What is A Bed Type Milling Machine | Difference Between Knee Mill and Bed Mill

How do you differentiate between knee-type and bed-type milling machines?

Knee-type milling machines and bed-type milling machines are two of the most common types of milling machines used in industrial manufacturing. Here are some ways to differentiate between the two:

1) Design: The key difference between a knee-type milling machine and a bed-type milling machine is in their design. A knee mill has a vertically adjustable knee, which is mounted on a column that is attached to the bed. The worktable is mounted on the knee and can be moved up and down along the Z-axis. In contrast, a bed mill has a fixed bed or base that supports the worktable and the cutting tool. The spindle head moves along the bed to perform the cutting operation.

2) Size and capacity: Bed mills are generally larger and more powerful than knee mills. They are designed to handle heavier and larger workpieces, making them ideal for industrial applications. Knee-type milling machines are typically smaller and more compact, making them suitable for small to medium-sized workpieces.

3) Accuracy and precision: Bed mills are known for their high accuracy and precision, as they have a sturdy and rigid structure that ensures minimal deflection during the cutting process. Knee mills can also offer good accuracy and precision, but they may be more prone to deflection due to their design.

4) Flexibility: Knee-type milling machines are typically more versatile than bed-type milling machines, as the adjustable knee allows for a greater range of cutting operations. This makes them ideal for use in small workshops and for general-purpose milling operations. Bed-type milling machines, on the other hand, are ideal for specialized milling operations that require high accuracy and precision.