Difference between upmilling and down milling??

Question

Accepted Answer

Upmilling and down milling are two different types of milling processes used in machining.

Upmilling, also known as conventional milling, involves feeding the workpiece against the rotation of the milling cutter.
Down milling, also known as climb milling, involves feeding the workpiece in the same direction as the rotation of the milling cutter.
In upmilling, the cutting forces tend to lift the workpiece, resulting in a less stable cutting process.
In down milling, the cutting forces tend to press the workpiece against the table, providing better stability.
Upmilling is generally used for roughing operations, while down milling is preferred for finishing operations.
Upmilling produces a better surface finish on the bottom of the workpiece, while down milling produces a better surface finish on the top.
In upmilling, the chips are carried upward and away from the workpiece, reducing the risk of re-cutting.
In down milling, the chips are carried downward and can potentially cause re-cutting, leading to poor surface finish.
The choice between upmilling and down milling depends on factors such as the material being machined, the desired surface finish, and the machine capabilities.

Accepted Answer

Upmilling -tool rotate anti clockwise and job moves right to left
Down milling- tool rotate clock wise and job moves left to right

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