Quick Change barrel parts

[Robinhood]

There may be people on here that have the tooling for anything below 45 Rockwell C. If you used 4140 or anything with a commercial HT it is probably less than 35 RC. Holding .001" may not be an issue either.....I was thinking large shank for the WSM. Sorry to hear you got stressed out. Single pointing the threads is probably the hardest part. I always make a gauge when threading bores. Go on one end and no go on the other. I have been known to do an undersized one also to tattle tale when I am getting close. Not as hard but 416 may be a better option for what it is.Regardless, I really enjoyed seen the finished products.

[shoots100]

We used cold rolled steel for all of the testing, then destroyed a lot of semi expensive tooling practicing on heat treated steel till we got the process and coolant application down.
Then we destroyed all of the cold rolled steel parts, as we didn't want any of them to be mistaken for heat treated parts.
Once we made a set that passed inspection and testing at the range, We bought the real expensive tooling and made better jigs to make the finished parts you see here.
All of the final dimensions are in the machinists computer.


[IMG][/IMG]

[Robinhood]

Did you PMI the OEM parts to ID the material and did you test OEM for hardness? The millwork on the recoil lug looks cnc. Did the machinist reserve the right to manufacture and sell parts? Again Really nice to see someone take this on.

[shoots100]

Did you PMI the OEM parts to ID the material and did you test OEM for hardness? The millwork on the recoil lug looks cnc. Did the machinist reserve the right to manufacture and sell parts? Again Really nice to see someone take this on.

HAAS750SS mill and CNC lathe did all the work.
Didn't check anything on the factory parts but the dimensions and since they were sloppy, we tightened them up a bit.
We used certified hardened material, so I'm not worried about the strength, but I did put a few flak jackets over the rifle and used a string for the first couple of high pressure rounds I fired during range testing.
My friend owns a small but well equipped machine shop and I was there to help design, test and make the jigs needed, plus pay for all of the tooling + material.
All this occurred when we both had the spare time to work on the project and when the machines weren't being used between jobs, which was usually very late at night.
That's why it took a long time to complete and why I won't ask my friend for anything.
I'll talk to my friend about coming up with a price for the parts while we're coyote hunting this weekend.