In the basement machine rooms of large commercial buildings, water chillers provide cooling capacity of thousands of kilowatts to entire buildings, with compressors, pumps and cooling tower fans operating day and night. In industrial factory workshops, process cooling systems provide constant-temperature cooling water to production lines, ensuring stable operation of precision manufacturing equipment. In the cold storage of food supply chains, refrigeration systems maintain temperatures below -18°C, preserving food quality through long-term storage. In homes and offices, split air conditioners and multi-split systems provide cool and comfortable indoor environments during hot summers. Air conditioning and refrigeration equipment——the temperature control foundation of modern life and industry——depends on the precision support of bearings for every compression, circulation and heat exchange.

 

The operating mode of air conditioning and refrigeration bearings has distinct industry characteristics. Compressor bearings endure the attack of refrigerant-oil mixtures during high-speed operation, while facing the dual demands of frequent start-stop and long-term continuous operation； fan bearings require low noise, low vibration and long life through long-term continuous operation； pump bearings endure sustained hydraulic loads and potential corrosion risks in circulating water systems. Air conditioning and refrigeration equipment often operates for over 5,000 hours annually, with bearings required to maintain zero-failure reliability through years of continuous operation. At the same time, air conditioning equipment noise levels directly affect building environment comfort and installation compliance——low noise is a core performance requirement for air conditioning bearings.

 

Japan NMT air conditioning and refrigeration bearings are specialized product series developed specifically for the air conditioning and refrigeration industry's stringent requirements for long life, low noise, high energy efficiency and high reliability. NMT air conditioning and refrigeration bearings feature systematic specialized optimization in low-noise design, long-life retention, media corrosion resistance and high-efficiency operation——ensuring stable and reliable rotational support through long-term continuous operation of various commercial, industrial and residential cooling equipment.

 

NMT air conditioning and refrigeration bearings precisely address the core positions of various cooling equipment. Centrifugal chiller compressor bearings utilize high-speed precision angular contact ball bearings or plain bearings, maintaining stable high-speed compressor shaft rotation and precise positioning under cooling capacities of multiple megawatts, withstanding refrigerant gas loads and axial thrust. Screw chiller bearings utilize high-capacity cylindrical roller bearings or spherical roller bearings, withstanding sustained radial and axial combined loads during screw compression, maintaining precise screw meshing and efficient compression. Air conditioner compressor motor bearings utilize low-noise deep groove ball bearings, maintaining low vibration, low noise and long life at high motor speeds. Condenser and cooling tower fan bearings utilize low-noise mounted bearings or deep groove ball bearings, maintaining corrosion resistance, low noise and maintenance-free long life through long-term outdoor continuous operation. Evaporator and air handling unit fan bearings utilize low-noise deep groove ball bearings, maintaining quiet operation in low-noise air conditioning terminal equipment. Circulating water pump and cooling water pump bearings utilize corrosion-resistant stainless steel bearings or mounted bearings, withstanding sustained hydraulic loads in circulating water systems, maintaining stable pump shaft rotation and seal reliability.

 

NMT air conditioning and refrigeration bearings utilize high-purity bearing steel, corrosion-resistant stainless steel or hybrid ceramic options, with customized material selection based on refrigerant type, operating temperature and media characteristics. In conventional refrigerant and refrigeration oil environments, high-purity bearing steel provides excellent fatigue life and dimensional stability； in new environmentally friendly refrigerants (such as R32, R410A, CO₂, etc.) under high pressure and high temperature, corrosion-resistant stainless steel or ceramic materials provide superior chemical corrosion resistance and dimensional stability. Rolling elements undergo precision grouping screening, raceways undergo superfinishing with extremely low friction coefficient to effectively reduce equipment power consumption and improve COP (Coefficient of Performance). Bearing clearance is precisely set with compensation optimization for compressor and motor thermal expansion and high-speed characteristics, maintaining proper internal gaps under various operating temperatures.

