SuperNova Chuck Insert

[GeordieTurner]

I have bought a SuperNova (original not 2) which is 11/2” x 8tpi thread, can I fit an insert to convert to M33x3.5? I have read that the fixed thread SuperNova chucks cannot accept an insert, if possible who would be best supplier. Many thanks

 

[CHJ]

There is no chance of fitting an INSERT in a 1-1/2" thread to accommodate a 33mm thread. (not enough difference in diameter)

Might be possible for someone to machine the chuck body out to accept a new sleeve that can be machined to 33mm standard, depends upon there being enough material in the chuck body, but cost would be more than the chuck is worth in most instances.

May be possible to find an EXCERT adaptor to place between the spindle nose and the chuck.
Penalty being that it would project the rear of the chuck at least 50mm forward of the existing spindle nose.

 

[Phil Pascoe]

https://www.turners-retreat.co.uk/exert/p2688
might be the one.

 

[Paul Hannaby]

You can buy a thread adapter off the shelf here www.onewayeuropa.com/lathes/2436_access.htm look near the bottom of the page.

As Chas said, it will extend the chuck further from the headstock.