... elastic clamping40~45 3.Runout: 0.0005in or 0.013mm ER COLLET WITH STANDARD DIN6499B 1.Material: 65Mn steel2.Hardness: clamping part HRC: 55 ... tool accessories.Production includes milling chuck series,CNC tool series,collet series,boring heads series,etc.Sales covering the USA, ... Germany,Britain and regions in South Asia with increasing trust from customers.We are capable of supplying ...