Bolt and cam operation

[Wagon Box Willy]

Can someone point me to a tutorial or graphic as to how the bolt spring and hammer cam work on a Remington?  I'm not near my guns to take it apart and see how they interact.

Thanks.
  Willy

[Flint]

The ear of the bolt is atop the wide part of the hammer's cam with the hammer down onto the cylinder's cap/nipple, or the SAA's hopefully empty chamber if you haven't fired yet.

  When you cock the revolver, the cam carries the rear of the bolt upward, releasing the bolt head downwards from the cylinder notch just before the hand engages the rachet, allowing the hand to turn the cylinder.  At the point where the bolt's extension has been adjusted to slip off the cam, it drops, raising the bolt into the (next) cylinder notch at or about full cock.  Pulling the trigger rotates the hammer forward, and the ramp on the cam pushes the bolt's extension sideways to reset atop the cam's wide surface, ready for the next shot.

Recocking the hammer starts the cycle over...

[Wagon Box Willy]

Thanks. 

I ask because on my new Ubertii Conversions one of the legs of the bolt extension filed.  So I assume it was adjusted to fall off the cam at the correct time to lock the cylinder.  I only ask because none of my other Remington's, Uberti or Pietta, have the extension filed to fit.

[Flint]

Re[placement parts are often oversized for adjustability...

[tommy4toes]

Bolt legs can also be filed to adjust when they drop.......that is part of the "tuning" process for a single action revolver.