Stock: Piece 61⁄2 × 3⁄8 in. square.
Directions: Heat the metal in the middle and bend it over the rounding edge of the anvil.
When the piece is bent we still have to make it square on the outside and rounding on the inside. The bend just made should be placed in the fire and re-heated. Cool the stems off in the water to within one inch of the bend. Place the point of the cold stem on the anvil and strike on the hot corner. This is repeated on both outside corners until the piece assumes the shape of the drawing. This same result can be obtained by upsetting the metal in the centre before bending, as shown in the drawing.
FLAT WRENCHES
Wrenches are used for screwing nuts on bolts. They can be made in two ways: (1) One known as the solid wrench is made without welding, (2) the other, is made of wrought iron and is welded.
S wrench of soft steel: The sketch here is of a wrench made from soft steel 1⁄2 × 1 × 5 ins. Fuller down the stock edgewise as shown. Draw out the centre 1⁄4 in. thick and taper it from 3⁄4 to 5⁄8 × 5 ins. long. Cut the corner off, as shown by the dotted lines, and round the two ends up to the size given. Punch a 1⁄2-in. hole in the large end and a 3⁄8-in. hole in the small end of the bar. With a sharp chisel cut a V-shaped plug out of each end, tangent to the circles.
Wrench hardie
Jaws: The jaws of the wrench are finished with a tool called a wrench hardie, placed usually on the anvil for the purpose of finishing up work of this kind. Finish up both ends in the same way. Heat the wrench at the nick and cool the jaws off in water. Place the nick on the horn of the anvil and bend it as shown. Repeat on the other end. If the wrench is carefully made it will require no filing to fit the nut. These wrenches are sometimes polished and case hardened to prevent the jaws from wearing while in use.