ER Spring Collet Chuck System
| ORDER NO. | A | B | L mm | D mm | DIN6343 STANDARD PRECISION | VERTEX STANDARD PRECISION | A GRADE OPTIONAL |
| ER-8 | 8.5 | 13.5 | – | – | – | – | – |
| ER-11 | 11.5 | 18 | 6 | 1.0-1.4 | 0.02 | 0.015 | 0.01 |
| ER-16 | 17 | 27 | 10 | 1.5-2.9 | 0.02 | 0.015 | 0.01 |
| ER-20 | 21 | 31 | 16 | 3.0-5.9 | 0.02 | 0.015 | 0.01 |
| ER-25 | 26 | 35 | 25 | 6.0-9.9 | 0.02 | 0.015 | 0.01 |
| ER-32 | 33 | 40 | 40 | 10.0-17.9 | 0.03 | 0.02 | 0.01 |
| ER-40 | 41 | 46 | 40 | 18.0-26.9 | 0.03 | 0.02 | 0.01 |
| WE-50 | 52 | 60 | 60 | 27.0-34.9 | 0.03 | 0.02 | 0.01 |
