AR15.Com Archives
 Chamber reamer question
scottpoole  [Member]
1/3/2012 10:45:19 AM EST
Need a little help/advise. I bought a PTG chamber finish reamer (this one) that I want to use on an AR-180B that I think has an undersized chamber.

Problem is, it didn't come with any instructions and I'm not sure exactly how to go about using it.

The description at Midway states that it has a 3/8" drive shank for use with a tap handle. Could I use a 3/8" ratchet extension instead? Does the reamer self-center or does it need to be mechanically centered (like with a lathe, which I don't have) or something else?

Basically, how does a chamber reamer work and what besides the reamer do I need?

Thanks!
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458winmag  [Team Member]
1/3/2012 3:23:46 PM EST
Originally Posted By scottpoole:
Need a little help/advise. I bought a PTG chamber finish reamer (this one) that I want to use on an AR-180B that I think has an undersized chamber.

Problem is, it didn't come with any instructions and I'm not sure exactly how to go about using it.

The description at Midway states that it has a 3/8" drive shank for use with a tap handle. Could I use a 3/8" ratchet extension instead? Does the reamer self-center or does it need to be mechanically centered (like with a lathe, which I don't have) or something else?

Basically, how does a chamber reamer work and what besides the reamer do I need?

Thanks!


This has so much potential for Fail, I hardly know where to start.

What makes you think it's chamber is undersized? How will you determine when it is corrected? Use a tap handle. You don't need a lathe, you have a tap handle? Think of it as a very slow twist
(if any) twist bit. A finishing reamer............ And someone qualified to use them correctly

http://www.ar15.com/forums/f_6/49_Gunsmithing.html

You'd be better of sending back to Armalite