BT40 Collet Chuck Typ ER

Certificate of Quality

  • Chuck body fine balanced G2.5 at 22.000 rpm
  • All functional surfaces fine machined
  • Taper tolerance AT3
  • Coolant supply form ADB

Collet Chuck Type ER
JIS B 6339 · BT40

For clamping tools with cylindrical shank in ER collets according to ISO 15488.

With taper JIS B 6339 BT40 form ADB.
Form ADB means: Central coolant supply and coolant channels on the collar which can be sealed again.

  • Included in delivery: Locknut (balanced, with slide coating for higher clamping forces)
  • Locknut type HS (High-Speed, fine balanced, with slide coating for higher clamping forces) for an extra charge
  • Enlarging of size L for an upon request

Technical data subjects to change without prior notice.

Features Collet Chuck Typ ER

The most important features:

  • 1. Fine balanced G2.5 at 25,000 rpm
  • 2. All functional surfaces grinded
  • 3. Fine balanced ER nut
  • 4. High runout accuracy

Technical drawing

BT40 Collet Chuck Typ ER Technical Drawing

Please select your clamping diameter:

Version ER 16
Ø D [mm]28
Clamping range [mm]0,5 - 10,0
L [mm] short-
L [mm]-
Order No. Gage length A in mm    
40.520.16
BT40 Collet Chuck Standard short Pictogram
short, 70.00 mm

L = drilled through
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40.521.16
BT40 Collet Chuck Standard long Pictogram
long, 100.00 mm

L = drilled through
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40.522.16
BT40 Collet Chuck Standard oversize Pictogram
oversize, 160.00 mm

L = drilled through
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Version ER 20
Ø D [mm]34
Clamping range [mm]1,5 - 13,0
L [mm] short41,5
L [mm]41,5
Order No. Gage length A in mm    
40.520.20
BT40 Collet Chuck Standard short Pictogram
short, 70.00 mm
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40.521.20
BT40 Collet Chuck Standard long Pictogram
long, 100.00 mm
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40.522.20
BT40 Collet Chuck Standard oversize Pictogram
oversize, 160.00 mm
DXF
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Version ER 25
Ø D [mm]42
Clamping range [mm]1,0 - 16,0
L [mm] short57
L [mm]57
Order No. Gage length A in mm    
40.520.25
BT40 Collet Chuck Standard short Pictogram
short, 70.00 mm
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40.521.25
BT40 Collet Chuck Standard long Pictogram
long, 100.00 mm
DXF
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40.522.25
BT40 Collet Chuck Standard oversize Pictogram
oversize, 160.00 mm
DXF
Step
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Version ER 32
Ø D [mm]50
Clamping range [mm]1,5 - 20,0
L [mm] short64
L [mm]64
Order No. Gage length A in mm    
40.520.32
BT40 Collet Chuck Standard short Pictogram
short, 70.00 mm
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40.521.32
BT40 Collet Chuck Standard long Pictogram
long, 100.00 mm
DXF
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40.522.32
BT40 Collet Chuck Standard oversize Pictogram
oversize, 160.00 mm
DXF
Step
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Version ER 40
Ø D [mm]63
Clamping range [mm]2,5 - 26,0
L [mm] short72
L [mm]73
Order No. Gage length A in mm    
40.520.40
BT40 Collet Chuck Standard short Pictogram
short, 70.00 mm
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40.521.40
BT40 Collet Chuck Standard long Pictogram
long, 100.00 mm
DXF
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40.522.40
BT40 Collet Chuck Standard oversize Pictogram
oversize, 160.00 mm
DXF
Step
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