03-22-2015, 08:17 PM
(03-22-2015, 07:07 PM)f350ca Wrote: My manual Hardinge with automatic kick out recommends not threading above 1000 rpm. On small threads say under 3/8 I cut at 6-800 rpm, first couple of times was scary though.
Yup, scary as hell. Especially when threading to a shoulder or to the bottom of a blind hole.
Tom