SK40 Shrink Fit Chuck Standard

Certificate of Quality

Chuck body fine balanced G2.5 at 25.000 rpm or U < 1 gmm
All functional surfaces fine machined
Taper tolerance AT3
Coolant supply form AD/AF

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SK40 Shrink Fit Chuck Standard

Shrink Fit Chuck Standard Version with Cool Jet
DIN ISO 7388-1 SK40 (formerly DIN 69871)

Certificate of Quality

Chuck body fine balanced G2.5 at 25.000 rpm or U < 1 gmm
All functional surfaces fine machined
Taper tolerance AT3
Coolant supply form AD/AF

Shrink Fit Chuck Standard Version with Cool Jet
DIN ISO 7388-1 SK40 (formerly DIN 69871)

Shrink fit chuck suitable to all kind of shrink fit units.

With steep taper SK40 form AD/AF DIN ISO 7388-1 (formerly DIN 69871).
Form AD/AF means: Central coolant supply and coolant channels through the flange which can be sealed again.

Heat resistant hot-working steel
Hardened 54 – 2 HRC
For HSS and solid carbide tools
Shank tolerance h6
With threaded holes in order to balance with balancing screws
Cool Jet coolant bores included Ø6-32 mm
With slits along the clamping bore for cooling from outside Ø3-5 mm
Cooling with Cool Flash for an extra charge
Included in delivery: Backup screw

Technical data subjects to change without prior notice.

Standard version, similar to DIN 69882-8.

Features Shrink Fit Chuck Standard Version with Cool Jet

The most important features:

1. High runout accuracy (< 3 μm)
2. Extreme clamping torque by high pressing in the clamping bore
3. Short chamfer
4. Dynamic form: Reinforced shank at long tool holders. Compromise between slimness (marginal interference contour) and rigidity
5. Cool Jet
6. Threaded bores for simple and fast balancing with screws

Features Shrink Fit Chuck Standard Version with Cool Jet

The most important features:

1. High runout accuracy (< 3 μm)
2. Extreme clamping torque by high pressing in the clamping bore
3. Short chamfer
4. Dynamic form: Reinforced shank at long tool holders. Compromise between slimness (marginal interference contour) and rigidity
5. Cool Jet
6. Threaded bores for simple and fast balancing with screws

Cool Jet for Shrink Fit Chucks

Cool Jet

Optimized coolant bores, aimed at center
Coolant directly to the cutting edge
Extended tool life up to 100%
Higher reliability of cutting process
No more balls of chips on tool

Cool Jet for Shrink Fit Chucks

Cool Jet

Optimized coolant bores, aimed at center
Coolant directly to the cutting edge
Extended tool life up to 100%
Higher reliability of cutting process
No more balls of chips on tool

Cool Flash

Cool Flash (optional)

Optimized coolant bores with coolant outlet through slots
Coolant directly to the cutting edge
Extended tool life up to 100%
No more balls of chips on tool
Optimized runout accuracy! No additional unbalance! No disturbing clearance!
Cool Flash available for shank diameter 1/4" (6 mm) - 1 1/4" (25 mm)

Cool Flash

Cool Flash (optional)

Optimized coolant bores with coolant outlet through slots
Coolant directly to the cutting edge
Extended tool life up to 100%
No more balls of chips on tool
Optimized runout accuracy! No additional unbalance! No disturbing clearance!
Cool Flash available for shank diameter 1/4" (6 mm) - 1 1/4" (25 mm)

SK40 Shrink Fit Chuck Standard Technical Drawing

Clamping Ø D1 [mm]	3
Ø D2 [mm]	10
Ø D3 [mm]	-
L [mm]	9

Order No.

Gage length A in mm

40.440.03

short, 80.00 mm

Without back-up screw, without threads for balancing screws, with slits along the clamping bore for cooling from outside

DXF

Step

Clamping Ø D1 [mm]	4
Ø D2 [mm]	10
Ø D3 [mm]	-
L [mm]	12

Order No.

Gage length A in mm

40.440.04

short, 80.00 mm

Without back-up screw, without threads for balancing screws, with slits along the clamping bore for cooling from outside

DXF

Step

Clamping Ø D1 [mm]	5
Ø D2 [mm]	10
Ø D3 [mm]	-
L [mm]	15

Order No.

Gage length A in mm

40.440.05

short, 80.00 mm

Without back-up screw, without threads for balancing screws, with slits along the clamping bore for cooling from outside

DXF

Step

Clamping Ø D1 [mm]	6
Ø D2 [mm]	21
Ø D3 [mm]	27
L [mm]	36

Order No.

Gage length A in mm

40.440.06.2

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	8
Ø D2 [mm]	21
Ø D3 [mm]	27
L [mm]	36

Order No.

Gage length A in mm

40.440.08.2

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	10
Ø D2 [mm]	24
Ø D3 [mm]	32
L [mm]	42

Order No.

Gage length A in mm

40.440.10.2

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	12
Ø D2 [mm]	24
Ø D3 [mm]	32
L [mm]	47

Order No.

Gage length A in mm

40.440.12.2

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	14
Ø D2 [mm]	27
Ø D3 [mm]	34
L [mm]	47

Order No.

Gage length A in mm

40.440.14.2

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	16
Ø D2 [mm]	27
Ø D3 [mm]	34
L [mm]	50

Order No.

Gage length A in mm

40.440.16.2

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	18
Ø D2 [mm]	33
Ø D3 [mm]	42
L [mm]	50

Order No.

Gage length A in mm

40.440.18.2

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	20
Ø D2 [mm]	33
Ø D3 [mm]	42
L [mm]	52

Order No.

Gage length A in mm

40.440.20.2

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	25
Ø D2 [mm]	44
Ø D3 [mm]	53
L [mm]	58

Order No.

Gage length A in mm

40.440.25.2

short, 100.00 mm

DXF

Step

Clamping Ø D1 [mm]	32
Ø D2 [mm]	44
Ø D3 [mm]	53
L [mm]	58

Order No.

Gage length A in mm

40.440.32.2

short, 100.00 mm

DXF

Step

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