Electronics > Beginners
PCB Drilling
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xavier60:
I had not been able to use tungsten carbide  bits with my Dremel rotary tool due to too much runout.
The photo shows a modified collet. I use it with the cable drive adapter nut which has been bored out to 1/8"plus clearance.
The runout is very small now.
Domagoj T:
Yeah, when using carbide, low runout is essential due to the brittleness of the bits. Also, the setup needs to be stiff enough and not flex when drilling, otherwise the bits will snap immediately. Hand drilling is not really feasible with small bits we use for PCBs.
rx8pilot:

--- Quote from: xavier60 on May 03, 2019, 12:30:21 am ---I had not been able to use tungsten carbide  bits with my Dremel rotary tool due to too much runout.
The photo shows a modified collet. I use it with the cable drive adapter nut which has been bored out to 1/8"plus clearance.
The runout is very small now.

--- End quote ---

That is a cool hack - the DIY market needs some low-runout Dremel hacks.
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