Beat quality ER25UM collet nut DIN6499B

Material:42CrMo Precision:0.005mm HRC50-53 long cryogenic treatment and heat aging treatment, improve the precision and the stability of the size Thread and 30 ° slope a molding processing, thread tolerance grade with 4 h level, precision by a detection;
Holding hole  grinded times, which can reach Ra0.4, to a mirror effect high quality moderate price,quick delivery and full trackin g  service

The default dynamic balance G6.3-18000 RPM, G2.5-30000 RPM

Surface sand coating processing, improve the surface hardness and wear resistance, improve the cleanliness, rust and corrosion resistance, better accuracy more stable, the surface more smooth, feel more comfortable, look more beautiful