ER-Precision collet | stainless steel ER20 | 428ESP | < 5 µm | Ø 6,5 - 6,0Rustproof 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 machines with rigid tapping

With drivers

For mounting milling cutters with transverse or longitudinal groove

- Rustproof

4 and 5 mm only solid carbide tool shanks must be used

length adjustment range

Only nominal size d can be clamped with sealing plug for internal cooling (applicable up to 21 bar) In order to achieve an optimum sealing the tool must be clamped on the complete length of the ground drill of the collet

For mounting straight-shank tools in collet chucks DIN 6391

DIN 1835 form A+B+E and DIN 6535 form HB+HE (larger than Ø 20 mm only with reduction sleeve)

- Maximum concentricity <0

To use for high speed cutting and high precision milling

For machining centres with synchronous spindle