18 Inch Four Point Contact Ball Slewing Ring Bearing With Outside Gear For Heavy Duty Industrial Applications 458 By 662 By 80 mm Large Diameter High Load Capacity Rotary Bearing For Precision Machinery And Heavy Equipment

18-Inch Four-Point Slewing Bearing with External Gear (Single)
✔️ OD 689 mm (27.13 in), bore 458 mm (18.03 in)

This heavy-duty slewing bearing supports large, slow-turning platforms such as cranes and wind turbines, delivering stable rotation and high-load handling in tough industrial setups.

✅ Outside diameter: 689 mm (27.13 in)
✅ Shoulder diameter: 662 mm (26.07 in)
✅ Bore: 458 mm (18.03 in)
✅ Width: 80 mm (3.15 in)
✅ Four-point contact slewing bearing with outside gear
✅ Gear parameter values: Dp 20, De 18, D 16, d 4
✅ Normalizing force: 0.5 KN; Slack Quench: 0.9 KN
✅ Suitable for heavy-duty cranes and wind-tower platforms

💡 What is a four-point contact slewing bearing used for in heavy machinery?

Handy rotational support for large platforms like cranes and wind turbines.

- Supports radial and axial loads in a compact ring
- External gear interface lets drive systems engage and rotate the load
- Built to withstand long hours in harsh industrial environments