Carbide tip parting on Sieg C3 lathe

[Neil WyattModerator @neilwyatt]

Here's an update on the Arc parting tools.

The next MEW will have some information on them, but after getting hold of the tool block holder for the 'blade' NCIH that Ketan was demonstrating, I finally tried it out today, too late for the magazine.

These are unhappy if you don't make them work hard.

618 rpm, winding in almost as fast as I could, about 1 1/2 seconds per turn (40 thou), which is about as fast as I can manage, and it went through EN1a (non-pb) like butter and left a mirror finish.

If you have these inserts DON'T pussy-foot about.

Neil

Edit: Added photo, which as always makes the surface finish look poorer than it really is, it feels perfectly smooth! NB – this was done on my mini lathe.

Edited By Neil Wyatt on 08/04/2016 20:28:01

Edited By Neil Wyatt on 03/05/2016 14:45:45

[Nick HulmeParticipant @nickhulme30114]

Posted by Ajohnw on 03/04/2016 11:08:06:

I've been playing with a mini lathe recently. One factor I have noticed is that even when turning once chatter starts it may not be possible to get it to go away.

When you get chatter, stop, back off, lube and re-try, if chatter persists change your cutting speed, try a dropping the speed, but sometimes you need to increase it, once you get the feel for it what's required will kind of come to you,

– Nick

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