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How to maintain the double-row ball slewing bearings

Time:2024-11-21 06:58:03 Source:Luoyang MC Bearing Technology Co.,Ltd.

Double-row ball slewing bearings are based on the design of two parallel raceways, in which force transmission and rotary motion are achieved by the upper and lower rows of steel balls or rollers of different diameters rolling in the raceways. This design enables the slewing bearing to withstand large axial forces and tilting moments while maintaining structural stability and rotational flexibility.Maintaining double-row ball slewing bearings is crucial to ensure their optimal performance, longevity, and reliability. 

Double-row ball slewing bearings maintenance

Double-row ball slewing bearings

1. Routine Inspection

Frequency: Conduct visual and operational inspections at least monthly or as recommended.

What to Check:

Physical Damage: Look for cracks, wear, or corrosion on the raceway and balls.

Unusual Sounds: Listen for abnormal noise during operation.

Clearance: Measure axial and radial clearances; deviations may indicate wear.

Smooth Rotation: Check for resistance or stiffness in movement.

2. Proper Lubrication

Type of Grease: Use a high-quality grease as recommended by the manufacturer (e.g., lithium-based grease).

Frequency:

Re-grease every 50-100 operating hours or based on conditions like load and environment.

Increase greasing intervals in dusty, wet, or high-temperature environments.

Procedure:

Rotate the bearing slowly while applying grease to ensure uniform distribution.

Remove old grease and contaminants before applying new grease to prevent contamination.

3. Bolt Tightening

Inspection Interval: Check bolts every 100 operating hours or after heavy use.

Tightening Torque: Use a torque wrench to tighten bolts to the specified values from the manufacturer.

Replacement: Replace worn, loose, or corroded bolts immediately to prevent failure.

Double-row ball slewing bearings

4. Sealing System Maintenance

Inspection: Regularly check seals for wear, damage, or displacement.

Cleaning: Clean the area around the seals to remove debris and contaminants.

Replacement: Replace damaged seals to maintain proper sealing and prevent foreign particles from entering.

5. Load and Alignment Management

Avoid Overloading: Do not exceed the load capacity specified by the manufacturer.

Even Load Distribution: Ensure the load is evenly distributed to prevent localized wear.

Alignment Check: Verify the bearing's alignment with the mounting surfaces to prevent uneven stress.

6. Environmental Protection

Dust and Dirt: Use covers or guards in dusty environments.

Moisture: Apply anti-corrosion coatings in humid or wet conditions.

Temperature: Ensure the operating temperature is within the bearing’s tolerance range.

7. Cleaning and Surface Protection

External Cleaning: Remove any buildup of dirt, grease, or debris on the external surfaces of the bearing.

Corrosion Prevention: Apply protective coatings or paints to prevent rust.

8. Monitor Bearing Wear

Regularly measure wear and tear, especially if the bearing operates under heavy loads or in harsh environments.

Use specialized tools like a dial gauge to measure raceway clearance for early detection of wear.

Double-row ball slewing bearings

9. Documentation

Maintain a detailed log of inspections, lubrication schedules, bolt checks, and replacements.

Document abnormal findings and corrective actions taken.

10. Replace When Necessary

If the bearing shows significant wear, excessive play, or performance degradation, replace it promptly to avoid failure.

Proper maintenance of double-row ball slewing bearings ensures reliability, prevents costly downtime, and extends the bearing's operational life. Let me know if you need specific details on any step!