In general, motorized spindle is used in CNC machinery, and mechanical spindle is used in general machine tools.
Reason: low cost lathe can not use motorized spindle, because the cost is too high. The high-end lathe is not suitable for high-precision lathe because of the high demand for spindle accuracy, and the thermal deformation of motorized spindle with high heat is very simple, and then the change of spindle box height is formed.
Motorized spindle is a new technology in the field of CNC machine tools, which integrates the spindle and spindle motor. The main drive system of high-speed CNC machine tool cancels belt wheel drive and gear drive. The spindle of the machine tool is directly driven by the built-in motor, so that the length of the main drive chain of the machine tool is shortened to zero, and the "Zero drive" of the machine tool is realized.
Mechanical spindle refers to the axis on the machine tool that drives the workpiece or cutter to rotate. It is usually composed of spindle, bearing and transmission parts (gear or pulley). In the machine, it is mainly used to support transmission parts such as gears and pulleys to transmit motion and torque, such as machine tool spindle; some are used to clamp workpiece, such as spindle.