Double-row ball slewing bearing
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Here are some key facts about Double-row ball Slewing Bearings:
- Consist of two rows of spherical balls between inner and outer races.
- The double row design allows for very high load handling capacity.
- Can support combined axial, radial, and moment loads.
- Larger bearings used in applications like cranes, offshore platforms, and heavy equipment.
- Diameters range from 2 inches up to giant bearings over 25 feet.
- Provide precise rotational positioning, low friction, and high stiffness.
- Require proper preload to distribute load evenly between the rows of balls.
- Offer high durability with optimal internal geometry and materials.
- Designed to accommodate misalignment between connected components.
- Can be open or sealed type bearings depending on environment.
- Allow continuous rotation up to several hundred RPM.
- Grease lubrication is common but some larger bearings use oil lubrication.
- Multiple mounting configurations possible to suit application interfaces.
- Regular maintenance required for lubrication and inspection.
In summary, Double-row ball slewing bearings are a robust bearing design capable of handling very high loads and torque for large rotating applications demanding long service life.