Der CAT-ER-Werkzeughalter ist ein gängiger Werkzeughalter in der Werkzeugmaschinenbearbeitung. Er besteht aus einem Werkzeughalterkörper und einer ER-Spannzange. Hauptsächlich dient er zum Spannen und Fixieren von Werkzeugen mit geradem Schaft, wie z. B. Bohrern und Fräsern.
1. Verschiedene Ausführungen: ER11, ER16, ER20, ER25, ER32, ER40.
2. Einfache Bedienung.
3. Breites Anwendungsgebiet.
| Größe | D | D1 | L | M | Kapazität |
| CAT40-ER16UM-2,5" | 44.45 | 32 | 2,5" | M10 | 1-10 |
| CAT40-ER20UM-2,5" | 44.45 | 35 | 2.5" | M14*1,5 | 1-13 |
| CAT40-ER25-2,5" | 44.45 | 42 | 2.5" | M18*1,5 | 2-16 |
| CAT40-ER32-2,5" | 44.45 | 50 | 2.5" | M22*1,5 | 2-20 |
| CAT40-ER40-3" | 50 | 63 | 3" | M28*1.5 | 3-26 |
| CAT40-ER16UM-4" | 28 | 32 | 4" | M10 | 1-10 |
| CAT40-ER20UM-4" | 34 | 35 | 4" | M14*1.5 | 1-13 |
| CAT40-ER25-4" | 42 | 42 | 4" | M18*1.5 | 2-16 |
| CAT40-ER32-4" | 44.45 | 50 | 4" | M22*1.5 | 2-20 |
| CAT40-ER40-4" | 50 | 63 | 4" | M28*1.5 | 3-26 |
| CAT40-ER16UM-6" | 28 | 32 | 6 Zoll | M10 | 1-10 |
| CAT40-ER20UM-6" | 34 | 35 | 6'' | M14*1.5 | 1-13 |
| CAT40-ER25-6" | 42 | 42 | 6'' | M18*1.5 | 2-16 |
| CAT40-ER32-6" | 44.45 | 50 | 6'' | M22*1.5 | 2-20 |
| CAT40-ER40-6" | 50 | 63 | 6'' | M28*1.5 | 3-26 |
| CAT40-ER16UM-8" | 28 | 32 | 8'' | M10 | 1-10 |
| CAT40-ER20UM-8" | 34 | 35 | 8'' | M14*1.5 | 1-13 |
| CAT40-ER25-8" | 42 | 42 | 8'' | M18*1.5 | 2-16 |
| CAT40-ER32-8" | 44.45 | 50 | 8'' | M22*1.5 | 2-20 |
| CAT40-ER40-8" | 50 | 63 | 8'' | M28*1.5 | 3-26 |
| CAT50-ER16UM-2" | 28 | 32 | 2" | M10 | 1-10 |
| CAT50-ER20UM-2" | 25 | 35 | 2" | M14*1.5 | 1-13 |
| CAT50-ER25-2" | 32 | 42 | 2" | M18*1.5 | 2-16 |
| CAT50-ER32-2" | 40 | 50 | 2" | M22*1.5 | 2-20 |
| CAT50-ER16UM-4" | 28 | 32 | 4" | M10 | 1-10 |
| CAT50-ER20UM-4" | 34 | 35 | 4" | M14*1.5 | 1-13 |
| CAT50-ER25-4" | 42 | 42 | 4" | M18*1.5 | 2-16 |
| CAT50-ER32-4" | 50 | 50 | 4" | M22*1.5 | 2-20 |
| CAT50-ER40-4" | 63 | 63 | 4" | M28*1.5 | 3-26 |
| CAT50-ER50-4" | 69.85 | 78 | 4" | M36*1.5 | 6-34 |
| CAT50-ER16UM-6" | 28 | 32 | 6'' | M10 | 1-10 |
| CAT50-ER20UM-6" | 34 | 35 | 6'' | M14*1.5 | 1-13 |
| CAT50-ER25-6" | 42 | 42 | 6'' | M18*1.5 | 2-16 |
| CAT50-ER32-6" | 50 | 50 | 6'' | M22*1.5 | 2-20 |
| CAT50-ER40-6" | 63 | 63 | 6'' | M28*1.5 | 3-26 |
| CAT50-ER16UM-8" | 28 | 32 | 8" | M10 | 1-10 |
| CAT50-ER20UM-8" | 34 | 35 | 8" | M14*1.5 | 1-13 |
| CAT50-ER25-8" | 42 | 42 | 8" | M18*1.5 | 2-16 |
| CAT50-ER32-8" | 50 | 50 | 8" | M22*1.5 | 2-20 |
| CAT50-ER40-8" | 63 | 63 | 8" | M28*1.5 | 3-26 |
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