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21GENERAL DRILLING HANDBOOKHole ShapeDrills can be classified by the shape of the holes they create such as cylindrical, tapered, or stepped.Cylindrical Hole Tapered HoleStepped HoleDrillCutting PartMajor CuttingEdgeFlute Round ShankSolid Drill GeneralPurpose DrillCylindricalHoleDrill with Tapered HoleIndexableInsertsSide LockShankSpiralFluteV BottomWhistle NotchShankStraightFluteFlatBottomSelfCenteringOther ShankTypesCentering DrillSpot DrillDeep DrillStepped DrillDrills with Stepped HoleExchangeableHeadsClamping Part DesignConfigurationApplication Hole ShapeDrill Classifications
