Re: [CAD_CAM_EDM_DRO] Re: abrasive wood? was: Lead screws for ever...(plastic)

In a message dated 10/28/2000 10:02:50 PM Hawaiian Standard Time,
chris@... writes:

<< Wood dust abrasive?

Ummmm.

>>

Chris,

Very abrasive. Many hard woods have traces of mineral salts in them (or so
they tell me). We cut Koa, Oak and a few others and boy are they hard on
carbide. Treated woods are worse. We recently ran 8 sheets of fire treated
plywood and wiped out a 1/2" two flute straight cutter every two sheets. And
this is Onsrud cutter stuff. Not the brand X stuff. With those same cutters,
I have cut aluminum for many hours on a bridgeport. No sign of wear here. We
have tried to use disposable diamond but find it chips too easily when you
hit a staple, a small pebble or any other hard item plywood, MDF or particle
board often has in the edges. One day they will develop something that has
reasonable life in wood. Until then, we change cutters at least every few
dozen hours of cutting.

Peter
THRD, Inc.