DIN 69893-1 | HSK-A63/A100
With its gripping and locating groove Form A hollow shank tapers are a preferred type for automatic tool change in machining centers. Manual operation is possible through the access-hole in the taper. Torque is transmitted both positively and non-positively. Well-suited for HPC-operations, as well as for HSC. High-frequency tool holders are all fine balanced to G2.5, 25000rpm ~ 12000 rpm.
General rotation speed limits for DIN hollow shank tapers:
 

(The rpm limits were recommended as guideline values. No liability can be accepted for these specifications. HSC-operations only under optimal machining conditions, i.e rigid machines, sufficient coolant supply, rigid workpiece and tool clamping are highly recommended. Depending on the tool, it may be necessary for these maximum speeds to balance the tool holder and the tool together.)

HSK-A | DIN 69893-1 Hollow Shank
HSK-A D D2 max. L F M B3 B1 B2
63 63 53 32 26 M18x1 12.54 18 16
100 100 85 50 29 M24x1.5 20.02 22 20
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