What Is the Difference Between 3-Axis and 5-Axis Machining?

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The main difference between 3-axis and 5-axis CNC machining boils down to the degrees of freedom the cutting tool has during operation. This directly affects the complexity of parts that can be produced.

3-Axis Machining

The cutting tool can move along three linear axes: X (horizontal movement), Y (lateral movement), and Z (depth movement). Imagine a box; these three axes define the length, width, and height of that box.

Because of this limitation, 3-axis machining is ideal for creating parts with relatively simple geometries. These can be pockets, slots, planes, and other features that can be formed by the tool moving in a straight line along the X, Y, or Z axis.

For complex parts with intricate features or multiple angles, the workpiece needs to be repositioned multiple times during machining. This adds setup time and increases the chance of errors due to repositioning.

5-Axis Machining

In addition to the X, Y, and Z movements, the tool can also rotate around two additional axes, often designated A and B (although specific names may vary). A-axis typically refers to rotation around the X-axis, and B-axis rotation occurs around the Y-axis.

Think of 5-axis machining like tilting the box you imagined earlier. The rotational axes allow the tool to approach the workpiece from various angles simultaneously. This eliminates the need for constant repositioning.

This additional capability unlocks the creation of highly complex parts with intricate 3D geometries, undercuts, and angled features. It also allows for more efficient machining of these parts in a single setup, reducing production time.

 

let me introduce you to more, demystifying the costs of 5-Axis CNC machining: from factors to advantages.

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