ER-Collet with cooling channel holes ER20 | 428EC | < 15µm | Ø 7Application: 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 sealing tools with internal cooling in collet chucks

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

For the manufacturing of special tools

DIN 1835 form A+B+E and DIN 6535 form HA+HB+HE (larger than dia

critical factors for successful deep face grooving operations

With clamping screw

With balanced clamping nut

For mounting straight-shank tools acc

contact- and hot air shrink units

With retaining screw