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TM 9-254
3-4.
Staking - Continued
Figure 3-8. Staking Reticle and Retainer Ring
3-5.
Peening.
a.
General. Peening is a method used to move or stretch the surface metal of the work in a definite direction.
Probably the best example is the simple riveting-over of a bolt to keep the nut from unscrewing. The tools necessary to do
a peening job will vary somewhat according to the size and accessibility of the work. The ball, cross, or straight peen
hammer (fig. 3-9) is all that is necessary to do a job of peening. The roundness of the working edges or faces of these
tools make indentations in the work rather than cuts, thereby moving the metal without destroying it.
Figure 3-9. Peening Tools
3-8
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