Collets set ER20 | 428 ECC | 6-part kit DIN 6499 B (ISO 15488 B) in wooden socketApplication: 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)

For internal machining with boring bars

(applicable up to 21 bar)

Surface roughness Ra < 0

B4 - 25 x 16 x 30

Toolholders suitable for induction-

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

critical factors for successful deep face grooving operations

5 with h4-tolerance and Ø 6 – Ø 32 with h6-tolerance5

Without wrench

5 with h4-tolerance and Ø 6 – Ø 32 with h6-tolerance6

For face machining

- Maximum concentricity <0