ER-Collet with cooling channels ER20 | 428ECC | < 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)

wrench and collets

With wrench

Effective from low to high coolant pressures

5 with h4-tolerance and Ø 6 – Ø 32 with h6-tolerance3

better chip evacuation

driving ring and feather key

carbon steel

without cooling lubricant supply

Minimal length compensation on compression and expansion balances very small pitch differences between synchro spindle and tap

right angularity: 0

LSCX = Clamping depth

alloyed steel