Although stainless steel bearings are corrosion-resistant and long-life, proper maintenance can further extend their service life, avoid sudden failures, and reduce downtime losses. This article summarizes daily maintenance points and common fault troubleshooting methods.

Core Daily Maintenance Points (Simple and Effective)

1. Regular Cleaning (Anti-Fouling and Anti-Corrosion)
   • Food/humid environment: Rinse with hot water or neutral cleaner weekly, wipe dry, avoid residual acid and alkali.
   • Ordinary environment: Clean surface dust and oil monthly, keep dry.
   • Prohibit grinding with steel wire brushes or sandpaper to avoid damaging the passivation film and accelerating corrosion.
2. Reasonable Lubrication (Key to Reducing Wear and Extending Life)
   • Grease selection: NSF H1/FDA food-grade grease for food environments; high-temperature resistant grease for high temperatures; low-viscosity grease for high speeds.
   • Lubrication cycle: Replenish grease every 3–6 months for ordinary working conditions; every 1–3 months for high-speed/high-temperature/humid working conditions.
   • Dosage control: Fill 1/3–1/2 of the bearing internal space, too much causes heat, too little causes wear.
3. Seal Inspection (Anti-Leakage and Anti-Intrusion)
   • Check if the sealing ring/dust cover is aging, cracked, or deformed during each maintenance.
   • Replace the seal in time if it fails to prevent water vapor, dust, and medium from entering the interior.
4. Avoid Overload and Impact (Prevent Early Damage)
   • Strictly prohibit over-load operation, avoid tight belts, misalignment, and impact loads.

   • Ensure coaxiality during installation to avoid eccentric load causing heat, wear, and abnormal noise.

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Common Faults and Troubleshooting Methods

1. Abnormal Noise/Loud Noise
   • Causes: Insufficient lubrication, impurity intrusion, seal damage, installation misalignment, severe wear.
   • Troubleshooting: Replenish grease, clean bearings, check seals, correct installation, replace if severely worn.
2. Abnormal Heating
   • Causes: Too much/too little lubrication, high-speed overload, tight installation, seal friction, excessive ambient temperature.
   • Troubleshooting: Adjust lubrication amount, reduce speed/load, check installation tolerance, replace low-friction seals, improve heat dissipation.
3. Rotation Sticking/Inflexibility
   • Causes: Rust (rare), impurity jamming, dry lubrication, cage deformation, overload plastic deformation.

   • Troubleshooting: Clean, replace grease, check cage, replace bearings if severe.

2. Rust Spots on Surface
   • Causes: Long-term contact with strong acid/concentrated salt spray, damaged passivation film, water intrusion due to seal failure, improper material selection.

   • Troubleshooting: Improve seals, replace adapted materials (316 instead of 304), surface passivation treatment, avoid strong corrosive environments.

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Maintenance Taboos (Never Do)

• ❌ Soak and clean with strong acid and alkali for a long time.
• ❌ Replace food-grade grease with ordinary industrial grease.
• ❌ Force operation under overload, impact, or installation misalignment.

• ❌ Continue to use after seal damage without timely replacement.

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