size of Beni. 312 hammer?



Author Topic: size of Beni. 312 hammer?  (Read 115 times))

Offline Donald_G

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size of Beni. 312 hammer?
« on: January 04, 2019, 11:36:57 PM »
I'm having issues with my 312 I am trying to restore. It came to me missing the hammer so I bought a replacement on line. It looks just like pictures and drawings of a 312 hammer but the spring and trigger suggest something is wrong. I think it might be the wrong diameter for the 312. My barrel end at the hammer side is 13/16 by my measure and this hammer is 3/4 leaving a good amount of slop that I think is causing the issue. Can anyone with a legit 312 tell me the right diameter of the larger end of their hammer for comparison, and if 3/4 is too small, where can I find the right one?
And yes I'm aware of the hammer wear issues that can be caused from safety wear. But this isn't that. This hammer has a goid sharp lip on it and no signs of wear but I think the trigger can't engage well because the hammer can move over to the other side of the barrel and that's why I have a hair trigger. Also the bolt pull back suggests the spring isn't compressing straight in alignment but instead is bending in a curve for the same reason. I'm sure the hammer should not fit as tight as the end cap, but believe it should have less slop than it does.
  • US, Idaho, Eagle

Offline BrushPopper

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Re: size of Beni. 312 hammer?
« Reply #1 on: January 05, 2019, 12:30:22 AM »
The spare Iíve got reads just a haze over .80

Urs is abt 50 thou smaller.

PM me if you want it. Not using it for anything rt now.
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Offline Mike Baker

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Re: size of Beni. 312 hammer?
« Reply #2 on: January 05, 2019, 10:12:05 AM »
Yes they made 2 different OD hammers for the 312. Before 1-1-56 they were .805 OD and after 1-1-56 they were .765. I sell ether. Contact me at peter_built78@hotmail.com.
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Offline Donald_G

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Re: size of Beni. 312 hammer?
« Reply #3 on: January 05, 2019, 01:50:42 PM »
Thanks guys, that answers it all. Should have this thing working great soon thanks to your advice and expertise.
  • US, Idaho, Eagle

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