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Military Firearm Restoration Corner

Cutting Coned Breech On Lathe


milsurpcollector

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I got the barrel off about 5 minutes ago.

 

I built another barrel vice, since the old one was already sprung from power torqueing the bolts on it.

 

With the two barrel vices the barrel broke loose with an audible pop.

 

i had been dripping kroil every day into the threads which are visble through the front hole for the scope base. The threads were soaked with kroil so it does penetrate.

 

Many thanks to everyone who replied to my thread, the advice was much appreciated.

There is no other website that has as much riflesmithing knowledge as this one.

 

Its an awsome asset to be able to ask a question and have a knowledgable answer that someone has actually used before.

 

 

Anyone know how to properly cut a cone breach on a lathe?

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If I were cutting a coned breech, I think I would secure the barrel between centers and take a truing cut on the barrel shank (the parallel portion in front of the threads). Then I would secure the muzzle in a collet or chuck and mount the steady rest on the parallel portion. That leaves the breech hanging out where you can swing the compound to the correct angle for cutting the cone. Advance and retract the tool with the compound travel, and move into the cut with the carriage.

 

Clemson

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