#1 rolling block action
#1 rolling block action
My #1 rolling block has a small bit off fore and aft play at half cock .What is the correct clearance betweenlocking surfaces of hammer and block ?
Re: #1 rolling block action
Hi There,
I not aware of any published specifications for the hammer
to breech block clearance. In my experience, when new
these Rolling Blocks have very little "play" between breech
and hammer at half-cock but most will exhibit a little per-
ceivable play in that area. This isn't really a problem so
long as the headspace is still good.
Cheers!
Webb
I not aware of any published specifications for the hammer
to breech block clearance. In my experience, when new
these Rolling Blocks have very little "play" between breech
and hammer at half-cock but most will exhibit a little per-
ceivable play in that area. This isn't really a problem so
long as the headspace is still good.
Cheers!
Webb
Re: #1 rolling block action
Though this is an old thread, I believe I can “shed some light” here . . .
The machining of the block and hammer is such that when the hammer goes completely into “battery”, all clearance twixt the hammer and block is eliminated.
Until that happens, some clearance is normal.
Remington engineers knew what they were doing.
The machining of the block and hammer is such that when the hammer goes completely into “battery”, all clearance twixt the hammer and block is eliminated.
Until that happens, some clearance is normal.
Remington engineers knew what they were doing.
-
marlinman93
- Posts: 477
- Joined: Sat Aug 14, 2004 10:47 pm
Re: #1 rolling block action
There needs to be some clearance so the hammer doesn't rub the breech block when the hammer drops. But I doubt it's more than a couple thousandth's.
I have bought a number of Rolling Block actions to use for BPCR type rifle builds, and have seen some pretty large clearances on some! The tails of the breech block wear over many decades of shooting, and I had one that had .007" clearance! Enough that when it was barreled up and fired the case rims would bend when fired. So little it wasn't noticeable, but after reloading the cases they wouldn't allow the breech block to fully close when cartridges were chambered! You could turn the cartridges until they sat in the exact location they were fired in, but not any other orientation. Could index cases to work, but that's not really a fix.
I had a good welder build up some tig weld on the tail of the breech block, and kept removing weld until the hammer could fall freely and block didn't rotate back. It then worked as new and no more bent rims. I'd say .001"-.002" is fine to allow things to clear, but maintain head space.
I have bought a number of Rolling Block actions to use for BPCR type rifle builds, and have seen some pretty large clearances on some! The tails of the breech block wear over many decades of shooting, and I had one that had .007" clearance! Enough that when it was barreled up and fired the case rims would bend when fired. So little it wasn't noticeable, but after reloading the cases they wouldn't allow the breech block to fully close when cartridges were chambered! You could turn the cartridges until they sat in the exact location they were fired in, but not any other orientation. Could index cases to work, but that's not really a fix.
I had a good welder build up some tig weld on the tail of the breech block, and kept removing weld until the hammer could fall freely and block didn't rotate back. It then worked as new and no more bent rims. I'd say .001"-.002" is fine to allow things to clear, but maintain head space.