Linear Technology
Axial Play
Mechanical play in the axial direction of a bearing or guide — the amount by which a component can be displaced along the shaft axis without requiring significant force.
Definition
| Class | Lead Tolerance | Application |
|---|---|---|
| C0 (highest precision) | ≤ 3.5 µm / 300 mm | High-precision CNC axes |
| C3 | ≤ 8 µm / 300 mm | General mechanical engineering |
| C5 | ≤ 18 µm / 300 mm | Conveyor technology, standard applications |
Practical Relevance
In linear guides used in machining centers or measuring machines, axial play must be minimal to achieve repeatability in the micrometer range. Measurement is performed with a dial indicator under alternating axial load. Worn bearings show significantly increased axial play and must be replaced.