MSC has a 7/8 end mill 1/2 inch shank #01727486
for $11.92 in my catolog [1999] but you will have to grind
the ends flat. And it will probably cut oversize. If size is important Msc
has a 3/4 end mill with a 1/2 inch shank
and if you grind the end flat and use it as a first cut the
7/8 will cut closer to size. Jim

"Marty" wrote in message
...
I have to drill a number of flat bottom holes, 7/8" diameter and 1/10"
(.1") deep in some 2/10" (.2") thick aluminum. Is there a source for
flat bottom drill bits of this size that will fit in the 1/2" drill
chuck that's on my drill press? If there are no bits of this size with
a turned down 1/2" shank, can an adapter be purchased to go from the
7/8" bit to the 1/2" chuck? Thanks for any help. Marty