Ball Bearing Slew Ring Bearings
Ball Bearing Slewing Ring Bearings with diameters up to 12.205 inches (310 mm). With deep groove raceways and larger balls, these bearings handle high moment, thrust, and radial loads, ensuring smooth rotation. These bearings feature enhanced sealing systems, including larger seals and dust covers, to protect against contaminants and retain lubrication. Both rings are made from durable steel for reliability in tough environments. Also known as slewing bearings or slew rings, these are used for precise rotational motion in robotics, medical equipment, and wind turbines. The MT Series is in stock.
The bearing comprises an inner and outer ring made of medium carbon steel. Each ring features at least one precision raceway designed to transfer loads and relative motion between different equipment structures.
Hardened chrome alloy steel balls act as the rolling elements, facilitating relative rotation and load transmission between the inner and outer rings.
Plastic spacers separate the rolling elements and are engineered to reduce friction, skidding, and jamming during rotation, which can result from load distribution and distortion of the mounting structures and bearing rings during equipment operation.
Slewing ring bearings have uniformly spaced through holes. If a special bolt pattern or tapped hole is required, contact our application engineers.
Each side of the slewing ring bearings is equipped with an elastomer seal to retain lubricant and protect the bearing from dust and small particle contamination. These seals are compatible with most general-purpose lubricants containing mineral oil and greases with lithium or calcium thickeners.
A hole is drilled into the non-geared ring to allow the balls to be loaded into the final slewing ring assembly. This hole is then sealed with a taper pin. Removing the load plug will void the warranty.
Some series of Slew Ring Bearings have gears on the inner or outer ring.
A grease fitting is provided in one of the bearing rings for periodic lubrication of the raceway and internal components, with larger bearings having more fittings.
The bearing part number and serial number are located next to the filler plug.