- Joined
- Jan 25, 2022
- Messages
- 110
I was trying to thread a piece of 3/8 12L14 in a ER40 collet chuck with a 3/8-16 die, but the piece kept slipping (turning) in the chuck.
Installed a 3-jaw (6 "), but it still slipped no matter how tight I could get the chuck, using the normal chuck key.
I was reluctant to use a breaker bar on the chuck key.
Was able to finish with the piece in a vice.
3/8-16 is pretty aggressive and takes some effort. Maybe that's the limit of lathe chucks?
Kevin
Installed a 3-jaw (6 "), but it still slipped no matter how tight I could get the chuck, using the normal chuck key.
I was reluctant to use a breaker bar on the chuck key.
Was able to finish with the piece in a vice.
3/8-16 is pretty aggressive and takes some effort. Maybe that's the limit of lathe chucks?
Kevin