HSK-A63
Hollow-shank conical clamping interface, 63 mm size, DIN 69893 standard. Market standard for high-speed machines.
HSK-A63 is the dominant interface in modern machining centers (HSC, HSK = Hohlschaftkegel). Advantages vs SK/BT: double contact (taper + face), axial rigidity, quick change, 1–3 µm repeatability.
The Hanna HR® system is delivered in HSK-A63, HSK-A100, SK40, BT40, and Capto.