I. Bearing Friction: The "Silent Cost" Underestimated in Industrial Energy Consumption

Global industrial motors consume approximately 45% of the electricity. Among this huge energy consumption, bearing friction is one of the main sources of mechanical losses. A motor, a fan, or a pump consumes additional electrical energy every day to overcome the rolling resistance within the bearings. This is not a one-time consumption but an ongoing energy loss every minute of the equipment's operation.

 

Research data indicates that bearing failures can cause a 1.5% reduction in efficiency for motors under full-load conditions and a 4% reduction under light-load conditions. This means that a bearing that has not fully failed but shows early wear is quietly consuming energy that exceeds its own value. Before the bearing completely fails, it may have consumed several times more energy than its own value.

 

Low-friction bearings refer to a class of high-performance bearing products that effectively reduce the friction coefficient and energy loss during operation through structural optimization, material upgrading, and lubrication innovation. Compared to traditional bearings, low-friction bearings have significant advantages in terms of starting torque, operating temperature rise, energy consumption level, and service life. The global sales of low-friction bearings reached 6.813 billion yuan in 2025 and are expected to reach 9.66 billion yuan in 2032, with a compound annual growth rate of 5.1%.

 

II. From "Friction" to "Energy Consumption": An Underestimated Causal Chain

The friction torque of bearings decreases by one percentage point, and the energy loss of the motor decreases by one percentage point. Low friction means less energy consumption - in the field of new energy vehicles, the electric drive system has extremely high requirements for transmission efficiency and noise control. Low-friction bearings can effectively improve the range and improve NVH performance.

 

Leading enterprises in the industry have achieved significant breakthroughs in this field. Schaeffler has launched high-performance C series deep groove ball bearings, with optimized roll surface parameters and manufacturing accuracy, the overall friction level of these bearings is 30% lower than the industry average. SKF energy-saving deep groove ball bearings are specifically designed for small industrial motors, reducing 25% or more of the friction torque, while improving motor efficiency, extending bearing life, and reducing 25% or more of carbon dioxide emissions. SKF E2 deep groove ball bearings have reduced bearing friction losses by 30-50%. NTN has developed low-friction hub bearings that reduce rotational friction by up to 64%.

 

In the efficiency optimization of hydraulic pumps and hydraulic motors, by using low-friction bearings and optimizing preload, system efficiency can increase by approximately 2%. In the electric drive system of new energy vehicles, reducing bearing friction by 30-50% has become a standard configuration in the industry.

 

III. NMT Low Friction Technology System: Systemal Reduction of Resistance from Microscopic to Macroscopic

The NMT low-friction energy-saving bearing technology system covers every link from materials to manufacturing.

 

Nanometer-level ultra-finishing and surface smoothness control - The raceways of NMT bearings undergo nanometer-level ultra-finishing, with surface roughness controlled within 0.01 μm. A smoother raceway surface means less contact resistance between the rolling elements and the raceway, and lower frictional heat generation. Under the same working conditions, the friction torque of NMT bearings is significantly lower than the industry average. It performs particularly well in low-friction demand scenarios such as precision grinding machines and high-end household appliances.

 

Optimizing internal geometry and cage design - NMT optimizes the cage structure through dynamic characteristic simulation to keep the rolling elements in the best position during operation, reducing unnecessary sliding friction. NMT introduces micrometer-level fluid dynamic pressure grooves between the cage and the guide surface. When the bearing rotates, these grooves act like miniature pumps, drawing lubricant to the contact interface, converting the sliding friction between the cage and the guide surface into fluid friction, reducing the friction coefficient by one order of magnitude. In conjunction with NMT's strict screening of the consistency of rolling body dimensions and precise calculation of the lubricant dosage, the bearings can maintain a low-friction and low-noise operation state even when restarted after high-speed operation or prolonged idling. The self-lubricating steel balls independently developed by NMT have reduced the friction coefficient to 0.0015, and the operating noise has been controlled within 20 dB.

 

Wide temperature range lubrication - NMT bearings are filled with long-lasting low-volatile lubricating grease, maintaining stable viscosity characteristics within the wide temperature range of -45°C to 155°C. The grease does not solidify at low temperatures or thin out at high temperatures - whether the equipment is cold-started in the northern winter or continuously operated in the southern summer, the grease can provide a stable lubricating film, avoiding increased friction due to fluctuations in lubrication status. The maintenance cycle can reach up to 30,000 hours, reducing additional energy loss caused by lubrication maintenance downtime.

