I. The Next Decade of Bearing Innovation: From "Passive Bearing" to "Active Intelligence"

Bearing technology has been around for over a century, but innovation has never ceased. If the innovation in the past decade focused on "making bearings rotate faster, longer, and more stably", then the innovation in the next decade is transforming bearings from passive mechanical carriers into active intelligent system components.

In 2025, the Chinese bearing industry presented an impressive report card - the total industry revenue reached 246.8 billion yuan, and the output exceeded 2.56 billion sets, both setting new historical highs. However, the growth in scale did not simultaneously solve the technical bottlenecks in the high-end sector. The global high-end bearing market is still dominated by eight international giants, taking up more than 70% of the market share. Domestic substitution has entered a deep-water zone, and the real focus of competition has shifted from "can we manufacture" to "can we innovate".

The cutting-edge directions of bearing innovation are unfolding simultaneously in multiple dimensions: intelligent bearings give bearings the ability to "sense" and "decide"; 3D-printed bearings break the geometric limitations of traditional manufacturing; biomimetic design bearings draw structural wisdom from nature; self-lubricating material bearings completely摆脱external lubrication dependence； air bearings and magnetic levitation bearings have overturned the working mode of mechanical contact.

II. Intelligent Bearings： Let Bearings "Speak" for Themselves

Intelligent bearings are one of the most revolutionary innovation directions in the bearing field. Its core idea is to integrate bearings， sensing units， data processing， and communication modules into an integrated electromechanical equipment -

 

- allowing bearings not only to bear loads but also to sense their own status， diagnose their own faults， and even adjust their operating parameters.

The monitoring indicators of intelligent bearings cover multiple dimensions such as rotational speed/slippage rate， load， vibration， temperature， and lubrication status - 。 By embedding sensor units inside the bearing, the system can accurately capture all the core data of the bearing's operation. It uses algorithms and a fault database to implement graded warnings. Traditional monitoring methods rely on external power supply, have limited installation space, and are difficult to achieve high integration in complex industrial environments. 。 The intelligent bearing integrates the sensing unit directly into the bearing body, resulting in a closer signal source, higher signal-to-noise ratio, and faster response. 1

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From 2025 to 2026, the field of intelligent bearings witnessed a series of landmark breakthroughs. The research team led by Professor Wang Yanxue from Beijing Institute of Architecture developed a non-invasive single-electrode triboelectric bearing sensor (NSE-TBS) that can be directly attached to the surface of the bearing - -

3

。 This sensor is based on the principle of frictional nanogenerators and is capable of directly converting mechanical energy into highly sensitive self-powered sensing signals. 3

。 The experimental results show that NSE-TBS can achieve stable speed tracking, cage slippage detection and fault feature extraction under various operating conditions. 3

。 The team further deployed an FPGA-accelerated one-dimensional visual Transformer diagnostic system, with the inference power consumption being only 4.59W. 3

。

Embedded triboelectric bearings are another groundbreaking achievement. Researchers have devised a solution to integrate triboelectric sensing functionality into actual rolling bearings - achieving self-powered monitoring through the triboelectric effect generated between the rolling elements and the raceways. 1

。 The experiment shows that this sensor can successfully detect local faults in the bearing by analyzing the clear fault characteristics in the current signal. The fault characteristics are highly consistent with the frequency band of the bearing characteristics. 。 Based on the verification using three classic machine learning algorithms, the average accuracy rate of fault classification exceeded 98% - 。 Compared with the reference accelerometer, the frictional electric sensor performs better in frequency domain analysis. 1

。 The research also demonstrated a self-powered wireless demonstration for real-time bearing temperature monitoring, which could be achieved using just one commercial deep groove ball bearing and two copper sheets. 1

-- This means that the practicalization threshold for intelligent bearings is significantly lowering.

