
Certificate of Quality
- Chuck fine balanced G2.5 at 22.000 rpm
- All functional surfaces fine machined
- Taper tolerance AT3
- Coolant supply form ADB
Your current product selection:

Collet Chuck Type ER
ASME B5.50 · CAT40
Certificate of Quality
- Chuck fine balanced G2.5 at 22.000 rpm
- All functional surfaces fine machined
- Taper tolerance AT3
- Coolant supply form ADB
Collet Chuck Type ER
ASME B5.50 · CAT40
For clamping tools with cylindrical shank in ER collets according to ISO 15488.
CAT40 FORM AD/AF.
Form AD/AF means: Central-coolant supply and coolant channels through the flange which can be sealed again.
- Balanced collet nuts with special slide coating for low friction and higher clamping forcess
- Included in delivery: ER collet chuck with pre-balanced collet nut
Technical data subjects to change without prior notice.
Technical drawing

Please select your clamping diameter:
Version | ER 11 |
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Ø D [inch] | 0.75 |
Clamping range [inch] | 0.02 - 0.28 |
Clamping range [mm] | 0.5 - 7 |
L [inch] | - |
Order No. | Gage length A in inch | |||||
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40.721.11 | ![]() long, 3.94 inch L = drilled through |
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Accessory |
Version | ER 16 |
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Ø D [inch] | 1.1 |
Clamping range [inch] | 0.02 - 0.39 |
Clamping range [mm] | 0.5 - 10 |
L [inch] short | - |
L [inch] | - |
Order No. | Gage length A in inch | |||||
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40.720.16 | ![]() short, 2.76 inch L = drilled through |
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Accessory | ||
40.721.16 | ![]() long, 3.94 inch L = drilled through |
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Accessory | ||
40.722.16 | ![]() oversize, 6.30 inch L = drilled through |
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Accessory | ||
40.726.16 | ![]() ZG200, 7.87 inch L = drilled through |
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Accessory |
Version | ER 20 |
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Ø D [inch] | 1.34 |
Clamping range [inch] | 0.04 - 0.51 |
Clamping range [mm] | 1 - 13 |
L [inch] short | 1.63 |
L [inch]. | 1.63 |
Order No. | Gage length A in inch | |||||
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40.720.20 | ![]() short, 2.76 inch |
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Accessory | ||
40.721.20 | ![]() long, 3.94 inch |
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Accessory | ||
40.722.20 | ![]() oversize, 6.30 inch |
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Accessory | ||
40.726.20 | ![]() ZG200, 7.87 inch |
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Accessory |
Version | ER 25 |
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Ø D [inch] | 1.65 |
Clamping range [inch] | 0.04 - 0-63 |
Clamping range [mm] | 1 - 16 |
L [inch] short | 2.44 |
L [inch] | 2.24 |
Order No. | Gage length A in inch | |||||
---|---|---|---|---|---|---|
40.720.25 | ![]() short, 2.76 inch |
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Accessory | ||
40.721.25 | ![]() long, 3.94 inch |
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Accessory | ||
40.722.25 | ![]() oversize, 6.30 inch |
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Accessory | ||
40.726.25 | ![]() ZG200, 7.87 inch |
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Accessory |
Version | ER 32 |
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Ø D [inch] | 1.97 |
Clamping range [inch] | 0.04 - 0.79 |
Clamping range [mm] | 1 - 20 |
L [inch] short | 2.52 |
L [inch] | 2.52 |
Order No. | Gage length A in inch | |||||
---|---|---|---|---|---|---|
40.720.32 | ![]() short, 2.76 inch |
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Accessory | ||
40.721.32 | ![]() long, 3.94 inch |
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Accessory | ||
40.722.32 | ![]() oversize, 6.30 inch |
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Accessory | ||
40.726.32 | ![]() ZG200, 7.87 inch |
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Accessory |