Kaydon TR Slewing Ring Bearings

The TR series bearing has three independent rows of rollers oriented normal to the direction of loads being transmitted through the bearing. Their orientation is selected to optimize capacity, provide low frictional resistance and minimize deflection.

The top and bottom rows of rollers transmit any opposing thrust loads and combine to transmit any moment loading, while the middle row transmits any radial loads. The rollers, the separator configuration used for each, and the mating raceways are sized to meet load or other application requirements.

In order to obtain these performance benefits, the supporting structures must satisfy higher stiffness and lower flatness requirements than those for similar sized XT or DT series bearings.

Gear teeth or other drive mechanisms can be provided on the inner or outer support ring, and the choice of hole pattern can be added for bearing retention.

Applications

TR series bearings have been used successfully in heavy-duty applications requiring extra stiffness and capacity including:

• Radar
• Cranes
• Mining shovels
• Stackers and reclaimers
• Heavy mill equipment
• Tunnel boring machines

The features of Kaydon’s TR slewing ring bearings are as follows:

1. Three-Row Roller Design: The TR series slewing ring bearings are likely to feature a three-row roller design, with independent rows of rollers oriented normal to the direction of loads being transmitted through the bearing.
2. Optimized Capacity and Low Friction: The roller orientation is selected to optimize capacity, minimize frictional resistance, and reduce deflection, enhancing the bearing’s overall performance.
3. Load Distribution: The top and bottom rows of rollers are likely to transmit opposing thrust loads and combine to transmit moment loading, while the middle row transmits radial loads, ensuring efficient load distribution.
4. Customized Sizing: Rollers, separator configurations for each row, and mating raceways may be sized according to load and application requirements, providing a tailored solution.
5. Higher Stiffness and Precision Requirements: To achieve the performance benefits of the TR series, the supporting structures may need to meet higher stiffness and precision requirements compared to similar-sized XT or DT series bearings.
6. Gear Teeth and Drive Mechanisms: The TR series slewing ring bearings may allow for the addition of gear teeth or other drive mechanisms on the inner or outer support ring.
7. Hole Pattern for Retention: The choice of a hole pattern for bearing retention might be included, ensuring secure placement and operation.