
HSK (hollow taper shanks) Term definitions of HSK-A interface for automatic tooling systems Gripper groove: circular groove Index notch: sickle-shaped notch across gripper groove K eyway on collar: index notch or for attachment in tool magazine or grippers. With HSK-B/D also provides form closed torque transmission to spindle. C oding/identification: bore in collar for attachment of identification system (coding chip) T hread for coolant: for attachment of coolant supply set K eyway on taper shank: form closed torque transmission to spindle R adial bore in taper shank: necessary for manual clamping systems C lamping shoulder: circular chamfer for drawing in the tool P osition of the tool edge of single-edged tools 14 2020 14.32