Turning hard materials

[Neale]

I've been resisting the temptation to buy one of these for a while:

http://www.ebay.co.uk/itm/1000W-ZVS-...4AAOSwcu5URhOk

Perhaps I should stop resisting....

I gather that you've used the annealing method yourself - how did you heat the ballscrew, and do you think that there was any distortion? Was it machined out if so? I now have a lathe with a big enough spindle clearance for ballscrew machining, and trying to make sense out of the various sources of "advice" available via Google...

[Jonathan]

I gather that you've used the annealing method yourself - how did you heat the ballscrew, and do you think that there was any distortion? Was it machined out if so? I now have a lathe with a big enough spindle clearance for ballscrew machining, and trying to make sense out of the various sources of "advice" available via Google...

There are some pictures of one I did here - got a bit carried away with the heating, but I didn't notice any distortion - neither did I check carefully if I'm honest.

http://www.mycncuk.com/threads/4497-...0297#post30297

I used my Mum's cooker to heat it - it's a gas hob. Better off using something with a bit more power output though.