user 48702
Richard Turner
- Joined
- Sep 17, 2020
- Messages
- 1,142
- Reaction score
- 2,799
Your deformed bolt "ear" is actually the left leg of the bolt that rides up and slips over the bolt cam on the hammer. A new bolt has to be hand fitted and adjusted to regulate the timing of the bolt drop. The deformation of what you describe on the left leg "ear", is where the timing and bolt drop was adjusted at the factory. They don't always do a clean job of fitting at the various factories when adjusting the hand, I've experienced some bolts in revolvers from both Uberti and Pietta that have been better or worse as far as grinding and filing goes.
The tip of the left leg has to be slightly beveled at an angle, and in some cases a little taken off the tip to control bolt drop in relation the the rotation of the cylinder. You can see the slight bevel at the rear tip of the bolt as shown at "C", it allows the tip of the leg to slide smoothly over the bolt cam on the hammer. The timing of the bolt drop into the cylinder notch is determined at "D". If not enough metal is removed at point "D" then the bolt will not drop. If too much metal is removed, the bolt will drop too soon which will of course result in rubbing or cutting a drag line around the cylinder and possibly peening the leading edge of the notch. Below is a diagram which shows the points that has to be fitted for proper timing.
.
The tip of the left leg has to be slightly beveled at an angle, and in some cases a little taken off the tip to control bolt drop in relation the the rotation of the cylinder. You can see the slight bevel at the rear tip of the bolt as shown at "C", it allows the tip of the leg to slide smoothly over the bolt cam on the hammer. The timing of the bolt drop into the cylinder notch is determined at "D". If not enough metal is removed at point "D" then the bolt will not drop. If too much metal is removed, the bolt will drop too soon which will of course result in rubbing or cutting a drag line around the cylinder and possibly peening the leading edge of the notch. Below is a diagram which shows the points that has to be fitted for proper timing.
.