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Tool clamping \ Tool chucks ISO 7388-1 SK 40/50
CNC precision short drill chuck (ISO 7388-1)
With spur gear mechanism

SK Form Form G 6,3 ISO
40 AD A IK R/ L 25000 rpm 7388-1
Application: ƒ With worm gear mechanism
Ident. No. 540: For use on machining centres and CNC milling machines with ƒ Type A with steep taper, no internal coolant feed
tool change. For drilling, reaming, countersinking and also light milling and
smoothing tasks. Advantage:
Ident. No. 550: For use on machining centres and CNC machines with tool ƒ Ident. No. 540: Remains securely clamped even with sudden spindle stop
changer. ƒ Ident. No. 550: remains securely clamped even with sudden spindle stop
Execution: Delivery:
ƒ Ident. No. 540: Wear parts hardened and polished Ident. No. 540: with hexagon key
ƒ Ident. No. 550: Ident. No. 550: With hexagon key
ƒ 100% concentricity check using different test pin diameters at various meas- Notes:
uring points, based on DIN ISO 10888
ƒ Concentricity tolerance ≤ 0.03 mm over entire clamping range The previous standard DIN 69871-1 was replaced by ISO 7388-1.

C D
C D
A
L1 max A
L1 max
Ident. No. 540 Ident. No. 540 Ident. No. 550 Ident. No. 550
Ident. No. 540 Ident. No. 540
Sealing washer ATORN 16 Sealing washer ATORN 16
(Ø 4.2 mm) (Ø 2.05 mm)

p. 734
Tool holding Min./max. A (mm) Length, open D (mm) L1 (mm) Coolant supply Concentricity 21329...
device clamping width (mm) tolerance (mm) Ident. No.
SK 40 0.5-16 mm 90 103 57 103 Yes 0.020 540 ●
SK 40 0.5-16 mm 90 103 57 103 No 0.020 550 ●
Prod. Gr. 208
Compatible pull studs no. 23690 130-150 page 732
Short drill chuck (ISO 7388-1)
Self-clamping

SK SK Form G 6,3 ISO
40 50 A R 12000 rpm 7388-1
Application: ƒ In the event of a sudden spindle stop, the cutting
For drilling and centring. tool cannot work loose
Execution: Delivery:
ƒ Precision design With special key
ƒ Clamping force increases automatically and Notes:
proportionally to the torque The previous standard DIN 69871-1 was replaced by
Advantage: ISO 7388-1.
ƒ Quick clamping via clamping sleeve, with two
clamping surfaces for doubling the clamping force C D
with a spanner

A

p. 734
Tool holding device Min./max. clamping width A (mm) D (mm) Coolant supply 23050...
Ident. No.
SK 40 1-13 mm 86 50 No 740 ●
SK 40 2.5-16 mm 110 57 No 745 ●
SK 50 3-16 mm 90 57 No 750 ●
Prod. Gr. 295
Compatible pull studs without internal cooling no. 23692 130-150 page 732

Source: Hahn+Kolb Werkzeuge GmbH
Technical data subject to change. www.iconridge.com 713
Availability subject to country specific rules and regulations.