Purpose of Preload

The main purposes and some typical applications of preloaded bearings are as follows:

1. To maintain the bearings in an exact position both radially and axially and to maintain the running accuracy of the shaft
   ...... Main shafts of machine tools, precision instruments
2. To increase bearing rigidity
   ...... Main shafts of machine tools, pinion shafts of automotive differential gears
3. To minimize noise due to axial vibration and resonance
   ......Small electric motors
4. To prevent sliding between the rolling elements and raceways due to gyroscopic moments
   ......High-speed or high-acceleration applications of angular contact ball bearings and thrust ball bearings
5. To maintain the rolling elements in their proper position with the bearing rings
   ......Thrust

• Purpose of Preload
• Position Preload
• Constant-Pressure Preload
• Comparison of Position Preload and Constant-Pressure Preload
• Preload of Combined Angular Contact Ball Bearings
• Preload of Thrust Ball Bearings
• Preload of Spherical Thrust Roller Bearings