Headstock runout/vibration

[Steve Blackdog]

Any ideas how to deal with a tiny wobble on the spindle?

I suspect it may have been bent very marginally in use. The bearings have no obvious play.

Although it is only about 0.5mm, if you add a chuck and mid sized bowl, it is exaggerated considerably.

Not sure what else it could be, but I'd not be pleased to replace the spindle to find it makes no difference. It's my perform CCSL by the way. It's been fantastic and doesn't owe me a penny, but I'd like to keep it working if I can rather than bin it.

All the best.

Steve

 

[CHJ]

I take it that it is the same machine referred to in this thread.


If so have you checked that the bearings are still located correctly in the casting, I can't perceive how you would have put enough load on anything to bend the spindle in normal use.

 

[Steve Blackdog]

I take it that it is the same machine referred to in this thread.


If so have you checked that the bearings are still located correctly in the casting, I can't perceive how you would have put enough load on anything to bend the spindle in normal use.

Yes it is, though as the old problem was cured by tightening up the handwheel I thought this was a different problem. But maybe we are back to the old bearing question.

My new lathe arrives Monday, so I will have plenty of time to sort the CCSL without any pressure.

Thanks

Steve

 

[Deejay]

Morning Steve

Before you get the spindle and bearings out, see if the same symptoms are shown if you mount something on a faceplate. If you do, I'd suspect the bearings. I think Chas is right about the spindle not being bent.

If you don't see the wobble with a faceplate, what about the chuck? Some chucks have numbered jaws which must fit on the correct carriers.

I've got a Sorby Patriot, which has 'identical' jaws. They are all made to a tolerance and fitted randomly. I got a chuck with three jaws at one end of the tolerance range and one at the other end, which made one jaw stick out from the other three. Not a huge problem, ( TBH I didn't notice until I got a bit of experience) and all the jaws were probably within the tolerance, but Sorby fitted a new set FOC.

Try a straight edge across the front face of the jaws and see what shows up

Cheers

Dave