Bearing Torque
Why Bearing Torque Matters
Achieving optimal bearing torque is a multidimensional endeavor requiring thoughtful consideration of design factors coupled with the characteristics of the system in which the bearings will be used. By selecting the right type of bearings, utilizing appropriate materials, implementing proper lubrication practices, managing preload and clearance, fine-tuning design parameters, and accounting for environmental conditions, engineers can effectively minimize bearing torque and enhance the overall efficiency and longevity of mechanical systems. A comprehensive approach to bearing torque optimization can result in smoother operation, reduced energy consumption, and improved system performance.
Types of Torque Measurements Applicable to Ball Bearings
There are a few different aspects to analyzing bearing torque. Balancing which of these aspects of bearing torque will mean the most to your system will help land on the optimal bearing choice and configuration. These include:
- Starting torque, or some times referred to as restraining torque, is the applied torque necessary to start and maintain rotation for a prescribed arc of travel of the rotated raceway member with the other raceway member held stationary.
- Average running torque is the average of the absolute value of running torque in both clockwise and counterclockwise directions.
- Peak running torque is the maximum torque recorded during either clockwise or counterclockwise testing.
- Average torque hash is the average predominant bandwidth recorded for one direction of rotation.
Bearing Torque Influences
Bearing torque can be influenced by many factors. These factors can be grouped into two main categories, design and implementation, where pairing the factors to different bearing types and options will drive optimal performance within your system.
Design: These factors speak to the quality of the components and engineering that go into your bearing choice.
- Bearing internal geometry
- Surface finish
- Internal clearance and preload
- Run-outs and harmonics
- Lubrication
- Cage and seal design
Implementation: These factors speak to the operational and environmental conditions where your system will be deployed.
- Bearing to system fitment
- Applied loads
- Operational rotational speeds
- Temperature
- Cleanliness and or contamination
