Autonopedia

A

Take a NEAR WELDING heat on one end of a piece of diameter bar 18" long, and upset one end as described in Lesson 13 A and B until the end is about twice the size of the bar.

Do not mark off for the slot until the head is formed.

Re-heat the upset end and lay it in the swage. Forge the head by striking at an angle of about 45°. Turn the bar a little between each blow to keep the head even.

B

Take a second heat and, keeping the head central on the bar, continue working it up until it is an even mushroom shape.

Keep the bar the original diameter, with a clean square shoulder underneath.

C

Now mark off and centre punch the slot.

To punch the slot, take a NEAR WELDING heat over the mark, lay the bar in the swage and, with the end of the slot punch on the dot, make a slot as in Lesson 16.

D

Dip the end of the punch in water, replace it in the hole and then forge in the swelling as much as possible to save the labour of filing it to size later.

E

At a BRIGHT RED heat finish shaping to size and clean up any roughness with a bastard file.

F

A 4" length of ½" x 16 s.w.g. is needed for the cotter.

It is made by folding the strip over a piece of ¼" " round then squeezing to shape between the vice jaws.

This is the finished cotter and pin for the shackle with turned eyes made in Lesson 17.