Main Applications and Features
Rolling Bearings in Screw Compressors
These bearings are a key component in Atlas Copco's mainstream models (such as GA and G series), mainly used to support the screw rotor shafts.
They are mostly composed of high-precision angular contact ball bearings or cylindrical roller bearings, which can not only withstand the radial loads during rotor rotation but also balance the axial thrust (especially the axial force generated by the meshing of the male and female rotors in double-screw compressors).
The bearing accuracy usually reaches P5 level or above, and with precise rotor processing and assembly techniques, it can effectively reduce vibration and noise and ensure the stability of the gap between the rotors (which directly affects the compression efficiency).
Some high-end models use lifetime lubrication bearings, which reduce maintenance requirements through special sealing designs and long-lasting lubricating grease.
Motor and Drive System Bearings
These bearings are used to drive auxiliary components such as motors and fans. They mostly use deep groove ball bearings, with the following characteristics:
Low friction coefficient, suitable for the high rotational speed requirements of motors (usually 3000-6000 r/min).
Some dust-proof and oil-proof capabilities, suitable for the oil and gas environment inside the compressor.
Special bearing selection for specific conditions
For high-pressure, variable-frequency or explosion-proof Atlas Copco compressors, the bearings will be strengthened:
Temperature resistance: Use high-temperature stability lubricating grease to adapt to working environments above 120℃.
Load-bearing capacity: Select thick rollers or reinforced cage designs to cope with heavy loads in high-pressure conditions.
Corrosion resistance: Some models' bearing surfaces undergo special coating treatment to adapt to humid or dusty environments.
Replacement and Maintenance Suggestions
It is recommended to preferentially use original factory parts: Non-original bearings may have accuracy deviations or material differences. Long-term use may lead to abnormal rotor clearance, increased vibration, and even cause severe faults such as screw rod wear and motor overheating.
Strictly follow installation specifications: When replacing bearings, use specialized tools (such as bearing heaters and tensioners) to avoid violent disassembly; before installation, clean the shaft neck and bearing seat to ensure there are no impurities.
Cooperate with regular maintenance: During the maintenance cycle of the air compressor (usually every 4000-8000 hours of operation), check the clearance, temperature, and abnormal sounds of the bearings, and replace the aged lubricating grease (if it is not a lifetime lubrication type) in a timely manner.
Record operating data: Use Atlas Copco's intelligent monitoring system (such as Elektronikon®) to track bearing temperature, vibration trends, and issue early warnings for potential faults.
If you need to replace the rolling bearings of an Atlas Copco air compressor, it is recommended to contact its authorized service center or a regular dealer to ensure the authenticity of the parts and the professionalism of the installation, and to guarantee the long-term stable operation of the equipment.
