BT50 Shrink Fit Chuck Standard

Certificate of Quality

Chuck body fine balanced G2.5 at 25.000 rpm or U < 1 gmm
Taper tolerance AT3
Coolant supply form JD/JF

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BT50 Shrink Fit Chuck Standard

Shrink Fit Chuck Standard Version
JIS B 6339-2 · BT50

Certificate of Quality

Chuck body fine balanced G2.5 at 25.000 rpm or U < 1 gmm
Taper tolerance AT3
Coolant supply form JD/JF

Shrink Fit Chuck Standard Version
JIS B 6339-2 · BT50

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

JIS B 6339-2 BT50 form JD/JF.
Form JD/JF: interior coolant supply through centre (Form JD) and through the collar (form JF)

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
Inch sizes: Cool Jet bores that can be sealed included
Metric sizes: Cooling with Cool Jet for an extra charge
Cooling with Cool Flash for an extra charge
Included in delivery: Back-up 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

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)

BT50 Shrink Fit Chuck Standard Technical Drawing

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

Order No.

Gage length A in mm

50.640.06

short, 100.00 mm

DXF

Step

50.647.06

short, 120.00 mm

DXF

Step

50.644.06

ZG130, 130.00 mm

DXF

Step

50.642.06

oversize, 160.00 mm

DXF

Step

50.646.06

ZG200, 200.00 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

50.640.08

short, 100.00 mm

DXF

Step

50.647.08

short, 120.00 mm

DXF

Step

50.644.08

ZG130, 130.00 mm

DXF

Step

50.642.08

oversize, 160.00 mm

DXF

Step

50.646.08

ZG200, 200.00 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

50.640.10

short, 100.00 mm

DXF

Step

50.647.10

short, 120.00 mm

DXF

Step

50.644.10

ZG130, 130.00 mm

DXF

Step

50.642.10

oversize, 160.00 mm

DXF

Step

50.646.10

ZG200, 200.00 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

50.640.12

short, 100.00 mm

DXF

Step

50.647.12

short, 120.00 mm

DXF

Step

50.644.12

ZG130, 130.00 mm

DXF

Step

50.642.12

oversize, 160.00 mm

DXF

Step

50.646.12

ZG200, 200.00 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

50.640.14

short, 100.00 mm

DXF

Step

50.647.14

short, 120.00 mm

DXF

Step

50.644.14

ZG130, 130.00 mm

DXF

Step

50.642.14

oversize, 160.00 mm

DXF

Step

50.646.14

ZG200, 200.00 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

50.640.16

short, 100.00 mm

DXF

Step

50.647.16

short, 120.00 mm

DXF

Step

50.644.16

ZG130, 130.00 mm

DXF

Step

50.642.16

oversize, 160.00 mm

DXF

Step

50.646.16

ZG200, 200.00 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

50.640.18

short, 100.00 mm

DXF

Step

50.647.18

short, 120.00 mm

DXF

Step

50.644.18

ZG130, 130.00 mm

DXF

Step

50.642.18

oversize, 160.00 mm

DXF

Step

50.646.18

ZG200, 200.00 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

50.640.20

short, 100.00 mm

DXF

Step

50.647.20

short, 120.00 mm

DXF

Step

50.644.20

ZG130, 130.00 mm

DXF

Step

50.642.20

oversize, 160.00 mm

DXF

Step

50.646.20

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	25
Ø D2 [mm] short	45
Ø D2 [mm]	44
Ø D3 [mm] short	53
Ø D3 [mm]	53
L [mm]	58

Order No.

Gage length A in mm

50.640.25

short, 100.00 mm

DXF

Step

50.647.25

short, 120.00 mm

DXF

Step

50.644.25

ZG130, 130.00 mm

DXF

Step

50.642.25

oversize, 160.00 mm

DXF

Step

50.646.25

ZG200, 200.00 mm

DXF

Step

Clamping Ø D1 [mm]	32
Ø D2 [mm] short	45
Ø D2 [mm]	44
Ø D3 [mm] short	53
Ø D3 [mm]	53
L [mm]	58

Order No.

Gage length A in mm

50.640.32

short, 100.00 mm

DXF

Step

50.647.32

short, 120.00 mm

DXF

Step

50.644.32

ZG130, 130.00 mm

DXF

Step

50.642.32

oversize, 160.00 mm

DXF

Step

50.646.32

ZG200, 200.00 mm

DXF

Step

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