ER-Collet with cooling channel holes ER20 | 428EC | < 15µm | Ø 9Application: For mounting straight shank tools in collet chucks DIN 6499. Note: Only nominal size d can be clamped, with cooling channels. In order to achieve an optimum sealing the tool must be clamped on the complete length of the ground drill of the collet. (applicable up to 21 bar)

With built-in tightening bolt

5 with h4-tolerance and Ø 6 – Ø 32 with h6-tolerance1

For retaining screw DIN 6367

Surface hardened HRC 58~60

Hardening depth 0

For the manufacturing of special tools

Effective from low to high coolant pressures

For mounting straight-shank tools in collet chucks DIN 6499

- Stainless steel 1

Taper angle tolerance < AT 3 according to DIN 2080

For mounting straight-shank tools acc

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