Numerically controlled lathe

The utility model provides a numerically controlled lathe, it includes lathe crossbeam, chuck, axle clearance adjusting device and lathe spindle, be equipped with the link plate in the middle of the lathe crossbeam, be equipped with the guide rail between link plate and the crossbeam, the chuck includes chuck body and locates a plurality of jack catchs on the chuck body, the jack catch includes first claw and second claw, second claw and the coaxial setting of first claw, axle clearance adjusting device includes ball bearing, flat housing, axle sleeve and cap and bearing frame, be equipped with ball bearing, flat housing and cap on the excircle of axle sleeve, the lathe spindle overcoat is equipped with the rack sleeve, and main shaft one end is equipped with hydro -cylinder flange and belt pulley, the belt pulley is located between hydro -cylinder flange and the rack sleeve, the rack sleeve is equivalent to that the one end of belt pulley is equipped with first ring flange, is equipped with the second ring f