There are many types of tool holders. We usually see BT50 and BT40 collet chuck tool holders . BT refers to the taper shank of the machining center manufactured by the Japa n standard MAS403, with a manipulator clamping slot;
BT tool holders, made of high-quality materials- 40Cr / 20CrMnTi , has good elasticity and wear resistance after heat treatment, high precision and stable performance. It is mainly used for clamping tool holder and tool in drilling, milling, reaming, tapping and grinding.