Single Flute Gundrill
Over view
Cutting geomerty
Bearing & Guide pad
Two Flute Gundrill
Stepped Gundrill
Gundrill Accessories
BTA Drill
BTA Drill Tube
Gundrill Repair
  SF gundrill's cutting amount per rotation is more 30 percent than Single Flute gundrill because groove of SF gundrill does a role of chip breaker with interaction of blade and groove.
But it has defect such as high rubbing and is not suitable for the good surface machining.