How much runout is normal?

Hi there,

I removed the D1-4" CamLock chuck from my typical chinese import lathe today and measured the runout on the taper nose and the mating plate. I measured about 0.01mm on both. Is this normal or is there something I can do to improve it?

Here's the measurement: https://www.youtube.com/watch?v=d02_FN2AsXM


Cheers,
Alex

Hi guys,

I've tightened the preload on the main bearings as per this picture:

Attachment 259810

The runout on the plate is now almost not measurable, however the runout on the taper nose is unchanged. See video:

https://www.youtube.com/watch?v=Qiy7uboBSg0

Any ideas where to from here?