I. Deep Blue Racing Track: The Billion-Dollar Market for Ship and Marine Engineering Bearings

When people talk about bearings, their attention often focuses on land-based applications - wind power, robotics, automobiles. However, 71% of the Earth's surface is covered by the ocean, and a vast and equally promising bearing market is emerging: ship and marine engineering.

The continuous expansion of global shipping, the rapid extension of the LNG industry chain, and the accelerated development of deep-sea oil and gas resources exploration - these trends are jointly driving the rapid growth of the ship and marine engineering bearing market. The global market size of wind power bearings is approximately 6.863 billion US dollars in 2025 - while the scale of the ship and marine engineering bearing market is equally significant and has a steady growth rate. The global aerospace bearing market has reached 14.2 billion US dollars in 2025 - ship and marine engineering, as another "major heavy equipment" gathering place, also has no negligible demand for high-performance bearings.

The application scenarios of ship and marine engineering bearings are widespread: ship power systems (main shaft bearings, stern shaft bearings, intermediate bearings), LNG cryogenic pumps and liquefaction devices (submersible pump bearings in extremely low-temperature environments), deep-sea oil and gas equipment (underwater production systems, drilling equipment bearings), marine engineering platforms (lifting equipment, mooring system's slewing bearings). Each scenario has its unique temperature fluctuation challenges.

The common feature of these scenarios is: large temperature difference span, strong environmental corrosion, and extremely high reliability requirements. Once the bearing fails during navigation or operation, the maintenance cost is high, the downtime loss is huge, and it may even trigger safety accidents.

II. Ship Power Bearings: The "Deep Sea Test" from Stern Shaft to Main Shaft

The ship power system is the "heart" of the ship, and the bearing is the most crucial "valve" of this heart. From stern shaft bearings to main shaft bearings, from intermediate bearings to thrust bearings, each link is undergoing multiple tests of seawater corrosion, alternating loads, and temperature fluctuations.

Stern shaft bearings are one of the most harsh scenarios among ship bearings. The part of the stern shaft that extends outside the ship directly contacts seawater, and the bearing not only has to withstand the thrust of the propeller and rotational friction, but also resist the continuous corrosion of seawater. Traditional stern shaft bearings mostly adopt water lubrication or oil lubrication methods, but in extreme conditions, water lubrication bearings are prone to generating more heat, causing the liquid film to rupture and lubrication failure - 。 With the development of large and high-speed ships, the working temperature and load of stern shaft bearings have been continuously increasing, which has raised higher requirements for the corrosion resistance and thermal stability of bearing materials.

The main shaft bearings and intermediate bearings of ships also face severe tests. The main shaft bearings bear the huge torque and thrust output by the engine and generate a large amount of heat during continuous operation. When ships travel from tropical waters to polar waters, the environmental temperature may drop sharply from 30℃ to -10℃, and the bearings experience intense temperature fluctuations. Temperature-induced thermal expansion will change the internal contact state of the bearings and affect the dynamic response characteristics - 。

The cryogenic pump bearings of LNG carriers represent another type of extreme challenge. LNG carriers transport liquefied natural gas in an environment of -162℃. The impeller bearings of these vessels need to operate continuously under the dual conditions of extreme cold and high pressure. Ordinary bearings would undergo brittle transformation at such low temperatures, and conventional lubricating grease would completely solidify and fail. 。 Low-temperature bearings are widely used in industries such as aerospace, energy, research, and healthcare.

 

The LNG transport ship is one of the most typical application scenarios in the energy sector.

