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Here Jim is using the air hammer to cold peen the end of a stay bolt after it has been cut to length. (photo by Tom Kittel)

Peening the Crown Stays

Saturday, 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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Astoria Railroad Preservation Association
P.O. Box 541
446 W. Marine Dr.
Astoria, Oregon 97103
(503) 325-5323
e-mail: info@astoriarailroad.org

An Educational Non-Profit Corporation
Dedicated to Promoting Public Awareness of Railroad History
Through the Preservation and Operation of Vintage Railway Equipment.

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