Gallery, Projects and General > How do I??

Threaded spindle reverse

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ieezitin:

Hello lads

Has Anyone on here come up with a way to have a threaded back plate on a threaded spindle and fix it so it don't turn off when reversed, if so how did you overcome this problem.

Thanks


Anthony.

mexican jon:
Many years ago I milled a small flat into the threads on the nose and drilled the back plate to fit a grub screw  :loco: Now I don't know if this was a good idea or not but it worked and didn't seem to effect the accuracy when a normal chuck was refitted. :thumbup:

seadog:
The chuck is located on the plain register, so provided it's not a sloppy fit then I suppose a flat on the thread won't matter. It depends on the lathe as to how you can achieve this. On the Boxford, for example, it's possible to reduce the thickness of the spindle bearing cover plate to expose  a plain section of the spindle. You can then fix a split collar to the back of the chuck back plate which then clamps around the spindle. There was mention of this on the Boxford Users' Group recently.

Pete.:
Spin it on fast and let it slam against the shoulder :thumbup: :thumbup: :thumbup:

philf:
We had a Simonet instrument lathe at work and all the chucks and faceplate had a loose split collar which applied a bit of squeeze of the backplate onto the register. You couldnt budge them without undoing the collar.

Phil.

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