In CNC machining, 2.5D refers to tool paths that mill flat surfaces at different heights. The machine moves in the X and Y axes while cutting. The Z-axis determines the cutting depth, but it stays fixed during the cut. This is different from 3D machining, where the tool moves on all three axes simultaneously to cut complex curved shapes. 2.5D is ideal for pockets, slots, and holes.
Mechanic Glossary
2.5D
A machining or modeling process where tool movement occurs in three axes (X, Y, and Z), but the Z-axis depth is fixed during a single milling operation.
Frequently Asked Questions
In 2.5D machining, Z-axis remains at a fixed depth during the cut. In 3D machining, the tool moves in X, Y, and Z axes simultaneously.
Flat brackets, engine adapter plates, and custom spacer blocks that do not require complex curves.
Yes. Any 3-axis CNC machine can perform 2.5D milling, as it only requires controlling the three axes.