ER-Collet chuck SK 50 - 2/13 - 70 | ER 20Application: For mounting straight shank tools in collets. Delivery: With balanced clamping nut All holders are made of forged steel Specific, low warpage hardened Surface hardened HRC 58~60 Hardening depth 0,8mm~0,9mm Taper angle tolerance < AT 3 according to DIN 2080 Surface roughness Ra < 0,4 m Tensile strength in the core of min. 800 N mm after DIN All functional surfaces fine machined

Measures external groves and recessed hub dimensions

Mainly for external machining

clamping depth = -

The clamping screw incorporates a through hole

4021 x 20Cr13

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

With ER-Mini-nut

4 and 5 mm only solid carbide tool shanks must be used

For machining centres with synchronous spindle

Measuring surfaces are carbide

The internal thread provided for the coolant tube in the PSC toolholder is plugged with the socket-head screw incorporated in the adapter

alloyed steel