holding a reamer in a collet

Ah, I see said the blind carpenter as he picked up his hammer and saw. It is actually trying to hold back rather than move forward. Gonna have to try a couple. Thank you.

"Billy G" :thinking:
 
McRuff said:
I have to say that while a floating reamer holder would probably be best. I have reamed 10's of 1000's of holes in my 31 year career as a Tool & Moldmaker with no ill affect and 98% of them or more have been done with a Albrecht drill chuck.
I see no real reason to get carried away as a hobbiest buying and building a tool that most will gain no better results from. Some simple rules for reaming, to fast of spindle speed will generally result in a under sized hole, choking up on the reamer will generally result in the hole being oversized especially at the mouth of the hole and sometimes has chatter as it enters the hole, if your reamer is 6" long hold only the last 1/2"-3/4" of it and it will float right into the hole, use a similar method for shorter smaller reamers. If you want great results drill the hole within .010"-.012" of size and then bore the 1st 1/8" of depth to within say .005" and then follow it with a reamer, the hole will be straight, in location and on size. The above would be for say any hole over 1/4", adjust accordingly if smaller.

Remember most all reamers have a chamfer'd lead that helps find the drilled hole, once the lead has it the reamer will follow the drilled hole. Heck I would worry more about the crappy foreign made reamers than I would a drill chuck or collet. YMMV
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Excellent advice.
 
Metalmann said:
You can also peen a reamer to make it cut .001-.002 larger. Stone, after peening.
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Its easier to scrape the flute or flutes with a piece of carbide or an old carbide insert. Does the same thing and it only takes a few seconds, been doing that since before I started working in shops. Learned that one from my father and some of the older guys he worked with when I was a kid.
 
This has sure been a great thread on Reamers, most of which I was not aware of, learned a lot.

Thanks guys
Ken
 
Thanks to all for the replys and information. I had only read a little about how to hold a reamer but have learned a whole lot more about the reamers themselves and the machine reaming process. Having never used a reamer in a machine and have only hand reamed a couple of holes long ago I found the information very educational.

Thanks,
Benny
 
bcall2043 said:
Thanks to all for the replys and information. I had only read a little about how to hold a reamer but have learned a whole lot more about the reamers themselves and the machine reaming process. Having never used a reamer in a machine and have only hand reamed a couple of holes long ago I found the information very educational.

Thanks,
Benny
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I 2nd what Benny said. Thanks to everyone that shared information.
Phil
 
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