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KM8220 CCMT 060204 Pilot Insert
80° Rhombic
Rhombic CCMT06, 09 and 12 inserts with four helical cutting edges.
For medium conditions.
"Pilot" is used for the purpose of correcting the feed error immediately before carrying out the cutting.
A pilot is basically a round hole, and the error is corrected by inserting a shaft with a pointed tip (a pilot punch) inside this hole.
There are two methods of using the hole