 

Low noise is one of the most concerned core performance indicators for air conditioning and refrigeration bearings. In commercial buildings, air conditioning equipment noise directly affects office environment and tenant experience； in residences, air conditioning noise directly affects living comfort and sleep quality； in medical facilities and laboratories, air conditioning noise must be even more strictly controlled. NMT air conditioning and refrigeration bearings achieve ultra-low noise operation through superfinished raceway surfaces, precision-controlled rolling element sphericity and diameter consistency, and optimized cage pocket geometry. Bearing vibration levels meet V3, V4 and above standards. Cages utilize high-strength low-noise engineering plastic with lightweight design to reduce rotational inertia and further suppress operating noise.

 

Sealing and lubrication undergo specialized optimization for air conditioning and refrigeration conditions. NMT air conditioning and refrigeration bearings employ low-friction seal structures——a combination of contact-type rubber seals and non-contact labyrinth seals, effectively blocking refrigerant, refrigeration oil, moisture and dust ingress while minimizing seal friction to avoid additional power loss. Bearings are pre-filled with specialized air conditioning and refrigeration grease featuring excellent oxidation resistance, media dilution resistance and wide-temperature-range stability, maintaining stable lubrication through long-term continuous operation and frequent start-stop, extending maintenance intervals and reducing total lifecycle maintenance costs.

 

Reasons for selecting NMT air conditioning and refrigeration bearings：

 

High-purity bearing steel, stainless steel or ceramic materials for various refrigerant and refrigeration oil environments

 

Customized material solutions precisely matched to refrigerant type, temperature and media characteristics

 

Superfinished raceways and precision-grouped rolling elements for low friction, low power consumption and high energy efficiency

 

Ultra-low noise design with vibration levels meeting V3, V4 and above standards

 

Low-noise engineering plastic cages with lightweight low-inertia design for further noise suppression

 

Precisely set bearing clearance matched to compressor and motor thermal expansion and high-speed characteristics

 

Low-friction seal structures effectively block refrigerant, oil, moisture and dust ingress

 

Specialized air conditioning and refrigeration grease with oxidation resistance, media dilution resistance and wide-temperature stability

 

Long-life design matched to air conditioning and refrigeration equipment's 5,000+ hours annual continuous operation

 

Passed rigorous low-noise and durability testing for centrifugal, screw and scroll compressors, fans and pumps

 

These performance advantages establish NMT air conditioning and refrigeration bearings as the reliable precision components for centrifugal chillers, screw chillers, air conditioning compressors, condenser fans, cooling tower fans, circulating water pumps and various cooling equipment.

 

Application scenarios

 

Centrifugal chiller compressor main shaft bearings

 

Screw chiller screw bearings and thrust bearings

 

Air conditioner compressor motor high-speed bearings

 

Condenser axial fans and cooling tower fan bearings

 

Evaporator and air handling unit fan bearings

 

Circulating water pump and cooling water pump bearings

 

Multi-split air conditioning system compressor and fan bearings

 

Cold storage and refrigeration equipment compressor bearings

 

Precision manufacturing

 

Produced according to air conditioning and refrigeration industry standards and low-noise bearing manufacturing specifications, NMT air conditioning and refrigeration bearings utilize high-purity bearing steel, corrosion-resistant stainless steel or ceramic materials, processed through vacuum degassing treatment, raceway superfinishing, precision rolling element grouping screening, low-noise cage precision forming, low-friction seal precision assembly, specialized grease precision filling, rotational accuracy inspection, noise and vibration testing, refrigerant and refrigeration oil immersion testing and durability life validation——ensuring every product delivers long life, low noise and high energy efficiency.

 

Product range

 

Centrifugal compressor high-speed precision angular contact ball bearings

 

Screw compressor high-capacity cylindrical roller bearings

 

Air conditioner motor low-noise deep groove ball bearings

 

Condenser fan mounted bearings

 

Cooling tower fan corrosion-resistant low-noise bearings

 

Circulating water pump stainless steel bearings

 

Scroll compressor specialized bearings

 

Custom non-standard air conditioning and refrigeration bearings

 

Global industrial service

 

Japan NMT supplies high-quality air conditioning and refrigeration bearings to global cooling equipment manufacturers, central air conditioning system integrators, industrial cooling equipment suppliers and cold storage engineering companies, empowering energy efficiency, comfort and environmental quality in the global air conditioning and refrigeration industry with long-life low-noise high-efficiency precision engineering and long-term stable cooling transmission performance.