SK30 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

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SK30 Shrink Fit Chuck Standard

Shrink Fit Chuck Standard Version
similar DIN ISO 7388-1 SK30 (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

Shrink Fit Chuck Standard Version
similar DIN ISO 7388-1 SK30 (formerly DIN 69871)

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

With steep taper SK30 DIN ISO 7388-1 (formerly DIN 69871).

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
Cooling with Cool Jet for an extra charge
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

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 (on request)
6. Threaded bores for simple and fast balancing with screws

Features Shrink Fit Chuck Standard

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 (on request)
6. Threaded bores for simple and fast balancing with screws

Cool Jet for Shrink Fit Chucks (optional)

Cool Jet (optional)

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 starting from shank diameter 1/4" (6 mm)

Cool Jet for Shrink Fit Chucks (optional)

Cool Jet (optional)

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 starting from shank diameter 1/4" (6 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)

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)

SK30 Shrink Fit Chuck Standard Technical drawing

Clamping Ø D1 [mm]	3
Ø D2 [mm] ultra short	10
Ø D2 [mm] short	10
Ø D3 [mm] ultra short	-
Ø D3 [mm] short	-
L [mm]	09

Order No.

Gage length A in mm

30.445.03

ultra short, 60.00 mm

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

DXF

Step

30.440.03

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] ultra short	10
Ø D2 [mm] short	10
Ø D3 [mm] ultra short	-
Ø D3 [mm] short	-
L [mm]	12

Order No.

Gage length A in mm

30.445.04

ultra short, 60.00 mm

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

DXF

Step

30.440.04

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] short	10
Ø D3 [mm] short	-
L [mm]	15

Order No.

Gage length A in mm

30.440.05

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] ultra short	23
Ø D2 [mm] short	21
Ø D3 [mm] ultra short	-
Ø D3 [mm] short	27
L [mm]	36

Order No.

Gage length A in mm

30.445.06

ultra short, 60.00 mm

Without threads for balancing screws

DXF

Step

30.440.06

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	8
Ø D2 [mm] ultra short	23
Ø D2 [mm] short	21
Ø D3 [mm] ultra short	-
Ø D3 [mm] short	27
L [mm]	36

Order No.

Gage length A in mm

30.445.08

ultra short, 60.00 mm

Without threads for balancing screws

DXF

Step

30.440.08

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	10
Ø D2 [mm] ultra short	27
Ø D2 [mm] short	24
Ø D3 [mm] ultra short	-
Ø D3 [mm] short	32
L [mm]	42

Order No.

Gage length A in mm

30.445.10

ultra short, 60.00 mm

Without threads for balancing screws

DXF

Step

30.440.10

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	12
Ø D2 [mm] ultra short	27
Ø D2 [mm] short	24
Ø D3 [mm] ultra short	-
Ø D3 [mm] short	32
L [mm]	47

Order No.

Gage length A in mm

30.445.12

ultra short, 60.00 mm

Without threads for balancing screws

DXF

Step

30.440.12

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	16
Ø D2 [mm] ultra short	30
Ø D2 [mm] short	27
Ø D3 [mm] ultra short	-
Ø D3 [mm] short	34
L [mm]	50

Order No.

Gage length A in mm

30.445.16

ultra short, 65.00 mm

Without threads for balancing screws

DXF

Step

30.440.16

short, 80.00 mm

DXF

Step

Clamping Ø D1 [mm]	20
Ø D2 [mm] ultra short	35,5
Ø D3 [mm] ultra short	40,5
L [mm]	52

Order No.

Gage length A in mm

30.445.20

ultra short, 70.00 mm

Without threads for balancing screws

DXF

Step

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