Reamer chatter

02 May 2013, 02:42

Tapper2

Reamer chatter

I just chambered a CM barrel for 30-06. I have chambered a 100 or so barrels and used other reamers 100's of times and never had a chatter problem. This was a brand new reamer from Clymer. I tried every trick I know without success, changing feed and speeds, different cutting oil, polishing out chatter and then finishing, stoning the reamer. Any other ideas as I'm at a loss.......Tom

02 May 2013, 04:25

dpcd

Pack the flutes with grease, use moly oil, increase feed. Check your pilot diameter. Use another reamer....

02 May 2013, 06:18

richj

same old barrel maker?

02 May 2013, 07:06

Tapper2

quote:
Originally posted by richj:
same old barrel maker?

I have used this barrel maker many times. Doesn't mean that the steel is not the problem. I think that it might be. It was tougher threading than normal......Tom

02 May 2013, 08:00

lee440

Many folks wont use Clymer anymore, they say the quality control is just not there. If I can't get a Manson, I go to JGS. Just got one today.

02 May 2013, 09:33

h2oboy

I have chambered one or two barrels. One company that I have worked for uses Clymer reamers exclusively. I have experienced exactly what you are describing. One trick I have used in this situation is to wrap a piece of paper around the reamer body. Make sure that the paper is even with the ends falling in between two flutes. This seemed to work 98% of the time.
Almost forgot... You have to remove the chatter marks from the chamber by sanding them out before you run the reamer back into the chamber.
Hope this helps,

02 May 2013, 17:00

Jim Kobe

If you have the chamber to fll depth, you will have to set it back and re-chamber. If not, and I just had to do this yesterday, wrap the reamer with a full wrap of plain old waxed paper, sqirt some cutting oil in the chamber and insert the reamer with the lathe running. Don't be afraid to drive it in, it will seem to push hard, take the cut, remove and do it again until you are to depth. Try it, you'll like it. You won't believe it, it works.

02 May 2013, 18:43

DManson

If anyone would like a copy of the article,
"Correcting Reamer Chatter", e-mail your physical address to me: david@mansonreamers.com

Best regards,

Dave Manson

02 May 2013, 20:42

Tapper2

quote:
Originally posted by Jim Kobe:
If you have the chamber to fll depth, you will have to set it back and re-chamber. If not, and I just had to do this yesterday, wrap the reamer with a full wrap of plain old waxed paper, sqirt some cutting oil in the chamber and insert the reamer with the lathe running. Don't be afraid to drive it in, it will seem to push hard, take the cut, remove and do it again until you are to depth. Try it, you'll like it. You won't believe it, it works.

Jim & Dirk... I'm going out right now and try the paper trick. As luck would have it I have plenty of barrel to set back. I will let you know how it works.......Thanks......Tom

03 May 2013, 06:11

Tapper2

Well, I tried the wax paper trick and it seem to help but not eliminate the problem. I am now convinced that it is a steel problem. I again ran into a problem cutting the new threads. This is something that just doesn't happen normally and it happened three times. This is the only time in 50 years of machining I have spun any thing in the chuck three times, especially while threading. Normalizing might have helped. Anyway, I'm through screwing with it. Thanks for your help guys .....Tom

03 May 2013, 08:16

gunmaker

Sounds like a Walther stainless barrel???
And, you may be chambering with a steady rest????

03 May 2013, 21:01

Tapper2

No steady rest, thru the headstock and dialed on center....Tom

03 May 2013, 21:35

gunmaker

barrel?

04 May 2013, 18:09

Jim Kobe

quote:
Originally posted by Tapper2:
Well, I tried the wax paper trick and it seem to help but not eliminate the problem. I am now convinced that it is a steel problem. I again ran into a problem cutting the new threads. This is something that just doesn't happen normally and it happened three times. This is the only time in 50 years of machining I have spun any thing in the chuck three times, especially while threading. Normalizing might have helped. Anyway, I'm through screwing with it. Thanks for your help guys .....Tom

The waxed paper has never failed me, just used it yesterday on a 257 Weatherby chambering job

Wrap the paper around the reamer at least twice, oil the chamber and push it in. It will take some effort to force it to cut at first, puh it in with the tailstock at least .100" and keep at it.

04 May 2013, 20:10

dpcd

I had what I considered hard chambering with a 9.3 barrel last year; I took it to Tri City Heat Treat over in Rock Island and they stress relieved it for me. That helped.

04 May 2013, 23:54

Westpac

Whenever I begin to encounter anything resembling chatter, I inspect and either resharpen or change the lead angle on the shoulder portion of the reamer, then, to correct the chatter, while applying pressure against the reamer with the tail stock, I hand turn the chuck using the chuck wrench, with the back gears engaged. That corrects the problems I've encountered in short order.

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