On Wed, 12 May 2004 23:32:38 -0400, Ned Simmons wrote:

In article 51701a28.0405121708.78d0be37
, says...
Sometime back one of our esteemed members posted that
if his machine had reverse, that he would only use a
keyed chuck on that machine.


I regularly power tap up to 3/8-16 in the mill with a 1/2"
Albrecht chuck--it works just fine. (Before installing a
VFD I plug reversed with a static converter for many years
when power tapping, which is also contrary to RCM dogma.)

A keyless chuck that's worn and/or been greased in the
wrong places may cause problems. The chuck will feel
springy when being tightened and release too easily when
reversed.

Ned Simmons

Ive pretty much stopped using keyless chucks on my mills when tapping as
it seems they nearly always slip for me. So Ive reglegated them to the
drill press or drilling only..which can be a problem as Ive a lot of
screw machine drill bits (left handed)

Gunner

"A vote for Kerry is a de facto vote for bin Laden."
Strider