Industrial air compression equipment such as screw air compressors, reciprocating compressors, boosters, process compressors and oil-free air compressors are core basic equipment for factory air supply, power transmission, chemical pressurization and precision equipment air supply. They operate under harsh working conditions of 24-hour uninterrupted high-frequency circulation, high-pressure heavy load, continuous compression heat accumulation, internal oil-gas mixture immersion and scouring, periodic reciprocating impact vibration and closed high-temperature heat accumulation. As the core of the whole factory's power air source, air compressor units will directly cause excessive temperature rise, abnormal noise and jitter, rotor stalling, insufficient pressure or even complete shutdown once the bearing fails, resulting in factory-wide air cut-off and production line shutdown and huge production capacity losses. Ordinary cylindrical roller bearings cannot adapt to the extreme operating environment of air compression equipment, becoming a common industry pain point. The continuous high-pressure operation of compressor rotors generates stable heavy loads and high-frequency alternating loads. Ordinary bearings have insufficient matrix strength and are prone to raceway fatigue peeling and plastic deformation under long-term cyclic stress, leading to eccentric rotor operation and reduced compression efficiency. Air compression generates a large amount of compression heat, which accumulates continuously inside the closed unit. Conventional bearings have limited heat resistance. High temperature accelerates grease oxidation, coking and drying failure, easily causing bearing dry friction and seizure. The unit is filled with lubricating oil and gas mixture. Simple seals cannot block oil and gas penetration. Oil and gas continuously erode bearing raceways and rolling elements, causing component corrosion and wear and increased clearance. The periodic piston movement of reciprocating compressors brings continuous impact vibration. Ordinary bearings have poor vibration resistance and stability, with rapid precision attenuation during long-term operation and rising equipment noise. The maintenance process of air compression equipment is cumbersome and time-consuming. Frequent bearing replacement greatly increases enterprise operation and maintenance costs and shutdown losses.

Focusing on the supporting field of industrial compressed power equipment, Japan NMT specially develops heavy-duty high-temperature oil-gas resistant low-vibration long-life cylindrical roller bearings dedicated for air compressors to solve industry pain points of ordinary compressor bearings such as easy failure under high temperature, vulnerable oil-gas corrosion, weak impact resistance, rapid precision attenuation and short service life. Through five core upgrades including high-temperature high-strength alloy base material, closed oil-gas penetration-proof sealing system, anti-corrosion surface passivation technology, high-temperature anti-coking long-life lubrication and vibration load stress equalization optimization, it fully adapts to the high-pressure, high-temperature, oil-gas erosion and high-frequency impact working conditions of various air compressors. It fundamentally solves problems including bearing high-temperature seizure, oil-gas corrosion, vibration wear and precision failure, stabilizes rotor operation precision and equipment air supply pressure, and ensures all-weather stable operation of air compression systems.

Core Product Advantages

1. High-temperature high-strength alloy base material withstands continuous high-pressure heavy loads: Adopting heat-resistant high-strength bearing alloy steel specially for air compression equipment with multiple quenching and tempering strengthening heat treatments to improve structural strength, compression resistance and fatigue stability under high temperature. It bears long-term high-pressure rotor extrusion and high-frequency cyclic loads, effectively restrains raceway deformation and fatigue peeling, and maintains stable rotor operation precision for a long time.

2. Closed oil-gas penetration-proof sealing isolates oil-gas mixed erosion: Equipped with exclusive multi-layer closed sealing structure for air compressors with optimized sealing fitting accuracy. It resists aging and deformation under high temperature, blocks the penetration of internal oil-gas mixture into bearing cavities layer by layer, prevents grease pollution, dilution and deterioration by oil and gas, and reduces internal corrosion and wear failure risks from the source.

3. Oil-gas resistant surface passivation technology enhances corrosion and wear resistance: Exclusive oil-gas corrosion resistant passivation treatment is applied on bearing raceways, rolling elements and inner/outer rings to seal micro-pores on metal surfaces, effectively resist continuous erosion by compressor oil-gas and lubricating media, inhibit pitting and rust generation, delay component wear and aging, and greatly extend service life in high-temperature oil-gas environments.

4. High-temperature anti-coking long-life lubrication prevents dry friction seizure: Custom lubrication formula tailored for closed high-temperature working conditions of air compressors features excellent high-temperature resistance, oxidation resistance and anti-coking performance. It hardly dries, carbonizes or loses efficacy during long-term high-temperature operation, continuously forms uniform and stable protective oil film, avoids bearing overheating and seizure caused by dry friction, and greatly extends maintenance intervals.

5. Optimized vibration load structure ensures low-vibration stable precision operation: Optimizing internal roller arrangement and clearance ratio to precisely adapt to the reciprocating impact and high-frequency vibration working conditions of compressors, evenly disperse local stress concentration, reduce equipment operation vibration and noise, slow down long-term precision attenuation, and guarantee stable air supply pressure and constant compression efficiency of the unit.

Application Scenarios

Screw air compressors, reciprocating compressors, oil-free air compressors, industrial boosters, process compressors, mobile air compressors, chemical special compression units, rotor support and transmission parts of complete factory power air supply equipment.

Precision Quality Assurance

NMT heavy-duty cylindrical roller bearings for air compressors are manufactured strictly in accordance with Japanese industrial power equipment manufacturing standards. Selected special bearing steel with high temperature resistance, impact resistance and oil-gas corrosion resistance undergoes continuous high-temperature durability test, oil-gas medium corrosion test, high-pressure heavy-load fatigue test, high-frequency vibration stability test and long-term temperature rise anti-coking test. The products feature strong load capacity, stable heat resistance, reliable oil-gas proof sealing, low vibration and noise, fully adapting to the harsh working conditions of closed high temperature, high-pressure heavy load, oil-gas scouring and 24-hour continuous operation of industrial air compressors.

Product Range

High-temperature long-life bearings for screw air compressors, impact-resistant low-vibration bearings for reciprocating compressors, precision wear-resistant bearings for oil-free air compressors, high-pressure heavy-load bearings for boosters, oil-gas corrosion resistant bearings for process compressors, customized non-standard heavy-load bearings for air compression equipment.

Brand Strength

Japan NMT focuses on R&D and manufacturing of bearings for industrial compressed power, high-pressure heavy load, high-temperature oil-gas corrosion and high-frequency vibration working conditions, specializing in performance optimization under scenarios of closed high-temperature equipment, oil-gas medium erosion and reciprocating impact load. With Japanese high-temperature steel heat treatment technology, exclusive air compressor oil-gas proof sealing technology and strict high-pressure high-temperature working condition simulation testing system, it accurately solves industry problems of air compressor bearings such as high-temperature coking and seizure, oil-gas corrosion and wear, vibration precision attenuation and frequent maintenance replacement, supplying high-stability, high-temperature resistant, corrosion-resistant and ultra-long-life core transmission bearing parts for global industrial air supply, chemical pressurization and intelligent manufacturing power supporting industries.