 

Special heat-stabilization treatment and long service life - NMT uses vacuum degassing high-carbon chromium bearing steel, and after special heat treatment, the surface hardness reaches HRC 62-64, improving the anti-wear performance by 40%. The rolling surface of the raceway is less prone to wear during long-term operation - the less wear, the smaller the change in the friction coefficient, and the slower the energy efficiency decline. The fatigue limit is improved by 38% compared to ordinary products, and the rated life is increased by more than twice the industry standard.

 

IV. Realistic calculation of energy-saving benefits: How much can a single equipment save?

Take an industrial fan with a rated power of 100kW as an example. Assuming an annual operation of 8,000 hours and an electricity cost of 0.6 yuan per kilowatt-hour. The mechanical loss caused by bearing friction accounts for 2%-5% of the motor input power, and taking the average value of 3% for calculation - the annual additional electricity consumption due to bearing friction is approximately: 100kW × 8,000h × 3% = 24,000 kilowatt-hours, equivalent to an electricity cost of approximately 14,400 yuan per year. If the bearing friction torque is reduced by 30%, the annual electricity savings can be approximately 4,320 yuan. For a fan operating for 10 years, the electricity cost alone can save over 40,000 yuan - this does not include the cost reduction from extended bearing life and the saving in maintenance hours.

 

In the context of continuously rising carbon trading prices, the carbon emission reduction benefits brought by energy reduction are also not to be ignored. SKF's data shows that low-friction bearings can reduce carbon emissions by more than 25%. In typical operating conditions, a reduction of 20% in friction means that up to 145 kilowatt-hours of energy can be saved annually. For factories with hundreds of motors, this figure multiplied by the number of devices amounts to a considerable cost savings and carbon emission reduction.

 

V. Full life cycle perspective: The long-term value of low friction

The selection of bearings should not only consider the purchase price, but also assess the total life cycle cost (LCC). The purchase cost is just the tip of the iceberg - the real majority lies in every day of the equipment's operation.

 

Low-friction bearings optimize the total life cycle cost through three dimensions: reducing energy consumption, extending service life, and reducing maintenance frequency. By using low-friction bearings in the main shaft of a fan, annual energy savings can reach tens of thousands of kilowatt-hours. For enterprises that are advancing their carbon neutrality goals, low-friction bearings are a win-win choice that reduces both costs and carbon emissions.

 

VI. Full scenario adaptation: Green transmission from motors to fans

NMT low-friction energy-saving bearings are compatible with various general industrial scenarios:

 

Industrial motors - In medium-sized motors, NMT low-friction deep groove ball bearings significantly reduce the friction torque through optimized internal geometry and ultra-precision grinding, helping the motor achieve a higher energy efficiency level.

 

Fans and pumps - Continuous operation equipment is most sensitive to energy consumption. The low-friction design of NMT bearings has the most significant energy-saving benefits in scenarios with annual operation of 8,000 hours or more. The wide temperature range lubricating grease ensures efficient operation throughout the four seasons.

 

Reduction gears and compressors - In heavy-duty transmissions, the low-friction design of NMT cylindrical roller bearings reduces energy loss while bearing high radial loads.

 

VII. Customized Services

NMT offers low-friction structure optimization, customized lubrication for wide temperature ranges, and non-standardized customizations for special sealing solutions. From standard specifications to non-standardized customizations, from material selection to structural optimization, NMT provides precise-matched products and services for every energy-saving scenario. Mainstream specifications have regular inventory, installation dimensions follow industry standards, and they can be directly replaced with imported similar products.

 

VIII. Value Summary

The energy optimization of industrial equipment often starts with the least noticeable components. A reduction of 30% in the frictional torque of a bearing, for a single piece of equipment, might only result in several thousand yuan in annual electricity savings; but for a factory with hundreds of motors, it amounts to tens of thousands of yuan in cost savings and hundreds of tons of carbon emission reduction each year.

 

NMT's low-friction energy-saving bearings are supported by nanoscale ultra-finishing, optimized internal geometry, and wide temperature range lubrication, reducing the frictional torque by more than 30%. This helps industrial motors, fans, pumps, reducers, and other general equipment achieve lower energy consumption, higher energy efficiency, and less carbon emissions. Each rotation becomes more energy-efficient, greener, and more sustainable.