Standardised to DIN 69893
No retention nob
Smaller (ca. 30%) and lighter (ca. 50%) than the steep taper (SK)
Faster and easier tool change
Rigidity 5 to 7 times higher than with steep taper holders due to
support on the tool holder over the collar
Force-closing due to the taper and contact surface
Form-closing by means of drive slots
Excellent change accuracy (3 µm)
Face contact on collar ensures axial wobble accuracy
Close taper tolerance minimises radial run-out
HSK-C has a shorter shank with a flatter taper angle