Printed circuit board drill and method of manufacture

Details Printed circuit board drill and method of manufacture Printed circuit board drill and method of manufacture

B - Operations, Transporting

23

B

77/35

B23B 51/02 (2006.01) B22F 7/06 (2006.01) B23P 15/32 (2006.01) H05K 3/00 (2006.01)

Patent

CA 1233347

A B S T R A C T An abrasive tipped drill of .006 to .125 inch diameter is provided for drilling holes in printed circuit boards. A composite sistered abrasive tip of cemented carbide and diamond or cubic boron nitride is formed such that the carbide can be ground away to expose the abrasive as the cutting surfaces of the drill. A shank of tough material having high transverse rupture strength is provided with a reduced section which forms the body of the drill. The tip is secured to the reduced section and flutes are ground over the combined length of the tip and reduced section.

457962

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