In the case of high frequency of chipping, there
is a possibility to create an unevenness of hole quality, therefore
this should be controlled. However in our tests we found no
serious effect on registration accuracy and roughness.
Chipping
Countermeasure
(Setting of drill point)
1. Pay attention to handling
Use putty to remove dust.
2. Dress the primary wheel.
Use a suitable dressing stick to dress the
primary grinding wheel.
