Annular Cutter
Annular Cutters drill a burr-free hole by cutting around the hole and ejecting the center as a usable slug. Annular Cutters require far less horsepower than twist drills of comparable size when run at the same feed rate. As a result, cutters can be run at higher feeds with higher metal removal rates while horsepower requirements are not increased

The geometry of Annular Cutters is such that far less material is converted into chips than when using twist drills.

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