Brass / Bronze / Pivot Pin

Bob La Londe · 2013-10-19T16:50:39+00:00

I have been slowly retrofitting an old Westerfield thotgun, and in the process I put to much strain on the trigger pivot pin and broke into 3 pieces. It looks like brass to me. The raw surfaces are very shiny like brass, and have no hint of the pastiness I sometimes see in bronze. It measures at about .090 as near as I can measure a twisted broken pin part about an 1/8 inch long. I can't find any bronze that small, and the nearest brass piece I can find from McMaster is 3/32 (0.09375). It looks like the only answer I am going to have is to polish down a piece of 3/32 brass rod. The trigger is a pretty integral part of this mechanism with a simple hook that holds back the firing pin when you close the bolt, so I am trying to decide which alloy is going to give the best life for this application. The gun is over 60 years old, so whatever the original pin was it did a pretty good job.

Oct 19, 2013 22 Replies

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Jim Wilkins 12 years ago

Recently I made some brass electrical contact pins 0.078" (2mm) in diameter. The best result was from turning to final diameter (from

0.093") with a series of short cuts very close to the collet.

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Gunner Asch 12 years ago

It cuts fine with a nice sharp postitive rake HSS tool

Gunner

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Lloyd E. Sponenburgh 12 years ago

Gunner Asch fired this volley in news: snipped-for-privacy@4ax.com:

For 360, I get better cuts with zero rake.

Lloyd

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