 

III. LNG and Low-Temperature Engineering: The Extreme Cold of -162℃

 

The LNG supply chain is one of the fastest-growing segments in the bearings for ships and marine engineering. The continuous growth of global LNG trade volume has led to the construction of a large number of facilities such as LNG transport ships, LNG receiving stations, and liquid chemical plants. The core equipment of these facilities - low-temperature pumps, compressors, and expanders - all rely on bearings that can operate reliably in extremely low temperatures. 。

The LNG submersible pump bearings are a typical example of low-temperature engineering bearings. The submersible pump operates completely submerged in -162℃ LNG liquid, and its bearings need to operate for a long time under extremely low temperatures, high pressure, and without external lubrication conditions. 。 Low-temperature bearings are made of special stainless steel materials, ceramic rolling elements or polymer composite materials, and are equipped with solid lubrication or self-lubrication designs, so as to ensure reliable operation in extremely low-temperature environments. 。 In 2025, there emerged low-temperature bearing products made of high-nitrogen stainless steel materials. 。 The global market size of low-temperature bearings is estimated to be approximately 657 million US dollars in 2025, and is projected to reach 989 million US dollars by 2034. 。

LNG liquefaction plants and receiving stations also extensively use low-temperature bearings. The bearings of the refrigerant compressors in the liquefaction plants need to operate at high speeds in a low-temperature environment ranging from -50°C to -100°C; in the regasification units of the receiving stations, the bearings need to frequently switch between normal temperature and -162°C, experiencing intense temperature fluctuations. During each switch, the bearings have to withstand the dimensional changes and stress impacts caused by thermal expansion and contraction.

The core challenge of low-temperature engineering bearings lies in: the brittle transformation of materials at extremely low temperatures, the solidification failure of lubricants at extremely low temperatures, and the contraction and leakage of sealing systems at extremely low temperatures. Ordinary bearings cannot function at -162°C - the materials become brittle, the grease solidifies, and the seals contract - only specially designed and verified low-temperature bearings can handle the task.

IV. Deep-sea Oil and Gas Equipment: The Triple Test of High Pressure, Low Temperature, and Corrosion

Deep-sea oil and gas development is another highly challenging application area for ship and marine engineering bearings. From the wellheads thousands of meters below the sea to the floating production, storage, and offloading units (FPSO), bearings are subjected to continuous tests in a combined environment of high pressure, low temperature, and corrosion.

The bearings of underwater production systems need to work for a long time in the deep sea, ranging from hundreds of meters to thousands of meters. The temperature in the deep sea is usually 2-4°C, and the pressure can reach tens of megapascals. The chloride in the seawater has strong corrosive effects on the bearing materials. The bearings used in deep-sea oil and gas extraction must simultaneously meet the requirements of corrosion resistance, low-temperature resistance, and high-pressure resistance. The research and development of equipment bearings for extreme environments is continuously breaking through technologies such as sealing, lubrication, and material compatibility in polar and deep-sea scenarios - 。

The swivel bearings of FPSO and offshore platforms also face severe challenges. Key components of the FPSO, such as the mooring system, lifting equipment, and turntable system, all require large swivel bearing components. These bearings are exposed to the combined environment of high humidity, salt fog corrosion, and day-night temperature differences in the ocean, and they need to simultaneously withstand temperature fluctuations and corrosion challenges. 。

The top drive and mud pump bearings of deep-sea drilling equipment are subjected to more extreme working conditions. During the drilling process, the bearings not only have to withstand huge axial and radial loads, but also endure the corrosive chemical substances in the drilling fluid. The drilling equipment repeatedly ascends and descends between the deep sea and the surface, and the bearings undergo repeated temperature cycles from normal temperature to deep-sea low temperatures.

V. Marine Engineering Equipment: Comprehensive Coverage from Platforms to Ships

Marine engineering equipment covers a wide range from offshore oil platforms to specialized ships. The continuous growth of the global marine engineering equipment market provides stable incremental demand for the bearing industry.

Offshore wind turbine installation platforms are one of the fastest-growing sub-sectors in marine engineering equipment. The cranes, lifting systems, positioning systems, and other key parts of wind turbine installation platforms extensively use bearings. These bearings not only have to withstand huge loads but also need to maintain long-term reliable operation in the marine high humidity, salt fog corrosion, and temperature fluctuation environment. The global market size of wind turbine bearing in 2025 is approximately 6.863 billion US dollars - 

Among them, the proportion of offshore wind power is rapidly increasing.

