WARNING / Lathe Chuck Brake

[LMMasterMariner]

Dear all,

Please note that chuck jaws are getting loose by every sudden stopping
if there is no work tightened in self centering scroll chuck.
If you do numerous starts / stops when checking how good is your brake,
there is great possibility that jaw(s) will fly out from the chuck.
Always observe lathe rule no. 1; NEVER STAND IN FRONT OF THE CHUCK.

Regards
LMMasterMariner

[Toolmaker51]

Dear all, Please note that chuck jaws are getting loose by every sudden stopping, if there is no work tightened in self centering scroll chuck. If you do numerous starts / stops when checking how good is your brake, there is great possibility that jaw(s) will fly out from the chuck.
Always observe lathe rule no.
1; NEVER STAND IN FRONT OF THE CHUCK.
Regards
LMMasterMariner

This is correct. Inertia of unloaded [no part in jaws] rotating scroll will assuredly spin after fast stops, maybe half a turn or so. As many members are running 5" or 6" chucks, few turns are needed to release the jaws from scroll and launch them.