Proper maintenance is essential to ensure the longevity and performance of small crossed roller bearings. Here are key maintenance practices:
1. Lubrication
Lubricant Selection:
Use high-quality grease or oil suitable for precision bearings (e.g., low-viscosity synthetic lubricants for high-speed applications).
Common types: Lithium-based grease, PFPE (perfluoropolyether) for extreme conditions.
Lubrication Interval:
Follow manufacturer recommendations (typically every 3–12 months, depending on operating conditions).
High-speed or heavy-load applications may require more frequent lubrication.
Method:
Apply lubricant evenly to rollers and raceways.
Avoid over-lubrication, which can cause overheating.
2. Cleaning & Contamination Control
Regular Inspection:
Check for dust, metal particles, or moisture contamination.
Clean bearings using solvent (e.g., kerosene or alcohol) and soft brushes.
Sealing:
Use shields or seals (e.g., rubber or metal seals) in dusty/wet environments.
Replace damaged seals immediately.
3. Inspection & Monitoring
Visual Checks:
Look for wear, pitting, rust, or discoloration (signs of overheating).
Performance Monitoring:
Abnormal noise or vibration may indicate misalignment or damage.
Measure rotational torque to detect increased friction.
4. Handling & Installation
Proper Tools:
Use precision presses or fitting tools to avoid impact damage.
Alignment:
Ensure shafts and housings are aligned to prevent uneven load distribution.
Preload Adjustment:
Follow manufacturer specifications to avoid excessive preload (causes heat) or looseness (reduces accuracy).
5. Storage
Keep bearings in original packaging in a dry, temperature-controlled environment.
Avoid long-term storage in humid areas to prevent corrosion.
6. Replacement
Replace bearings if:
Excessive play or stiffness is detected.
Raceways or rollers show irreversible damage.
Performance degrades despite maintenance.
Key Maintenance Tips
✔ Use the right lubricant for speed and load conditions.
✔ Prevent contamination—cleanliness is critical for precision bearings.
✔ Monitor regularly to catch early signs of wear.
✔ Follow manufacturer guidelines for installation and service life.
Proper maintenance maximizes bearing life and ensures smooth operation in robotics, CNC machines, and other high-precision applications.
