| Manufacturer Part Number | 525440 |
| Collet System | ER |
| Collet Series | ER20 |
| Shank Type | Taper Shank |
| Taper Size | CAT50 |
| Projection (Decimal Inch) | 4.00" |
| Minimum Collet Capacity (Decimal Inch) | 0.019" |
| Maximum Collet Capacity (Decimal Inch) | 0.551" |
| Balanced to (RPM) | 20000 RPM at G2.5 |
| Collet Nut Diameter (Decimal Inch) | 1.38" |
| Seat Depth (Decimal Inch) | 1.06" |
| Product Type | Collet Chuck |