stuck chuck again

[HopperParticipant @hopper]

Posted by Philip Burley on 06/06/2020 07:42:13:

The copper grease sounds like a sensible idea I wil get some .. have to be on line though , till local shops reopen

Phil

Just use whatever oil you use on the rest of the lathe until then. Its better than nothing.

[old martParticipant @oldmart]

I would not recommend any grease on the threads, a light coating of oil is better. The threads should be cleaned properly occasionally. As already mentioned, be sure to screw the chuck up firmly, then the shock of starting the lathe will not tighten it further.

[HopperParticipant @hopper]

Copper grease has worked for me for decades. Including lathes a lot bigger than Myfords. Doesnt collect any more swarf than oil. And you can wipe it off clean and apply new whenever you like. Never had a tight chuck in all that time.

+ 1  on screw the chuck up against the register collar before starting the lathe.

Edited By Hopper on 07/06/2020 02:10:16

[not done it yetParticipant @notdoneityet]

then the shock of starting the lathe will not tighten it further.

Just another possible advantage of a VFD and programming a soft start?

I’ve yet to have more difficulty in removing a screwed chuck than a quite hefty wallop, with a lump hammer, at the end of a 500mm adjustable spanner. NOT with the lathe in back-gear, I might add.🙂

A previous owner of my 5’ drilled through the tail end of the spindle, so a long bar can be used to lock it if necessary. The holes are currently taped over to prevent anything, going through the spindle, falling on (or near) the geat train.🙂

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