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

Collet Chuck Type ER
DIN ISO 7388-1 SK50 (formerly DIN 69871)
Certificate of Quality
- Chuck body fine balanced G2.5 at 22.000 rpm
- All functional surfaces fine machined
- Taper tolerance AT3
- Coolant supply form AD/AF
Collet Chuck Type ER
DIN ISO 7388-1 SK50 (formerly DIN 69871)
For clamping tools with cylindrical shank in ER collets according to ISO 15488.
With steep taper SK50 form AD/AF DIN ISO 7388-1 (formerly DIN 69871).
Form AD/AF 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 upon request
Technical data subjects to change without prior notice.
Technical drawing

Please select your clamping diameter:
Version | ER 16 |
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Ø D [mm] | 28 |
Clamping range [mm] | 0,5 - 10,0 |
L [mm] short | - |
L [mm] | - |
Order No. | Gage length A in mm | |||||
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50.320.16 | ![]() short, 70.00 mm Also suitable for ANSI-CAT L = drilled through |
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Accessory | ||
50.321.16 | ![]() long, 100.00 mm Also suitable for ANSI-CAT L = drilled through |
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Accessory | ||
50.322.16 | ![]() oversize, 160.00 mm Also suitable for ANSI-CAT L = drilled through |
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Accessory | ||
50.326.16 | ![]() ZG200, 200.00 mm Also suitable for ANSI-CAT L = drilled through |
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Accessory |
Version | ER 20 |
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Ø D [mm] | 34 |
Clamping range [mm] | 1,5 - 13,0 |
L [mm]short | 41,5 |
L [mm] | 41,5 |
Order No. | Gage length A in mm | |||||
---|---|---|---|---|---|---|
50.320.20 | ![]() short, 70.00 mm Also suitable for ANSI-CAT |
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Accessory | ||
50.321.20 | ![]() long, 100.00 mm Also suitable for ANSI-CAT |
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Accessory |
Version | ER 25 |
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Ø D [mm] | 42 |
Clamping range [mm] | 1,0 - 16,0 |
L [mm] short | 62 |
L [mm] | 57 |
Order No. | Gage length A in mm | |||||
---|---|---|---|---|---|---|
50.320.25 | ![]() short, 70.00 mm Also suitable for ANSI-CAT |
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Accessory | ||
50.321.25 | ![]() long, 100.00 mm Also suitable for ANSI-CAT |
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Accessory | ||
50.322.25 | ![]() oversize, 160.00 mm Also suitable for ANSI-CAT |
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Accessory | ||
50.326.25 | ![]() ZG200, 200.00 mm Also suitable for ANSI-CAT |
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Accessory |
Version | ER 32 |
---|---|
Ø D [mm] | 50 |
Clamping range [mm] | 1,5 - 20,0 |
L [mm] short | 64 |
L [mm] | 64 |
Order No. | Gage length A in mm | |||||
---|---|---|---|---|---|---|
50.320.32 | ![]() short, 70.00 mm Also suitable for ANSI-CAT |
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Accessory | ||
50.321.32 | ![]() long, 100.00 mm Also suitable for ANSI-CAT |
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Accessory | ||
50.322.32 | ![]() oversize, 160.00 mm Also suitable for ANSI-CAT |
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Accessory | ||
50.326.32 | ![]() ZG200, 200.00 mm Also suitable for ANSI-CAT |
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Accessory |
Version | ER 40 |
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Ø D [mm] | 63 |
Clamping range [mm] | 2,5 - 26,0 |
L [mm] short | 73 |
L [mm] | 73 |
Order No. | Gage length A in mm | |||||
---|---|---|---|---|---|---|
50.320.40 | ![]() short, 70.00 mm Also suitable for ANSI-CAT |
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Accessory | ||
50.321.40 | ![]() long, 100.00 mm Also suitable for ANSI-CAT |
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|
Accessory | ||
50.322.40 | ![]() oversize, 160.00 mm |
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Accessory | ||
50.326.40 | ![]() ZG200, 200.00 mm |
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Accessory |