29 Aug
2007
29 Aug
'07
3:15 p.m.
and not end up
the size or shape you expect.
Actually is fairly easy once you know how. You need a lathe and a rotary
grinder with the right wheel (correct abrasive). Rather than using the usual tool (cutting edge) you apply the grinder
mounted on the cross peice
so than you abrade away the urethane, silicone rubber or whatever flexible
material is used. The process is slow but with care you get excellent
results. Learned than from a machinest that was really good.
It works very well (and it's usef for getting very accurate results on
metal too, you can take a much finer cut with a toolpost grinder than you
can with a normal lathe tool).
Apart from the cost, the other disadvantage is that abrasive dust goes
everyway, including into the 'ways' of the lathe. If you don't clean it
out very carefully, you will do a lot of damage.
-tony