Autonopedia

A

Cut off 9" of ^5/8" round for the D shackle and 14" of ^3/4" round for the bow shackle.

First upset each end as in Lesson 16 to a little over twice the thickness of the bar.

Next take a NEAR WELDING heat in the middle of the bar and, with the bottom end in the swage, upset to about 1½" times the original diameter.

B

Flatten the ends into bosses:

Next slot punch and drift the holes to:

C

Start bending the D shackle over the anvil back, keeping both ends even and the holes in alignment.

D

Complete the bend over a suitable size round bar or mandrel, and then line up the holes with a drift.

Note the extra metal surrounding the holes on the shackle in comparison with the trace hook.

E

The bow shackle is made in the same way.

The ends are brought parallel and the holes aligned by driving a drift through with a spacer between.

A large nut is placed between the anvil and the end of the shackle to prevent any distortion of the bow.

F

Here are the bow shackle; the shouldered pin and cotter made in Lessons 21 and 22; the hexagon-headed bolt made in Lesson 20; and the D shackle.