- Constructed of high quality alloy steel - SAE8620/20MnCR5
- Taper to taper runout: <0.0002”
- Coolant through spindle
- CAT40 balanced G2.5@20,000 RPM
- Balanced tools supplied with QA certificates
- Supplied with depth set screws
- Supplied with high torque hard coat power nuts
- Taper shank ground to AT3 accuracy or better
- DIN AD+B flange coolant
| Collet Series | Collet Cap Min-Max (Inch) | Nut | D (Inch) | L (Inch) | Locknut Reference | Wrench Reference | Stop Screw Reference | Weight (lbs) |
| ER20 | 0.02-0.50 | Hex | 1.34 | 2.50 | 312183 | 312175 | 312185 | 2.4 |
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