Specialized ships - icebreakers, scientific research ships, rescue ships - have more specific requirements for bearings. The stern shaft bearings of icebreakers need to work in extremely cold seawater below -30℃, while also bearing the impact loads caused by ice layer impacts - 。 The deep-sea detection equipment of the scientific research vessel needs to maintain high-precision operation in the thousands of meters of deep sea. The bearings of these special vessels often require customized design and manufacturing.

Port and wharf equipment - gantry cranes, portal cranes, ship unloader machines - are another important application scenario for marine engineering bearings. Port equipment is exposed to the outdoors for a long time and is constantly subjected to the continuous invasion of sea wind, salt fog, sun exposure, and rain. The slewing bearings and walking wheel bearings of the equipment need to maintain reliable operation in a wide temperature range and high humidity environment.

VI. NMT's Solution: Making Ships and Marine Engineering Bearings "Resistant to Storms"

The design logic of NMT's special high-temperature and low-temperature alternating transmission bearings is precisely matched to the differentiated needs of the ship and marine engineering fields.

For the extremely low-temperature environment of the LNG cryogenic pump - special heat-stable treated steel ensures no brittle transformation or size change at -162℃ extreme low temperatures - 。 Wide temperature range lubrication or solid lubrication solutions maintain the basic lubrication function in extremely low-temperature environments, preventing solidification failure. 。 Special sealing materials suitable for low temperatures maintain elasticity and sealing integrity at extremely low temperatures.

For the high-pressure and corrosive environment of deep-sea equipment - the combination of corrosion-resistant stainless steel and ceramic materials takes into account the requirements of corrosion resistance, low-temperature resistance and fatigue resistance. The optimized sealing structure effectively prevents the invasion of seawater and corrosive media. The special surface treatment process enhances the anti-corrosion and anti-wear performance of the bearings.

For the wide temperature range and alternating loads of the ship's power system - special heat-stable treated steel maintains dimensional stability across the temperature differences in tropical and polar seas. 。 Thermal balance simulation optimization of the structure precisely controls the matching relationship of the thermal expansion coefficients of each component, enabling the bearing to maintain a reasonable dynamic clearance under different sea water temperatures. The optimized lubrication system maintains stable lubrication performance within a wide temperature range.

For the high humidity and salt fog environment of marine engineering equipment - the salt fog-resistant sealing structure in the full-spectrum sealing scheme effectively blocks the invasion of moisture and salt. The corrosion-resistant coating and material selection ensure that the bearing does not rust or corrode in high humidity and salt fog environments. The long-term lubrication scheme extends the maintenance cycle and reduces the operation and maintenance costs in marine environments.

NMT supports the selection of temperature-adaptive base materials, optimization of thermal-stable structures, customization of lubrication systems in wide temperature ranges, and non-standard customization of special structures, providing precise-matched products and services for every ship and marine engineering application scenario. Mainstream specifications are always in stock, and installation dimensions follow industry standards, allowing for direct replacement of imported similar products.

VII. Value Summary

Marine engineering and shipbuilding are an underestimated billion-dollar market segment in the bearing industry. From the extremely cold -162℃ of LNG transport ships to the thousands of meters of high pressure in deep-sea oil and gas equipment, from the wide temperature range of ship power systems to the high humidity and salt fog of marine engineering platforms - every scenario is testing the systematic coordination stability of bearings under extreme temperatures and complex environments.

NMT's high and low temperature alternating specialized transmission bearings rely on special thermal-stable processing steel, thermal balance simulation optimization structure, wide temperature range lubrication system, and full-spectrum sealing scheme to provide reliable transmission guarantees for applications such as ship power systems, LNG cryogenic pumps, deep-sea oil and gas equipment, and marine engineering platforms. Let every ship, every platform, and every set of deep-sea equipment, in the alternating of extreme cold and heat, deep-sea and shallow bay, be able to complete their missions with stable accuracy and long-lasting lifespan. Let "deep sea" no longer be a forbidden zone for bearings.