In the field of bearing monitoring for freight trains, researchers have proposed a low-power AI monitoring framework that seamlessly integrates the energy collection front-end with the physically interpretable fault analysis back-end, achieving real-time bearing health monitoring. 2

。 The experimental results show that the system has achieved stable self-powered operation and autonomous fault diagnosis under the actual freight train service conditions. 2

。 The autonomous decision-making and self-regulation capabilities of intelligent bearings are pushing equipment maintenance from the "periodic maintenance" model to a new stage of "predictive maintenance".

III. 3D Printed Bearings: A Manufacturing Revolution Breaking Geometric Constraints

Additive manufacturing is changing the design and manufacturing paradigm of bearings. Traditional bearings are limited by processing techniques and have relatively simple geometries. 3D printing enables engineers to design complex internal structures and customized shapes that traditional methods cannot produce.

In 2025, Kyocera's European Fine Ceramics Company announced the start of providing "ceramic additive manufacturing" production technology to European customers - 。 This technology enables the production of products with complex geometries and nearly any customized shapes. Typical applications include medical implants, nozzles, coils and insulators, fluid pipelines, and bearings. 。 By modifying the 3D CAD model, rapid iterative design can be achieved -

 

-- This means that the development cycle of bearings will be shortened from "several months" to "several days".

In 2025, the industrial ceramics field witnessed a milestone breakthrough - the combination of carbon nanotubes and graphene composite toughening technology with 3D printing process successfully solved the century-old problem of "brittle fracture" of ceramic materials - -

23

。 In the aerospace field, 3D-printed silicon nitride ceramic bearings have been widely used in domestic large aircraft, increasing the engine speed by two times. 23

。 The laser sintering equipment can print silicon carbide rocket nozzles with an accuracy of 0.01mm. The bending strength of these nozzles has been increased by 4 times compared to traditional methods, and they can withstand the erosion of 3000℃ high-temperature gas. 23

。 This component has passed the extreme tests conducted by the Aerospace Eighth Institute. By replacing the imported products, the cost has been reduced by 58%. 23

。

3D printing air bearings also demonstrate remarkable prospects. A 3D-printed concept of air hydrostatic bearings achieves a smoother pressure distribution by having a large number of micropores distributed around the bearing. The internal channels connect and supply air. Compared with traditional air bearings, 3D-printed bearings perform exceptionally well in terms of performance, while the air consumption is controlled within a limited range. In the field of ultra-precision ceramic parts, for high-precision applications such as sealing surfaces, optical mounting seats, or bearing raceways, 3D printing is opening up new possibilities. 。

The maturity of ceramic additive manufacturing technology means that in the future, the design of bearings will no longer be limited by "can it be manufactured", but will depend on "whether one dares to imagine".

4. Bionic Design Bearings: Borrowing Wisdom from Nature

After billions of years of evolution, nature has given birth to countless exquisite structures. Bionic design bearings draw inspiration from the biological world and transform the structural wisdom of nature into engineering solutions.

The Wu Cen team from Hangzhou Dianzi University drew inspiration from the microscopic structures of pitcher plants and blood clams and designed a composite surface texture - 38

。 The research team employed the superhydrophobic surface coating technology to develop a bio-inspired composite surface for oil self-pumping on the thrust ball bearing guide surface. 38

。 The experimental results show that this biomimetic composite surface can effectively drive the oil to be transported at high speed in a directed manner. 38

。

Compared with the non-textured bearing, the performance of the self-feeding biomimetic composite textured bearing (BCB) has been astonishingly improved: the oil storage capacity in the channel has increased by 130.5%, the rolling ratio has decreased by 67.2%, the overall bearing vibration has reduced by 55.7%, and the friction torque has decreased by 20.8% - -

38

。 The BCB bearings have a significantly richer secondary oil storage capacity, which greatly improves the lack-of-oil condition of the bearings. 38

。 The research results were published in international journals such as "Tribology International" - 。

The biomimetic water-lubricating bearing based on the structure of marine mollusks achieves excellent performance in load increase and friction reduction by imitating the surface texture and structure of mollusks. 。 The biomimetic functional surface textures have also been utilized to regulate the migration of lubricants and the interface lubrication. Research has confirmed that the surface textures can effectively reduce friction and control the distribution of lubricants. 。 These findings have confirmed the potential of biomimetic surface design in improving point-to-surface lubrication under complex conditions, and it has broad application prospects in aerospace bearings and precision motion systems. 。

The charm of biomimetic design lies in the fact that it does not "invent" new structures in the laboratory, but rather "discovery" the optimal solution from the already verified schemes in nature.

