SK50 Shrink Fit Chuck Power Shrink Chuck

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
Cool Jet, can be sealed

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SK50 Shrink Fit Chuck Power Shrink Chuck

Power Shrink Chuck
DIN ISO 7388-1 SK50 (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
Cool Jet, can be sealed

Power Shrink Chuck
DIN ISO 7388-1 SK50 (formerly DIN 69871)

Shrink fit chuck suitable to all inductive shrink fit units.

The Power Shrink Chuck is the shrink fit chuck for highest machining capacity in high-speed manufacturing. The optimized design combines high rigidity with dampening vibrations, therefore giving more protection to machines, spindles and tools.

Increased machining capacity due to higher spindle speed, higher feed and larger cutting depth
Shorter processing times
Quieter running, therefore better surface quality and protection of tools, spindles and machines
Higher machining accuracy
With threaded holes in order to balance with balancing screws
Cool Jet bores that can be sealed included
Cooling with Cool Flash for an extra charge

The long versions (A = 160 and 200 mm) with slim tips are especially versatile to use.

High rigidity
Slim at the tip
Dampen vibrations
High clamping force
Equally suited to high-speed manufacturing and heavy milling
Universal usage, saves space in tool magazine

Technical data subjects to change without prior notice.

Features Power Shrink Chuck

The most important features:

1. High runout accuracy (< 3 μm)
2. Low tendency towards vibrations by optimised outer geometry
3. Slim design at the top
4. Very rigid shank
5. Standard with Cool Jet (can be re-sealed)
6. Dirt groove in the clamping bore for safe clamping force
7. Safe-Lock™ (optional)

Features Power Shrink Chuck

The most important features:

1. High runout accuracy (< 3 μm)
2. Low tendency towards vibrations by optimised outer geometry
3. Slim design at the top
4. Very rigid shank
5. Standard with Cool Jet (can be re-sealed)
6. Dirt groove in the clamping bore for safe clamping force
7. Safe-Lock™ (optional)

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)

Machining example Power Shrink Chuck vs. Standard Shrink Cuck

Machining example Power Shrink Cuck

Milling - Ø: 16 mm; n = 13.000 rpm, Feed rate: vf = 5,2 m/min
Right: Power Shrink Chuck (Length: A = 160 mm, cutting depth: ap = 3,6 mm)
Left: Standard Shrink Chuck (Length: A = 160 mm; Cutting depth: ap = 1,8 mm)

Machining example Power Shrink Chuck vs. Standard Shrink Cuck

Machining example Power Shrink Cuck

Milling - Ø: 16 mm; n = 13.000 rpm, Feed rate: vf = 5,2 m/min
Right: Power Shrink Chuck (Length: A = 160 mm, cutting depth: ap = 3,6 mm)
Left: Standard Shrink Chuck (Length: A = 160 mm; Cutting depth: ap = 1,8 mm)

SK50 Shrink Fit Chuck Power Shrink Chuck Technical Drawing

Clamping Ø D1 [mm]	6
Ø D2 [mm] short	21
Ø D2 [mm]	21
Ø D3 [mm] short	70
Ø D3 [mm]	78
L [mm]	36

Order No.

Gage length A in mm

50.440.06.3

short, 80.00 mm

DXF

Step

50.442.06.3

oversize, 160.00 mm

DXF

Step

50.446.06.3

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	8
Ø D2 [mm] short	21
Ø D2 [mm]	21
Ø D3 [mm] short	70
Ø D3 [mm]	78
L [mm]	36

Order No.

Gage length A in mm

50.440.08.3

short, 80.00 mm

DXF

Step

50.442.08.3

oversize, 160.00 mm

DXF

Step

50.446.08.3

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	10
Ø D2 [mm] short	27
Ø D2 [mm]	27
Ø D3 [mm] short	55
Ø D3 [mm]	78
L [mm]	42

Order No.

Gage length A in mm

50.440.10.3

short, 80.00 mm

DXF

Step

50.442.10.3

oversize, 160.00 mm

DXF

Step

50.446.10.3

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	12
Ø D2 [mm] short	27
Ø D2 [mm]	27
Ø D3 [mm] short	55
Ø D3 [mm]	78
L [mm]	47

Order No.

Gage length A in mm

50.440.12.3

short, 80.00 mm

DXF

Step

50.442.12.3

oversize, 160.00 mm

DXF

Step

50.446.12.3

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	14
Ø D2 [mm] short	33,3
Ø D2 [mm]	33
Ø D3 [mm] short	-
Ø D3 [mm]	78
L [mm]	47

Order No.

Gage length A in mm

50.440.14.3

short, 80.00 mm

DXF

Step

50.442.14.3

oversize, 160.00 mm

DXF

Step

50.446.14.3

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	16
Ø D2 [mm] short	33,3
Ø D2 [mm]	33
Ø D3 [mm] short	-
Ø D3 [mm]	78
L [mm]	50

Order No.

Gage length A in mm

50.440.16.3

short, 80.00 mm

DXF

Step

50.442.16.3

oversize, 160.00 mm

DXF

Step

50.446.16.3

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	18
Ø D2 [mm] short	44,7
Ø D2 [mm]	44
Ø D3 [mm] short	-
Ø D3 [mm]	78
L [mm]	50

Order No.

Gage length A in mm

50.440.18.3

short, 80.00 mm

DXF

Step

50.442.18.3

oversize, 160.00 mm

DXF

Step

50.446.18.3

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	20
Ø D2 [mm] short	44,7
Ø D2 [mm]	44
Ø D3 [mm] short	-
Ø D3 [mm]	78
L [mm]	52

Order No.

Gage length A in mm

50.440.20.3

short, 80.00 mm

DXF

Step

50.442.20.3

oversize, 160.00 mm

DXF

Step

50.446.20.3

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	25
Ø D2 [mm] short	44
Ø D2 [mm]	44
Ø D3 [mm] short	78
Ø D3 [mm]	78
L [mm]	58

Order No.

Gage length A in mm

50.440.25.3

short, 100.00 mm

DXF

Step

50.442.25.3

oversize, 160.00 mm

DXF

Step

50.446.25.3

ZG200, 200.00 mm

DXF

Step

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