The following is the daily maintenance plan for parallel shaft F77-55-3KW-4P gear reducer bearings, combining lubrication management, condition monitoring and preventive maintenance measures:
1. Lubrication management
Grease selection and filling
Use lithium-based grease (such as NLGI grade 2), and the filling amount is 1/2-2/3 of the bearing cavity space.
Replenish grease every 3-6 months, shortened to 1-2 months in high temperature or dusty environments.
Lubrication system inspection
Check the oil level window (if equipped) weekly to make sure the grease has not dried out or become contaminated.
Replace the grease immediately if it is found to be discolored (blackened) or contains metal particles.
2. Operating status monitoring
Vibration and temperature detection
Use a vibration meter to detect the bearing parts every day. The effective value of the vibration speed should be ≤4.5mm/s.
An infrared temperature measuring gun monitors the temperature of the outer ring of the bearing, and the temperature rise is ≤25℃ (limited to ambient temperature +40℃).
Sound and abnormal noise judgment
During normal operation, the bearing sound is uniform. If there is a periodic 'rustling' sound (loose fit) or high-frequency noise (raceway damage), the machine needs to be shut down for inspection.
3. Preventive maintenance
Regular disassembly and inspection
Disassemble the bearings every 2000 hours and check the wear of raceways and rolling elements. If the clearance is out of tolerance (>0.05mm), it needs to be replaced.
Use kerosene when cleaning bearings and avoid using wire brushes to damage the surface.
Sealing and Protection
Check whether the shaft end oil seal is aging (replace every 10,000 hours) to prevent dust intrusion.
In humid environments, anti-rust grease (such as containing molybdenum disulfide) should be used.
Note : During maintenance, make sure the reducer is powered off and the coupling protective cover has been removed. If the bearing temperature continues to be >80°C or the vibration value is >7.1mm/s, the machine needs to be shut down immediately for maintenance.
