Lesson 27: CART SHAFT STAPLE
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 A
Mark off a 1/2"
round bar as shown in the drawing, using the allowances described on
page 78, paragraph (b).
Take a NEAR WELDING heat, and from the mark nearest one end, reduce
the diameter to 7/16".
There is no need to use a bottom swage for this operation: square it
with a hammer, then round up as described in
Lesson 1.
Test the diameter in a 7/16"
hole.
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|
 B
Next, take a BRIGHT RED heat at the second mark and, keeping
the mark on one side bend the bar over the bick of the anvil. |
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 C
Take a NEAR WELDING heat in the bend, with the long part lying in a
bottom swage and the short end upwards, and strike the top with a hammer
to drive the bend into the swage.
This will upset the metal slightly and produce a sharp bend, with the
punch mark exactly in the middle of the side of the thickened corner.
Reduce and bend the other end in the same way; then twist out of alignment
for threading as described for the U-bolt in
Lesson 2.
Twist straight again.
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