Thread: wl 46 not running true?

I was referring to the female of the chuck btw.

If your run-out total is say 10 thou, that's only 5 thou deviation from centre (Thanks for the lesson GJ).

Noticeable but not material for faceplate work unless you want to eg remount a foot for more turning, in which case you'll in many cases get more deviation from centre from other causes.

Is it possible that the thread has been cut with a die and not on the lathe? It might be possible to remount the shaft in a lathe and touch up the threads properly (as well as the mating faces). This will remove material from the face of the threads and you would have more backlash inside the insert, but at least it would be true and should not weaken it noticably if done carefuly.

Grumpy John would be able to give a more expererienced opinion on this one.

good luck.

Just to give a final update on how I got the chuck running nice and true...

Its a bit of a cringe effort but it seems solid and been working all afternoon with no issues still running true.

I took some plumbers tape that they use to prevent taps from leaking and wound it around nice and tight on the headstock thread and whacked the insert over the top it was a nice snug fit now and I was actually damn surprised to see it all ran very true.