HSK ER collect chuck

Main features： 1.The material: Allyed case hardened steel, black-finished and precisely grinded 2.Taper tolerance: AT3 Standard 3.Hardness: 50-55HRC 4.Run out: 0.005mm 5.Coolant: AD, ADB, B type 6.Surface: blacken, sand blasting, plating 7.Dynamic balancing : G2.5/25000rpm