[modeleng] Re: Drilling quartz
- From: Roger Mason <roger.g3tdm@xxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Sat, 16 Oct 2004 09:38:30 +0100
Hi,
Ronald asked:
>I want to mount a model on to a large piece of white/grey marble I need to
>know the method used to drill it
>
In my experience marble is comparatively soft. I have drilled it
with normal HSS drills, however the edge is removed after a bit!! If
you use carbide tipped drills they need to be re-ground to present a
sharp cutting edge, not the much stronger rounded edge they seem to
have straight from the manufacturers. A slow speed is best, as a fast
speed will just wear the cutting edge away. Also do not use the
hammer facility normally used to "drill" into hard substances.
I have seen marble turned with ordinary tipped tools. A chap I
used to know who made all sorts of things from marble used no special
tooling to fashion it, except a very large diamond tipped circular saw
to cut up enormous chunks of it - powered by a 200 h.p. lorry engine!!
I hope this helps - but probably just confuses!!
Cheers,
Roger Mason, in St. Agnes.
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