View Single Post
  #3  
Old January 22nd 07, 01:30 PM posted to rec.aviation.homebuilt
Maxwell
external usenet poster
 
Posts: 1,116
Default Need Info On Reamers


"Morgans" wrote in message
...

"Maxwell" wrote

If he is trying to hold .002" oversize, an oversized drill is going to be
much less predictable, probably more difficult to find and a good bit
more expensive.


The key is the type of bit he is advocating dressing and using.

A wood cutting Forsner style drill bit eliminates any possible springback,
as it cuts only on a straight line from the center to the diameter, and
pretty much level across the hole. It has no flutes to try to dress, and
a small area to dress. It is the ideal bit to re-size.
--
Jim in NC


He didn't say what type of drill bit, and forstner bits do not eliminate any
possibility of spring back, try drilling rubber or felt.

Also, how do you easily resize a forstner bit? Are you sure the others are
not talking
about spade drills?