ER-Precision collet | stainless steel ER20 | 428ESP | < 5 µm | Ø 4,5 - 4,0Rustproof 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

- HRC 43-47

In order to achieve an optimum sealing the tool must be clamped on the complete length of the ground drill of the collet

Mainly for external machining

With high precision coolant you get improved

For the manufacturing of special tools

4021 x 20Cr13

Clamping range 0

Tensile strength in the core of min

5 with h4-tolerance and Ø 6 – Ø 32 with h6-tolerance6

clamping depth l2 = max

For mounting solid drills with cylindrical shank according to DIN 6595

5 with h4-tolerance and Ø 6 – Ø 32 with h6-tolerance4