On Mon, 24 Mar 2014 19:47:31 +0000, Cydrome Leader wrote:

I keep running into an issue with spiral reamers that leave what appears
to be rifling in anything (aluminum) that I ream.

changing speed and feed rates doesn't seem to matter. Dry or with
cutting oil doesn't seem to matter either.

The straight reamers of the same size don't seem to have this problem.

What might be causing this, or how does one stop it?

Use straight reamers?

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com