ER-Collet with cooling channel holes ER20 | 428EC | < 15µm | Ø 9

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)

driving ring and feather key

Without wrench

For highest axial and radial loading

ADJRGA = 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 tools with Morse taper shank and tang according to DIN 228-1 form B

clamping depth l2 = max

Mainly for external machining

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

Application:

For internal machining with boring bars

With adjustable spray nozzles