Re: [CAD_CAM_EDM_DRO] Re: collets

Hi Marcus,

EDM sounds like an interesting idea, I hadn't thought of that. Apparently,
the commercial makers use a method very similar to yours - except they rely
on a very stiff short drill instead of boring the hole to size. The collet
hole is first opened up from the back to leave just a short section to be
bored to size and the slots are cut with a normal slitting saw until they
are close to but not into the bore. Then the last bit of the slots is cut
using a paper disk and abrasive. The most difficult part is hardening and
tempering evenly so that the jaws don't spring to one side when the slots
are cut right through.

Ian
--
Ian W. Wright
Sheffield UK
www.iw63.freeserve.co.uk

----- Original Message -----
From: "Marcus & Eva" <implmex@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: 14 November 2001 06:30
Subject: Re: [CAD_CAM_EDM_DRO] Re: collets


> Hi Ian:
> At 0.2mm (0.0078") she's gonna be a tricky one no matter how you slice
> 'er.
> If you can make the weeny little hole accurately, and if you can find a
saw
> skinny enough to cut the slots, you will have my