Nine9 20 i-Center Indexable Centre Drill Insert (I9MT2004R0630-NC2033), R Type, 6.3mm Pilot by NINE9

World's first indexable center drill. Shortens set up and center drilling time. Increases tool life and reduces tooling costs. The special ground insert and rigid holder design facilitate high performance speed and feed rates. The positioning and repeatability of the insert is within 0.02mm(.0008") in radial direction, thus enfuring conformity to any national standards. The axial position of the insert is 0.05mm (.002"). It is not necessary to reset the tool length when changing the insert edge. Coolant can be supplied through the center of the holder to increase performance and extend tool life. Insert geometry, grades and coating process are specifically engineered for centering applications.