HSK TOOLING SYSTEM
HSK A … HSK40A, HSK50A, HSK63A, HSK100A
HSK A shank is based on ISO12164-1 （ DIN69893-1 ） and Hollow Shank Taper with 1/10 Taper and Double Contact System of Taper & Flange. Its dimension is unsymmetrical shape such as; - Depth of Drive Keys Slots are different. - Width of U Groove are different. - V Notch on one side. 1.It's not well balanced due to above unsymmetrical shape, therefore NIKKEN HSK A Shank has a hole and a flat for mass balancing as standard.
Small
Hole for Balancing
V Notch
Flat for Balancing
Short
φ D
Wide
Long
2. Hole for manual clamp is not standardized for the size smaller or equal to HSK50A . HSK63A and HSK100A tools without a hole for manual clamp are also available for high speed application. 3. Hole for ID is not standardized for all models. 4. HSK tool is clamped to the main spindle with clamping force more than about 2 times of BT tool by intensifying clamp mechanism.
1/10 Short Taper
Clamping Force
Coolant pipe
TAPER Clamp Force
HSK40A 6.8kN
11kN 45kN HSK50A HSK63A HSK100A 18kN
Flange Contact
5. A big clamping force and the double face contact system of 1/10 short taper & flange largely improved the static stiffness as the tool interface. 6. Higher repeatability of ATC is accomplished due to the run-out accuracy of contact flange for taper is within 0.002mm.
Repeatability of ATC
Repeatability
TAPER HSK 25
L 40 50 60 75
Y
Z
X
Drive Key
Y
Y
Intensifying Clamping Mechanism （ Expanding of Internal Collet System ） HSK Double Face Contact System 32 40 50 63 100 HSK E & HSK F … HSK25E, HSK32E, HSK40E, HSK50E, HSK63E, HSK63F 100 150 0.002 0.002 0.002 HSK-E type & HSK-F type holders are for High Speed Application and are manufactured to DIN69893-5 & -6 standard. The configuration of the holder is different to that of HSK-A type, the holder is designed symmetrically without drive key slots, U-groove, V-notch, holes in the taper for manual clamping and hole for I/D chip. The tool flange diameter of HSK-E & -F are the same, but the taper size on HSK-F is one size smaller than HSK-E . TCL-GH clamper is designed for symmetrical holders without drive key slots or U- groove. The TCL-GH clamper is also suitable for the other shank tooling with same flange diameter as E & F type. P.298
Z
X
L
HSK50E HSK63F
Caution ・ Always ensure that swarf does not attach at the spindle flange surface, because of the double contact system. Generally the inside of the machining envelope is always covered swarf. This means that there is a possibility that the flange of the tooling may collect swarf easily at the ATC. It is therefore important that the machining envelope is regularly cleaned （ Clean the ATC arm, the route through which the tooling passes, the tool pot and the spindle surfaces etc. ） at least every 3 months. ・ Always ensure that M/C has the mechanism to confirm the perfect flange contact. ・ Always ensure that M/C has the mechanism to clean the spindle flange surface.
R8
R4.5
S/HSK40A
S/HSK63A
6
12
21 10 12
10
18.13
18
11.42 8 8
11
12.5
8.05
4
TAPER ： 1/10
11
6.3
TAPER ： 1/10
18
20
20 20
32
26 16
R4.5
R8
6
12
21
10
227
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