ER-Precision collet | stainless steel ER20 | 428ESP | < 5 µm | Ø 8,5 - 8,0Rustproof Stainless steel 1. 4021 x 20Cr13 HRC 43 47 Longer lived than standard collets Higher repeat accuracy Maximum concentricity <0,005mm Honed collet boring Especially suitable fore wire EDM

For sealing tools with internal cooling

With built-in tightening bolt

800 N/mm² after DIN

low warpage hardened

5 with h4-tolerance and Ø 6 – Ø 32 with h6-tolerance2

For the manufacturing of special tools

4021 x 20Cr13

Effective from low to high coolant pressures

critical factors for successful deep face grooving operations

Tensile strength in the core of min

Sealing capacity up to 80 bar

All functional surfaces fine machined