... ~45 3.Runout: 0.0005in or 0.013mm ER COLLET WITH STANDARD DIN6499B 1.Material: 65Mn steel2.Hardness: clamping part HRC: 55 ... .This unit is used for boring, milling, drilling, tapping, grinding and engraving operation, etc.Packaging: Company profile:We are a manufacturer ... series,etc.Sales covering the USA,Germany,Britain and regions in South Asia with increasing trust from customers.We are capable of ...