Gallery, Projects and General > How to's
Finding tool centre height on a lathe
NickG:
I use the tail stock too but think will change to one of these more accurate methods.
:offtopic: 28ten, your trouble parting off is likely to be a general lack of rigidity with the small lathe etc. People have had good results though when changing the bearings for taper roller bearings. Isn't there some rear tool post mod for the mini lathe too?
Nick
bogstandard:
--- Quote ---Indexable bars probably just have the flats milled at a convenient angle for the minimum hole size.
--- End quote ---
My indexables have flats machined on them to put the tip at that angle.
But getting back to the point of the posting, that is why the scribed line is used, rather than the fixture that you raise the tooling up to. The scribed line can cope with any eventuality, including tools that are mounted upside down, left hand, right hand, WHY.
Bogs
NickG:
The scribed line is definitely what I'll be doing when I get the QCTP.
I guess I could even do it before that, just use one of the angled HSS holders with a tool bit I only use for scribing the line. I would have to make sure I clamp it totally flat each time though.
AndyB:
Hi all,
thanks for the great idea Bogs; as always, I am in awe of the simplistic way you teach...and the amount I learn from you (I am a novice to all this)!
The way I set to centre height is by using a sharp centre set in the tailstock and lining my cutting edge/point to that. I can back up my eyesight with feel with a finger.
Maybe it is a bit easier on old Drummond lathes like that...
krv3000:
HI all ? parting off i never have aproblem keep the cut wel lubrecated ie for s/s and steel and the feed at a stedy rate regards bob
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