On 8/18/2009 Roger (K8RI) wrote:
> BTW drilling and tapping copper for even 1/4-20 or 1/4-28
> can be a chore and very difficult for the smaller sizes such as 12-24,
> 10-24 even when using the proper cutting oil.
I know the reputation for copper being hard to drill/tap, but I've never found
it that bad. Particularly with tapping, I'd make sure I was only trying to do
say a 60% thread or so. What I have NOT tried, and MIGHT work well is a
"thread forming" tap, taking advantage of the coppers ductility
--
73 de KG2V
For the Children - RKBA!
"To preserve liberty, it is essential that the whole body of people always
possess arms,
and be taught alike, especially when young, how to use them..."
-- Richard Henry Lee, 1787
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