Peening the Crown StaysSaturday, October 11, 2014 by MC
After the crown stays are in place, they must be cut off leaving 1/4 inch of material that is then peened over to form a head similar to a rivet head. A shallow hole is drilled in the center of each one, and an air hammer with a shaped chisel (with a nib to ride in the hole and keep it centered) is used to form the rounded head of the bolt. Initially the inside end is formed with the air hammer while a heavy bucking bar is held against the outside end of the bolt. When we are finished on the inside we will trade places and peen over the outside ends.
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