What is the top of the lathe and the classification
1) Front of the front of the lathe can be directly installed in the lathe spindle cone hole, the front tip and the workpiece with the rotation, no relative movement, so no need to quench.
The lathe is sometimes available with a three-jaw self-centering chuck to hold a homemade.
After the top of the lathe is removed on the chuck, if it is used again, it must be re-turned 60.
In order to prevent the rotation of the axial force in the role of the top displacement, self-made top of the chuck part of the chuck should be made stage.