titanium

[308 Hawg]

I think that a "sinker" EDM would be a good choice for cutting the cam surface on lug abutments. The problem now becomes machining the electrode but that would be simple on a 4th axis VMC. A friend has a VMC with 4th axis and is hinting that I need to buy an older ram (sinker) EDM.
I think the process that makes pistol barrels is called "ECM" for some form of electro-chemical machining. A company that does this was setup at the SHOT Show in '98.

 

[Black Diamond 408]

Daveosok

I'm not sure if the EDM can cut the abutments as Brent wants, they have to twist as the relief goes into the action (like. I sent him a email about the process that Jay McMumm used to cut his. If he needs some pics I think Jay will oblige.

 

[daveosok]

Sinker/Ram style EDMing will work. However this type of machining leaves a rather large haz area as it runs hotter than wire edming. If you do machine it the haz area will need to be chemically removed as it will be a high stress area.
I'm woring on getting a sinker style edm but it wont be any time soon so all of you who are hopping stick with me maybe one day I'll have it lol

.
Dave