Structural Features and Series Designations
Single-row four-point contact ball slewing bearings use a single gothic-arch raceway that creates four contact points between the balls and raceways. This design allows the bearing to accommodate axial loads in both directions, radial loads and tilting moments within a relatively compact cross-section.
Key Structural Features
- Four-point contact raceway – Enables one bearing to accommodate axial loads in both directions, radial loads and tilting moments.
- Gothic-arch raceway – Provides controlled four-point contact between the balls and raceways for stable rotary operation.
- Steel balls and bearing rings – Bearing steel and forged ring materials are selected according to bearing size, load requirements and application conditions.
- Hardened raceways – Raceway hardening improves wear resistance and supports reliable operation under demanding loads.
- Ball separation system – Cages or spacer arrangements are selected according to bearing design and operating requirements.
- Multiple gear configurations – Available in gearless, external gear and internal gear designs for different drive arrangements.
Series Designation Reference
Single-row four-point contact ball slewing bearings are available in several designation configurations. The series generally identifies the gear arrangement used for the slewing drive:
- 010 series – Gearless design, typically used with an external drive mechanism.
- 011/012 series – External gear design for pinion-driven rotation.
- 013/014 series – Internal gear design for applications requiring a more compact integrated drive arrangement.
For large-size and OEM replacement slewing bearings, dimensions, mounting hole patterns, gear geometry, materials and other design requirements can be manufactured according to original drawings or application conditions.
Learn more about Four-Point Contact Ball Slewing Bearings, applications and selection →