Re: [CAD_CAM_EDM_DRO] Re: Slot drills

Jan,

I've been using the cheap carbide PCB drill bits too. I just cut out some
parts from .080 aluminum with them and they work great. I've used them
as 1/16" router bits in wood, MDF, and high density foam. Even cut some
stainless steel with them. The best part is at about $10.00 for qty of 50
when I break them I don't even flinch, just get another one. Here is a link
to one of his sales on ebay for anyone who's interested.

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1664991921

Bill


I bought 100 PCB-drill- bits (solid-carbide, of course) on e-bay for a very
low price, and was a bit surprised when they arrived: They are clearly
spiral "up-cutting" two-flue mill-bits, with a 140° center-cutting tip, much
like a drill-bit, only "flatter". They drill into FR-4 (that's PCB
fiber-glass epoxy, to those of you who don't know), and can "mill" sideways
very well, like a "router-bit", if turning over 3000 RPM, that is! So, they
are TRULY "slot-cutting drills". They work excellently on aluminum-sheet,
being two-flute. One lives and learns...