GBP 57 The hollow shank interface HSK − Forms and features ▶Note: See page 938 for information on ISO taper (SK) − interfaces. Taper hollow shanks for automatic tool change With tool gripper groove ISO 12164-1 (DIN 69893-1 Form A and Form T) DIN 69893-2 Form B DIN DIN 69893 69893 ■ Used for machining centres, milling machines, ■ Used for machining centres, special machines with automatic tool change. heavy duty milling machines, lathes. ■ Pipe for central axial coolant feed. ■ With enlarged collar and position notch. ■ Torque transmission by 2 driving slots at the end of the taper. ■ Decentralised coolant supply via the collar or central supply via the coolant pipe. For Form T, the tolerance (dimension b5) is narrowed. ■ Torque transmission by 2 collar grooves. ■ 2 collar grooves for tool magazine, positioning notch. ■ Bore for data carrier DIN 69 873 in the collar. ■ Bore for data carrier DIN 69 873 in the collar. Taper hollow shanks for manual tool change ISO 12164-1 (DIN 69893-1 Form C) DIN 69893-2 Form D DIN DIN 69893 69893 ■ Preferred for use on spindles in transfer lines ■ Used in all areas which require a large flat face for even and special machines without automatic tool change better support during manual tool changing. or stub drill spindles and tool extensions / reducers. ■ With enlarged collar. ■ Central axial coolant feed. ■ Decentralised coolant supply via the collar or central supply via the coolant pipe. ■ Torque transmission by 2 driving slots at the end of the taper. ■ Torque transmission by 2 collar grooves. Taper hollow shanks for higher speeds (HSC) With tool gripper groove Prelim standard (DIN 69893-5 Form E) E-DIN 69893-6 Form F DIN DIN 69893 69893 ■ Used for high frequency spindles, woodworking machines. ■ With reduced taper. ■ Rotationally symmetrical, without any driving slot. ■ Central coolant supply possible via a through hole – no thread ■ Torque transmission by friction. for coolant pipe ■ Pipe for central coolant feed. The HSK interface has the following advantages compared to the ISO taper: Material: ■ High repetition accuracy when changing tools. ■ Special steel for highly stressed components. ■ Fixed axial positioning due to flat face. ■ Surface hardness: 58 − 62 HRC. ■ Suitable for high-speed cutting. ■ Tensile strength at core at least 1000 N/mm2. ■ No pull-studs required. Shape A f3 l6 Shape E f3 l6 (HSK-T) 60° 7 60° 30° 30° d5 d5 d12 d1 d11 d10 b1(b5 = HSK-T) d2 d12 d1 d11 d10 d2 f1 f1 f2 l1 f2 l1 30 HSK b1 ± 0.04 b5 ± 0.035 d1*) h10 d2 d5 H11 d10 max. d11 -0.1 d12 -0.1 f1 -0.1 f2 min. f3 ±0.1 l1 −0.2 l6 JS10 32 7.05 6.932 32 24.007 20.5 26 26.5 37 20 35 16 16 8.92 40 8.05 7.932 40 30.007 25.5 34 34.8 45 20 35 16 20 11.42 50 10.54 10.425 50 38.009 32 42 43 59.30 26 42 18 25 14.13 63 12.54 12.425 63 48.010 40 53 55 72.30 26 42 18 32 18.13 80 16.04 15.93 80 60.012 50 68 70 88.80 26 42 18 40 22.85 100 20.02 19.91 100 75.013 63 88 92 109.75 29 45 20 50 28.56 *) Nominal ⌀ d1 = collar ⌀ 1004