Use a 32° cutter to clear 1/4 of external end of race.
Use a 60° cutter to clear 1/4 of bottom of race.
Remove the cutter and check the processed locations.
Use a 45° trimming cutter to grind the race so that it
meets the suitable width.
Make sure all caves and unevenness are eliminated.
Standard race width: Intake: 1mm
Discharge: 1mm
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