SK40-ER32-160 DIN69871 SK ER Tool Holder ER collet chuck CNC tool holder

Din69871 SK ER Tool Holder SK40-ER32-160,The standard of sk tool holder is German industrial standard DIN 69871. The spindle taper holes of machining centers are generally divided into two categories, namely, the general system with a taper of 7:24 and the HSK vacuum system with a taper of 1:10. SK tool handle standards are mainly divided into the following four types: SK A: without central cooling water hole, SK AD: with central cooling water hole, SK B: with side flange cooling water hole, SK AD/B: with core and side flange cooling water hole, but the side hole is threaded. When core internal cooling is adopted, the side can be blocked with bolts.

SK er collet chuck Specifications

I - SK er collet chuck Material:
High quality carburizing alloy steel;
Central tensile strength 1000N/mm2 Min.;
Surface hardness HRC 60+/-2(HV 700+/-50);
Hardness penetration 0.8+/-0.2mm;
II - SK er collet chuck Tolerance Criteria
Dynamic balance(default): G6.3 12,000 rpm;
Dynamic balance(customized): G2.5 25,000 rpm;
Run-out tolerance: 0.003mm Max.
Cone angle tolerance: AT3

Cone surface roughness: Ra 0.005 Max.