on the anvil, give it the desired shape. Thereafter, the blank chisels, screwdrivers, punch finally treated with a file or emery stone. And in the swage to additionally rivets on the end is drilled a shallow hole, which then finally brought a drill with round shank for receiving the spherical depression.

 

 

Fig. 1. Tool kit:

 

Further, it is necessary to strengthen the working part of the tool, heating it to a temperature of 830° (light red glow). Cooling in water at room temperature, and immersing the working edge of the tool for 2-3 s. Then, taking the working part of the water, quickly strip the control strip on hardened location with emery paper or abrasive wheel. Wait for the ka it has a tint of light yellow color (220°), re-dip the product in water. This treatment with a partial re-release makes the working edge less fragile.

 

The quenching and tempering handmade can be divided without two operations: after heating and full cooling, the product is re-heated to the tempering temperature of and again cooled in water.

 

Amateur hacksaw (Fig. 2). The main longitudinal strap saw blade of the machine is made from steel strip 3×20 mm, and the brackets and the handle is made of blanks with thickness of 1.5–2 mm.

 

 

 

Fig. 2. Saw blade machine:

 

1 — front bracket, 2 — the main strap, 3 — rear bracket, 4 — handle, 5 — natina screw, 6 — shearling.

 

For the front bracket does the billet size 190Х20Х1,5 mm, bent in half and crimped in place bend the round rod Ø 8 mm. the Rear bracket is assembled from two plates of size 90X20X1,5 mm. the two halves of each bracket are joined with rivets Ø 3 mm (see Fig. 2). The ends of the brackets on one side of RA will be jammed and tightly crimped on the longitudinal main plate.