2) Types and construction features of milling machine

Three general classes of milling machinea are
I)Column and Knee Type
II) Production Type
III)Special purpose type

The essential components of a milling machine are
The Base and Column
The Knee
The saddle
The table
The driving and feed gear boxes
The main spindle
column :vertical support, or backbone, of a machine

Knee, which supports the saddle and gives the table vertical movements for adjusting the depth of cut.
· Saddle, which supports the table and can move transversely.
Work table, on which the work piece is clamped using the T-slots. The table moves longitudinally with respect to the saddle.
Over arm in horizontal machines, which is adjustable to accommodate different arbor lengths.
· Head, which contains the spindle and cutter holders. In vertical machines the head may be fixed or vertically