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Old 7th Dec 2019, 11:21 pm   #19
Terry_VK5TM
Octode
 
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 1,326
Default Re: PCB Artwork transfer

Proper pcb drill bits are indeed tungsten-carbide and break very easily.

Used at very high rpm (my CNC drill is 25,000rpm) and must be sharp, as soon as they loose their edge, they will start lifting the edge of the pads.

They also have 3.18mm (1/8") shanks.
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