21 Inch Four Point Contact Ball Slewing Ring Bearing With Outside Gear 528x732x80mm Heavy Duty Rotating Bearing For Large Machinery And Industrial Equipment Ideal For Heavy Duty Cranes And Turntables In Construction And Mining

The 21-inch four-point contact ball slewing ring bearing with outside gear is a heavy-duty rotary bearing designed to support large, slow-turning platforms. It's commonly used on cranes, wind turbines, and other machinery where precise rotation under heavy loads is crucial.

✅ Bore: 528 mm (20.79 in)
✅ Outer diameter: 732 mm (28.82 in)
✅ Width: 80 mm (3.15 in)
✅ Four-point contact ball design with outside gear
✅ Heavy-load, slow-rotation capability

💡 What is a slewing ring bearing used for? A handy solution for rotating large platforms with precision. - Heavy platforms like cranes and wind turbines - Radial and axial load handling with four-point contact - Outside gear versions for direct drive integration - Long life with proper lubrication and sealing