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Steel for making pins
Posted: Tue Apr 16, 2013 9:02 am
by winnie_the_pooh
For the hinge pin/pivot pin for the hammer of a pistol and other pins used in a pistol.
What grade steel would be suitable?
Is it hardened?
Re: Steel for making pins
Posted: Tue Apr 16, 2013 9:12 am
by TwoRivers
Drill rod, as is or hardened, is a good choice.
Re: Steel for making pins
Posted: Tue Apr 16, 2013 10:37 am
by skeetshot
It is better to wear out a pin than the material it is housed in.
The pin should not be a drill rod, too hard.
The pin can be made of any alloy steel such as EN 31 or EN 28 which has not been hardened.
Normally this would be about 25 Rockwell C in hardness (relatively soft) and this is easily available from the thousands of shops that sell steel to industry. Available in rod form and can be turned to size by any machine shop having a simple lathe.
Re: Steel for making pins
Posted: Tue Apr 16, 2013 10:55 am
by winnie_the_pooh
Thanks for the replies.
Skeetshot, I would guess that the surface of the hammer pin would need to be polished to remove any machining marks so would need to be machined a fraction oversized?
Re: Steel for making pins
Posted: Tue Apr 16, 2013 9:38 pm
by skeetshot
winnie_the_pooh wrote:. . .
Skeetshot, I would guess that the surface of the hammer pin would need to be polished to remove any machining marks so would need to be machined a fraction oversized?
Especially if there is rotation around the pin, superfinishing is recommended. Otherwise it is not critical, but is such a small job, that this attention to detail should not be neglected.
Re: Steel for making pins
Posted: Tue Apr 16, 2013 9:47 pm
by winnie_the_pooh
[quote="skeetshot"Especially if there is rotation around the pin, superfinishing is recommended. Otherwise it is not critical, but is such a small job, that this attention to detail should not be neglected.[/quote]
Thank you.