The utility model relates to the technical field of
machining, and discloses a finish turning tool capable of repairing a main tooth center hole, which comprises a
machine tool spindle, a connecting disc is mounted at one end of the
machine tool spindle through a third bolt, and a positioning body is mounted at one end, far away from the
machine tool spindle, of the connecting disc through a second bolt. A positioning sleeve is installed at the end, away from the connecting disc, of the positioning body through a first bolt. The inner
diameter of the end, away from the positioning body, of the positioning sleeve is matched with the outer
diameter of the workpiece body. According to the anti-skidding spring
collet chuck, the
friction force between the spring
collet chuck and a workpiece is increased through the anti-skidding protrusions on the
conical surface, it is guaranteed that the workpiece is stably positioned in the clamping process, and the sliding phenomenon is effectively prevented; in the
machining process of high rotating speed or large torque, the anti-skid protrusions provide additional
friction force, displacement or loosening of a workpiece caused by vibration or
centrifugal force in the
machining process is prevented, and machining stability is guaranteed.