How to install four-point contact ball bearings

Four-point contact ball bearings are designed to handle axial loads in both directions and moderate radial loads. They are commonly used in applications requiring combined loading (axial and radial) and where space is limited. 

Four-point contact ball bearing installation guide

1. Preparation

Ensure the bearing, housing, and shaft are clean, free from any debris, dirt, or burrs that could affect performance.

Check the parts for any damage or imperfections.

Apply a thin layer of high-quality grease or lubricant to the seating surfaces to ease installation and prevent corrosion.

2. Align the Bearing

Align the bearing with the shaft or housing properly before applying force. Misalignment during installation can lead to excessive load, resulting in premature wear.

Note the direction of loading: four-point contact bearings have a split inner or outer ring, and the load should be directed through the split points.

3. Apply Pressure

Use a press or other controlled method to push the bearing into place.

For a bearing installed onto a shaft, apply pressure only to the inner ring to avoid damage to the rolling elements or the cage.

For a bearing pressed into a housing, apply pressure to the outer ring.

4. Adjust Axial Play

Four-point contact bearings require precise axial play, as excessive preload or clearance can impact performance.

Verify axial play according to the manufacturer's specifications and adjust as needed using spacers or by tightening retaining nuts if applicable.

5. Lubrication

Apply the recommended amount of grease or lubricant if this hasn’t been done prior.

For grease-lubricated bearings, fill 30-50% of the free space in the bearing with grease; for oil-lubricated bearings, ensure proper oil levels.

6. Check for Smooth Operation

After installation, rotate the bearing assembly manually to ensure smooth operation without unusual resistance, noise, or binding.

Ensure there are no signs of misalignment or uneven wear.

Tips

Avoid excessive force during installation to prevent damaging the bearing.