Dear friends,
We are facing a problem in PCB drilling.
During inspection of the drill bits after the drilling process, we are
observing a chip off in the drill bits.
In some drill bits it is at the cutting lip of the drill bit. In some drill
bits it is in the primary face of the drill bit web.
We have observed the problem in the drills from both the drill suppliers
that we have.
Another problem is the used drill bits have a severe negative flair, in
some cases it is as high as to
give a triangular appearance to the drill bit primary instead of the normal
rectangular appearance.
We have even observed the clogging of dust and entry material coils in the
flute of the drill bits.
We are looking into the causes of these problems but with little success.
Any feedback from the technet members will be highly appreciated.

Warm regards,
Swati Parial
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