Component of milling machine

So far, milling machine has been our major topic of discussion on this website. It was explained as the process of machining using a rotary cutter to remove material by advancing a cutter into a workpiece. An engineering workshop is not complete without this machine due its suitability on some operations like T-slot, plain, face, side etc. milling operation.

milling machine

Today we’ll be looking at the various milling machine component and their functions

Read: Everything you need to know about milling machine

Milling machine parts

The following stated below are the milling machine parts:


This milling machine part is the foundation of a milling that carries the weight of the machine and move it to the ground.  All component is mounted on the base. This base is made of cast iron due to its high compressive strength.


The column is vertically mounted on the base as its supports the knee, table, etc. it also works as housing for all the other driving member. This column is a hollow member that contains driving gears and sometimes motor for the spindle and the spindle and the table.


The knee is a cast iron that supports the saddle and table as its enclosed all gear mechanism. It is attached to the column in a dovetail way. The knee is design to be adjusted by a vertical positioning screw (elevating screw). This screw helps to adjust the knee up and down by raising or lowering the lever either by a power feed or by hand.


This machine part is located between the table and the knee as its serve as an intermediate part between them. This move transversely to the face of column which is to provide motion in horizontal direction to the workpiece. It is also made of cast iron.

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The table is situated over the knee in order to holds the workpiece during the process. it is made of cast iron and has t-slot cut on it. This provides vertical motion by moving the knee up and down and provides horizontal motion by the feed screw provided by the saddle.

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Overhanging arm:

The milling machine component is used to fastened arbor support. It may consist of one or two cylindrical bars that slide through the holes in the column. It is also made with cast iron.


The spindle is the part of the machine which holds the tool in place, this spindle offers rotary motion and drive for arbors, cutters, and attachment used on the machine.


The arbor serves as an extension part of the spindle in a horizontal mill machine. It is fitted to the spindle whenever it’s needed.  The arbor holds the tool and moves it in the correct direction.

Arbor supports:

Milling machine generally have two types of arbor supports, the first one has a small diameter bearing hole, 1-inch in maximum diameter, and the second one has a large diameter bearing hole of about 23/4 inches. This milling part contains an oil reservoir which aid the lubrication of the bearing surfaces. This arbor support is use only in the horizontal types of milling machines and it’s clamped anywhere on the overarm.

Read: Understanding lathe machine

Milling head:

The milling head is the upper part of a vertical mill machine. It consists of spindle, driving motor and other controlling mechanisms.


The milling machine part can move transversely (in and out) on the column by a hand level. One end of the arm is attached to the column and the other ends on the milling head.

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That is it for this article, milling machine parts. i hope you enjoy the reading, if so, kindly comment and share. thanks!

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