CAT40 ER20 Collet Chuck
| Part Name | Collet | Length | D | D1 | L | L1 | L2 |
| CAT40 ER20-2.5" | ER20 | 2.50" | 1.34" | 1.34" | 2.50" | 1.04" | 0.91" |
| CAT40 ER20-3.5" | ER20 | 3.50" | 1.34" | 1.34" | 3.50" | 1.04" | 1.91" |
| CAT40 ER20-4" | ER20 | 4.00" | 1.34" | 1.34" | 4.00" | 1.04" | 2.42" |
| CAT40 ER20-6" | ER20 | 6.00" | 1.34" | 1.34" | 6.00" | 1.04" | 4.42" |
| CAT40 ER20-8" | ER20 | 8.00" | 1.34" | 1.34" | 8.00" | 1.04" | 6.42" |
| CAT40 ER20-10" | ER20 | 10.00" | 1.34" | 1.34" | 10.00" | 1.04" | 8.42" |