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Re: Do these diamond burrs suck?

2005-12-12 by soffee83

Thanks for all the replies!

Yes, I am actually using a drill press (a smaller Delta). I can't 
imagine doing some of these boards by hand. I usually have a solid 
backer board to keep the exit side clean too. I'm also thinking of 
sticking a pulley and cord on the ceiling and hooking it to a bass 
drum pedal or something to lower the quill, so I can use both hands. 
The drive belt usually stays on the lowest speed.

The dental burr recommendation originally came from some usenet or 
website discussions about longer lasting bits for PCB work. The Dremel 
burr made decent cuts while it lasted, but from what you guys have 
said, I probably just got lucky on the style of cutting edge they used 
or something.

If anyone knows an eBay dealer,etc. who normally sells the large 
quantity of one size (like Stefan mentioned), I'll probably be 
shopping. I've looked before, but I didn't really know the standard 
size (for resistor type holes) and most of the deals were for 
assortments. I've got two decent sized cases of the "#" valued bits in 
just about every size under 1/4", but I've eaten up the first few 
small ones in both sets. I should be fine for all the regulator type 
sizes up.

BTW- Some other info also recommended HSS against carbide stating that 
the carbide was brittle enough to snap frequently on PCB's. They said 
to go with a quantity of regulars and just replace them every so 
often. Going by info here, I guess carbide is a decent choice 
afterall. I'll still probably want a lot either way.

         Let me know if there's any shopping pointers.

-Thanks!

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