The belt-driven spindle has a max speed of 15,000 RPM, it can achieve greater levels of power and torque, also lower in cost. The integral motor spindle has a maximum speed of 60,000 RPM, which enables it capable of lots many machining needs but also limits the service life. High-speed spindles are the most common options in CNC machine shops, there are two types of high-speed spindles: integral motor spindle and belt-driven spindle.

BT50 and BT60 generally do rough machining, the maximum speed is only 8000RPM, this kind of spindle is not commonly used in the CNC machining center. It can also be used for the mold with a large drilling diameter, and its application range is the widest among these different types of spindle.ДЈ. This kind of spindle can be used for finishing or rough machining. A large part of machining centers uses BT40 spindle. BT40: spindle diameter is medium, and the maximum speed is limited. It is generally used in drilling and tapping center or some small machining center, and is most suitable for making mold and drilling and tapping.Дў. BT30: spindle diameter is small, the maximum speed that can be achieved is higher than the spindle diameter. Due to the different diameters of the spindles, the rotation speed is different, which directly leads to the machining capability is different.ДЎ. The machining centers that these different types of spindles can match are different. There are many kinds of classification of CNC machining center spindle, different countries have different standards, there is a common classification according to the spindle taper, such as BT60, BT50, BT40, BT30, the number after BT represents the taper interface diameter of the tool holder.

Cnc spindle