Hi folks,
I've just picked up a Dremel Multipro 285 (the two-speed 10kRPM/33kRPM
model with a collet chuck - £35 at B&Q). It seems I've got a good one - the
drill bit is visibly more stable in comparison to my old drill, and even at
33,000RPM I can't see any vibration at the tip of the bit (IIRC it's called
runout - how do you measure it, anyway?).
My last drill - an Expo Reliant - had an absolutely dire keyless chuck. The
chuck is now so full of dust, dirt and FR4 that it no longer works
properly - hence the replacement. Well, that's my excuse anyway.
I even managed to drill a few holes by hand with a 0.8mm tungsten-carbide
bit. I would never in a million years have gotten away with doing that with
the Reliant...
I'm not sure how well it'll handle linear loading, but my guess is "not too
badly" seeing as it came with a carborundum disc attachment... I may be
tempted to get a flexible drive shaft and use that with the cutter, if only
to save putting too much stress on the bearings in the tool.
Now all I need to do is modify my old drill stand to take the Dremel.
That's going to be a "fun" job... Let's see, Polymorph, cable ties and a
cordless drill. Fun! :)
But thank %DEITY you don't need holes for surface-mount.. Except for the
vias. And the components that are only available in through-hole. D'oh, just
can't get away from them holes...
Later,
--
Phil. | Acorn RiscPC600 SA220 64MB+6GB 100baseT
philpem@... | Athlon64 3200+ A8VDeluxe R2 512MB+100GB
http://www.philpem.me.uk/ | Sony MZ-N710 NetMD Minidisc
... 24 hours in a day and 24 beers in a case. Hmmmm.....