V. Self-lubricating Bearings: A Revolution Beyond the Oil Can

Self-lubricating bearings represent another important innovation path. Its goal is to enable bearings to operate stably and for a long time without relying on external lubrication, relying instead on the material's own lubrication properties.

In 2025, the team from Dalian University of Technology made a significant breakthrough in this field. The team replaced traditional copper alloys with high-performance resin-based composite materials. Based on the design theory of twisted non-planar molecular structure proposed by the team leader, Academician Jian Xigao of the Chinese Academy of Engineering, they successfully developed short-cut carbon fiber reinforced anthracene-biphenyl polyarylene ether self-lubricating functional composite materials. 51

。 After being tested by 6 domestic and foreign institutions, the glass transition temperature of the new material reached over 280℃, the bending strength exceeded 200MPa, the friction coefficient was lower than 0.1, and the wear resistance was improved by 74% compared to traditional materials. -

51

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In the manufacturing process, the team pioneered the "extrusion - molding - machining" composite manufacturing technology, resulting in bearing components with a quality that is only 1/6 of that of copper alloy products, and without the need for additional lubrication coatings. 51

。 During the extreme test organized by the user's unit, the new type of bearing operated continuously at a speed of 12,000 revolutions per minute for 6,000 hours, exceeding the requirements of international leading standards. -

51

。 This achievement has increased the service life of domestic bearings from less than 1,000 hours to 6,000 hours. 51

。 The new material will be widely applied in fields such as the thrust bearings of aircraft engine fuel pumps and the bearing surfaces of large ship thrust bearings. 51

。

Research on polyimide (PI) based composite self-lubricating cages has also made significant progress. PI-based composite materials are considered ideal candidates for manufacturing high-performance self-lubricating cages due to their excellent thermal stability (maintaining performance within the range of -269°C to 400°C). 。 The temperature rise of the new solid cage bearing has been significantly reduced, achieving "ultra-stable" bearing operation. 。 Compared with traditional bearings, the temperature of the bearings equipped with this cage is reduced by 2-3℃, and the peak temperature is reduced by 60% - 。

The thermal-friction synergy effect of PTFE-based self-lubricating cages under no-oil conditions has also been thoroughly investigated - 。 The SF-1 oil-free lubricated bearing employs solid lubrication technology, featuring high load-bearing capacity, low friction, and corrosion resistance. It can operate stably within a wide temperature range of -195℃ to +280℃. 。 Graphalloy® self-lubricating composite graphite-metal material can operate without regular lubrication in high-temperature, chemically corrosive or inaccessible environments. It maintains its performance up to 538°C in an oxidizing environment and up to 400°C in steam. 。

The value of self-lubricating bearings is particularly prominent in extreme environments - in situations where maintenance is impossible or inconvenient (such as in space, deep sea, and nuclear radiation environments), self-lubricating bearings are often the only feasible solution.

Six. Air Bearings and Magnetic Levitation Bearings: The Ultimate Dream of Zero Contact

If self-lubricating bearings are about "reducing friction", then air bearings and magnetic levitation bearings are about "eliminating friction". They completely revolutionize the traditional bearing method that relies on mechanical contact for operation.

In 2025, China achieved a milestone breakthrough in the field of fully dynamic pressure air bearings. This technology abandons the traditional bearing mode that relies on steel balls rolling and grease lubrication, and utilizes the aerodynamic effect generated by the high-speed rotation of the rotor to form a micrometer-scale air film to support the rotor for "levitation" operation. 。 This "zero-contact, no-wear" characteristic has achieved a reduction in dimensions compared to traditional bearings in terms of rotational speed, precision and lifespan.

