Surfacing Boltface/Bushing Firing Pin hole

[Joe]

Could any of you see anything wrong with machining a boltface in a CNC Mill?
I am talking about standing the bolt body up vertically and running a Circular pocket program with a solid carbide endmill.

Of course, the bolt body would need to be held perfectly vertical in V-Blocks.

I want to bush my firing pin holes and resurface the bolt face at the same time.

I am trying to get away from doing it in a lathe. Don't want to turn the bolt in a steady rest and don't want to build a fixture for holding the bolt body in a chuck.

 

[sicero]

Joe, I have put the bolt in one four jaw and that four jaw in a bigger four jaw. You just put it in from the back with the handle in the cut out on the big chuck. Depending on the handle the ball may need to come off. Kenny

 

[bill larson]

Boltfaces

Joe,I do it in a lathe.... no special tooling req`d.... use a 5/8 shoulder bolt to drive with and preset steady rest for bolt body.Reface bolt,bush pin hole and touch back of lugs in same set-up.Note turn 5/8 surface of shoulder bolt down front and back so you`re chucking on about a 1/4" surface.This is the way Ferris Pindell taught Skip Otto and Skip taught me....hope this helps.
I`ve learned so much on this board and the knowledgeable people who contribute some of who I`ve met... it`s a gold mine of information....OMHO
Bill Larson

 

[jackie schmidt]

Joe

Anything is possible if you are willing to take time on a set up that does insure that the finished face and hole are truly straight with the bolt body.

When I do this, I just chuck up a piece of steel and thread about 5/8 inch length of 1/2 13 tpi to a shoulder. I screw this into the end of the bolt, chuck it back up, and put a center in the firing pin hole. I use the buck chuck to get the handle end running dead true. I then set my little roller steady rest just behind the locking luggs, and now I can do anything to the bolt face, firing pin hole, etc I want.

This is about as simple as it can get. But, Like I said, you can do it anyway you wish, as long as the results meet your expectations.........jacki