Industrial robot joints rely on high‑precision, multi‑load‑capable bearings to handle combined radial, axial, and moment loads while maintaining tight positioning accuracy and rigidity. The most common types are:
| Bearing Type | Best For | Key Strengths |
| Crossed Roller bearing | Wrist, elbow, high‑precision joints | Multi‑load, ultra‑rigid, compact |
| Angular Contact Ball bearing | Servo motors, medium‑load joints | High speed, precision, pairable for rigidity |
| Four‑Point Contact bearing | Space‑constrained rotary joints | Bidirectional axial load, thin profile |
| Flexible (Harmonic) bearing | Harmonic reducer joints | Elastic deformation, high reduction ratio |
| Deep Groove Ball bearing | Low‑load, auxiliary axes | Low cost, low friction |
