1/4" Reamer..Drill bit size?

K

Kentucky

Well-Known Member
Would you suggest a "D" sized bit(.246) or a 15/64" @ (.234) Would that 15/64" be to much for the reamer to handle? Im concerned that the "D" bit may be to big to start with..
 
Download a drill bit chart and you ll be able to see the sizes on each side of the size your trying to ream too.
 
Up to 1/2 inch reamers you should use 1/64 under the reamer. Run the reamer at half the speed of the drill and double the feed rate.
 
Depends on what material you are reaming, and how you prepared the hole.

I often use a 6.1 or 6.2 mm drill.
 
I have been a machinist for 31 years, I have reamed hundreds of 1/4 Holes, 15/64 is the size you want.
 
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