The fully dynamic pressure air bearing is hailed as the "crown jewel" of the bearing industry. For a long time, this technology has been restricted by international monopolies and bans, and has been a "critical bottleneck" for strategic industries such as aerospace and semiconductor manufacturing in China. This industrialization breakthrough marks a significant technological leap in China's ultra-precision manufacturing field. Enterprises like Gree have also been actively developing radial dynamic pressure air-floating bearing technology - 。 The Institute of Engineering Thermophysics of the Chinese Academy of Sciences and other institutions have conducted research on the design and optimization of gas bearings, and have explored new technologies such as lubrication bearings using supercritical carbon dioxide as the working medium. 。

Magnetic levitation bearings are also advancing rapidly. In July 2026, the "High-speed and High-load Magnetic Levitation Bearings Key Technology" project under the "14th Five-Year Plan" of the National Key Research and Development Program, led by Tianjin Feixuan Technology Co., Ltd., reached a major milestone - the first domestic 1.6MW ultra-high load magnetic levitation bearing prototype was successfully assembled. 。 The project was jointly developed by 8 top domestic universities and research institutions, and overcame several technical obstacles. 。 The rotational speed of the high-speed magnetic levitation bearings for the product exceeds 100,000 revolutions per minute, and the power of the high-load magnetic levitation bearings reaches 1.6MW. The core technical indicators have all reached the international leading level. 。 It will mainly be applied in fields such as high-speed air compressors in the future. 。

Magnetic levitation bearings possess revolutionary advantages such as no contact, zero friction, and no need for lubrication, and are particularly suitable for special environments such as high-speed, vacuum, and ultra-clean conditions. Researchers have also developed a low-power hybrid magnetic bearing system for vacuum molecular pumps - 

 

and an electromagnetic bearing control optimization algorithm based on MPC-SMC - 。 Active electromagnetic bearings achieve rotor non-contact suspension through electromagnetic force, featuring advantages such as no friction and high precision. 。

From the industrialization of full-motion pressure air bearings to the breakthrough of domestic production of 1.6MW magnetic levitation bearings, zero-contact bearings are moving from the laboratory to the industrial field.

VII. The cutting-edge layout of NMT: Making innovation a reality

Although the NMT high and low temperature alternating specialized transmission bearings are based on traditional rolling bearings as their core products, they have always been concerned about and actively laid out the cutting-edge directions of bearing innovation.

In the direction of intelligent sensing, NMT selects temperature-adaptive base materials and optimizes the structure through thermal balance simulation, providing a stable mechanical platform for the integration of intelligent bearings. The real-time state monitoring of the wide temperature range lubrication system can form a data loop with the fault diagnosis algorithm of intelligent bearings.

NMT supports temperature-adaptive base material selection, thermal stability structure optimization, wide temperature range lubrication customization, and special structure non-standard customization, providing precise-matched products and services for every cutting-edge application scenario. Main specifications have ready-made inventory, installation dimensions follow industry general standards, and can be directly replaced with imported similar products.

VIII. Value summary

The innovation in the bearing industry is advancing at an unprecedented speed. Intelligent bearings give mechanical equipment the ability to "sense", 3D printing breaks the geometric shackles of manufacturing, bionic design draws wisdom from nature, self-lubricating materials have bid farewell to the era of oil jars, and air bearings and magnetic levitation bearings have achieved the ultimate dream of zero-contact.

The NMT high and low temperature alternating specialized transmission bearings are precisely the participants and drivers of this innovation wave. From special heat-stabilizing treated steel to thermal balance simulation optimized structure, from wide temperature range lubrication system to full-spectrum sealing solutions, NMT integrates innovation in materials, structure, lubrication, and sealing, providing precise-matched products and services for cutting-edge application scenarios such as intelligent equipment, aerospace, semiconductors, new energy, and extreme environments. Let every rotation be more intelligent, more durable, and more reliable, and let innovation become the most lasting competitiveness of the bearing industry.