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Author Topic: Question on Finish Reamers  (Read 563 times)

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Offline DonT

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Question on Finish Reamers
« on: April 27, 2005, 05:08:29 AM »
I am looking at making a second barrel for a martini takedown I have.  It is .22 cal and going to add a 17hm2 barrel.

Are the Finish reamers sold by brownells such that they can cut the chamber without opening it first?  As long as you go slow...

Thanks..
DonT :D
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Offline gunnut69

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Question on Finish Reamers
« Reply #1 on: April 27, 2005, 06:10:35 AM »
Finish reamers aren't designed to remove much metal.  They burnish as much as cut.  I would strongly advise removing the bulk of the metal with a drill if not using a roughing reamer.  It could probably be done but would not be advisable.
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Offline jed

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Question on Finish Reamers
« Reply #2 on: May 02, 2005, 03:48:53 AM »
DonT.
Yes, you can use finishing reamers to do chambers, that is all I use. They cut just fine. A drill may not start dead center in bore, so you need a pilot. A roughing reamer just saves wear on a finishing reamer.
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Offline 760 Nut

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Question on Finish Reamers
« Reply #3 on: May 02, 2005, 07:05:15 AM »
Rough your hole to .010" undersized and use a feedrate of .005"-.010" per tooth for best surface finish results. We use carbide adjustable reamers in the mold shop with great success. (You can "sneak" up on your finished diameter with these)
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