Parts of Vertical Milling Machine


Parts of Vertical Milling Machine
The vertical knee mill is the most common milling machine found in machine shops today. Therefore it will be used as an example to describe the general parts of all mills.

Head
              The head (drive) is that part of the drive system that transforms electrical power from a motor to mechanical power in the spindle. The drive system also allows the machinist to change the speed of the spindle (RPM) and therefore the cutting tool. The quill moves vertically in the head and contains the spindle in which cutting tools are installed.
Column
               The column is the most important part which is mounted on the base and acts as a support and holding device for all the other parts of a milling machine. It acts as a support for table and all feed mechanisms. The column should be rigid enough to sustain all the forces produced due to the drilling action of the tool. The head and worktable are mounted with column.
Work table
It gives the motion in X-direction.
Saddle
It gives the motion in Y-direction.

Knee
It gives the motion in Z-direction.

             The saddle sits on the knee and allows translation of the worktable. Sitting on the base is the column whose main function is to hold the turret. The turret allows the milling head to be rotated around the column's center. The over arm (ram) slides on the turret and allows the milling head to be repositioned over the table.
Base
               The whole machine is mounted on this part. The base is that part of a machine on which the column is mounted. In the belt driven milling machines both the fast and loose pulley and cone pulley are also mounted on the base. In general the base is of a circular cross section when viewed from top. The base also has T-slots on it facilitating holding of large pieces for machining.

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