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BT40 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 ADB
Your current product selection:
BT40 Shrink Fit Chuck Standard

Shrink Fit Chuck Standard Version with Safe-Lock™
JIS B 6339 · BT40

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 ADB

Shrink Fit Chuck Standard Version with Safe-Lock™
JIS B 6339 · BT40

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

JIS B 6339 BT40 form ADB
Form ADB 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
  • 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
  • Safe-Lock™ pull out protection included
  • Included in delivery: Back-up screw, tension spring

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
Safe-Lock™  for Shrink Fit Chucks

Safe-Lock™ pull out protection

  • Highly accurate clamping due to shrink fit technology
  • High torque due to form closed clamping
  • No loss of accuracy
  • No pull out and no spinning ot the tool
  • Groove on tool shank is directed so that the tool will be pulled into the chuck (depending on direction of rotation)
Safe-Lock™  for Shrink Fit Chucks

Safe-Lock™ pull out protection

  • Highly accurate clamping due to shrink fit technology
  • High torque due to form closed clamping
  • No loss of accuracy
  • No pull out and no spinning ot the tool
  • Groove on tool shank is directed so that the tool will be pulled into the chuck (depending on direction of rotation)
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)

Technical drawing

BT40 Shrink Fit Chuck Standard Technical Drawing

Please select your clamping diameter:

Clamping Ø D1 [inch] 1/4
Ø D2 [inch]0.83
Ø D3 [inch]1.06
L [inch]1.42
Order No. Gage length A in inch    
40.640.1/4z.47 BT40 Shrink Fit Chuck Standard short Pictogram
short, 3.54 inch

With tension spring
DXF
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Clamping Ø D1 [inch] 5/16
Ø D2 [inch]0.83
Ø D3 [inch]1.06
L [inch]1.42
Order No. Gage length A in inch    
40.640.5/16z.47 BT40 Shrink Fit Chuck Standard short Pictogram
short, 3.54 inch

With tension spring
DXF
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Clamping Ø D1 [inch] 3/8
Ø D2 [inch]0.94
Ø D3 [inch]1.26
L [inch]1.65
Order No. Gage length A in inch    
40.640.3/8z.47 BT40 Shrink Fit Chuck Standard short Pictogram
short, 3.54 inch

With tension spring
DXF
Step
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Clamping Ø D1 [inch] 1/2
Ø D2 [inch]0.94
Ø D3 [inch]1.26
L [inch]1.85
Order No. Gage length A in inch    
40.640.1/2z.4 BT40 Shrink Fit Chuck Standard short Pictogram
short, 3.54 inch

With tension spring
DXF
Step
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Clamping Ø D1 [inch] 5/8
Ø D2 [inch]1.06
Ø D3 [inch]1.34
L [inch]1.97
Order No. Gage length A in inch    
40.640.5/8z.47 BT40 Shrink Fit Chuck Standard short Pictogram
short, 3.54 inch

With tension spring
DXF
Step
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Clamping Ø D1 [inch] 3/4
Ø D2 [inch]1.30
Ø D3 [inch]1.65
L [inch]2.05
Order No. Gage length A in inch    
40.640.3/4z.47 BT40 Shrink Fit Chuck Standard short Pictogram
short, 3.54 inch

With tension spring
DXF
Step
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Clamping Ø D1 [inch] 1
Ø D2 [inch]1.73
Ø D3 [inch]2.09
L [inch]2.28
Order No. Gage length A in inch    
40.640.1z.47 BT40 Shrink Fit Chuck Standard short Pictogram
short, 3.94 inch

With tension spring
DXF
Step
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Clamping Ø D1 [inch] 1 1/4
Ø D2 [inch]1.73
Ø D3 [inch]2.09
L [inch]2.28
Order No. Gage length A in inch    
40.640.11/4z.47 BT40 Shrink Fit Chuck Standard short Pictogram
short, 3.94 inch

With tension spring
DXF
Step
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Clamping Ø D1 [mm] 6
Ø D2 [mm]21
Ø D3 [mm]27
L [mm]36
Order No. Gage length A in mm    
40.640.06.7 BT40 Shrink Fit Chuck Standard short Pictogram
short, 90.00 mm
DXF
Step
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Clamping Ø D1 [mm] 8
Ø D2 [mm]21
Ø D3 [mm]27
L [mm]36
Order No. Gage length A in mm    
40.640.08.7 BT40 Shrink Fit Chuck Standard short Pictogram
short, 90.00 mm
DXF
Step
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Clamping Ø D1 [mm] 10
Ø D2 [mm]24
Ø D3 [mm]32
L [mm]42
Order No. Gage length A in mm    
40.640.10.7 BT40 Shrink Fit Chuck Standard short Pictogram
short, 90.00 mm
DXF
Step
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Clamping Ø D1 [mm] 12
Ø D2 [mm]24
Ø D3 [mm]32
L [mm]47
Order No. Gage length A in mm    
40.640.12.7 BT40 Shrink Fit Chuck Standard short Pictogram
short, 90.00 mm
DXF
Step
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Clamping Ø D1 [mm] 14
Ø D2 [mm]27
Ø D3 [mm]34
L [mm]47
Order No. Gage length A in mm    
40.640.14.7 BT40 Shrink Fit Chuck Standard short Pictogram
short, 90.00 mm
DXF
Step
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Clamping Ø D1 [mm] 16
Ø D2 [mm]27
Ø D3 [mm]34
L [mm]50
Order No. Gage length A in mm    
40.640.16.7 BT40 Shrink Fit Chuck Standard short Pictogram
short, 90.00 mm
DXF
Step
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Clamping Ø D1 [mm] 18
Ø D2 [mm]33
Ø D3 [mm]42
L [mm]50
Order No. Gage length A in mm    
40.640.18.7 BT40 Shrink Fit Chuck Standard short Pictogram
short, 90.00 mm
DXF
Step
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Clamping Ø D1 [mm] 20
Ø D2 [mm]33
Ø D3 [mm]42
L [mm]52
Order No. Gage length A in mm    
40.640.20.7 BT40 Shrink Fit Chuck Standard short Pictogram
short, 90.00 mm
DXF
Step
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Clamping Ø D1 [mm] 25
Ø D2 [mm]44
Ø D3 [mm]53
L [mm]58
Order No. Gage length A in mm    
40.640.25.7 BT40 Shrink Fit Chuck Standard short Pictogram
short, 100.00 mm
DXF
Step
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Clamping Ø D1 [mm] 32
Ø D2 [mm]44
Ø D3 [mm]53
L [mm]58
Order No. Gage length A in mm    
40.640.32.7 BT40 Shrink Fit Chuck Standard short Pictogram
kurz, 100.00 mm
DXF
Step
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Product wishlist