A rotary cutting tool has a cutting insert clamped from behind by a backingclampagainst a frontal abutment defined in the body of the rotary cutter head. Theclamp backs the cutting insert against the cutting pressure during operationandprovides for the use of a same rotary cutter with different profiles ofcuttinginserts. Plugs of predetermined weight can be inserted in pre-formed holes inthecutting insert to permit recalibration of the insert after a sharpeningoperation.
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