Reasons
for poles burning defects
1.
Some balls hiding in the blind
corner of the machine can’t be ground normally, then they become big balls. The
big balls in the groove can’t turn on its own axis and pressed by the two edges
of the turning wheel.
2. Some groove is blocked by foreign matters, but not being found and removed in time, then the groove become shallow. When balls come into the shallow groove, it may leads to poles burning defects.
