In the diversified application scenarios of industrial equipment, a large number of equipment operates in harsh and complex working conditions such as long-term damp water accumulation, open-air outdoor environment, coastal salt spray, chemical acid and alkali, food water washing and dust corrosion. Traditional carbon steel ordinary bearings have extremely poor material corrosion resistance. The metal surface is prone to chemical reactions with water vapor, oxygen, salt and acid-base media, resulting in surface oxidation and rusting, pitting and peeling, raceway corrosion pits and steel ball rust spots in a short period of time. Slight rusting will directly cause abnormal operating noise, jitter and stalling, unsmooth transmission and precision deviation of bearings; severe corrosion will lead to internal structural rust locking, lubrication failure, increased wear and complete scrapping of bearings, greatly reducing the operational stability and production safety of equipment.

Especially in scenarios such as seafood processing, coastal equipment, outdoor intelligent equipment, food cleaning equipment, light chemical transmission and humid workshop automatic equipment, the service life of ordinary bearings is often less than a few months, accompanied by frequent problems such as rust locking, equipment shutdown failure, frequent operation and maintenance and high replacement costs. Most ordinary stainless steel bearings on the market have defects such as low material purity, many impurities, unstable rust prevention, rough precision and simple sealing. They can only achieve basic rust prevention and cannot resist the strong corrosion environment of salt spray, acid and alkali and long-term water immersion. After a period of use, subtle corrosion, increased noise, operating stalling and precision attenuation will still occur, which cannot meet the long-term anti-corrosion, precise, stable, low-noise and smooth operation requirements of high-end equipment.

Aiming at the core industry pain points of traditional bearings, including easy rusting in water, easy corrosion in salt spray, easy erosion by acid and alkali, easy locking in humidity, non-durable anti-corrosion and poor precision, NMT has been deeply engaged in the field of anti-corrosion precision bearings. Combined with massive measured data of humid and corrosive working conditions, it has iteratively upgraded the new series of stainless steel corrosion-resistant bearings, achieving all-round optimization from five core dimensions: high-purity anti-corrosion materials, super-precision anti-wear raceways, exclusive anti-corrosion clearance, water and corrosion resistant lubrication and multi-layer sealing protection. It builds an integrated anti-corrosion transmission solution of waterproof and rust-proof, salt and corrosion resistant, precise and low-noise, long-lasting and durable suitable for various harsh working conditions of strong corrosion, high humidity and water vapor.

In terms of materials, all NMT stainless steel anti-corrosion bearings adopt high-purity refined martensitic stainless steel substrates, which are processed through multiple purification, homogeneous heat treatment and stabilized hardening processes. The steel has extremely low internal impurity content, dense and uniform metallographic structure and stable anti-corrosion molecular structure. Compared with ordinary inferior stainless steel and carbon steel materials, this product has excellent oxidation resistance, water rust resistance, salt spray resistance and acid-base erosion resistance. It can withstand long-term water immersion, high humidity water vapor, coastal salt spray and mild acid-base medium corrosion without surface oxidation, pitting corrosion, structural corrosion and material pulverization. Meanwhile, the substrate has sufficient hardness and wear and fatigue resistance, balancing anti-corrosion performance and mechanical transmission performance, completely solving the core problems of corrosion failure and wear scrapping of ordinary bearings.

In terms of process accuracy, the product adopts exclusive micron-level super mirror finishing technology for anti-corrosion bearings. Different from the rough grinding blank process of ordinary stainless steel bearings, the inner and outer ring raceways of bearings undergo multiple fine polishing and super-finishing treatments with accurate and symmetrical curved radian and mirror-smooth inner wall, greatly reducing the friction coefficient. The smooth and regular raceway structure effectively avoids rolling stalling and abnormal noise caused by adhesion of fine impurities and rust accumulation in humid environments. The steel ball rolling track is uniform and stable with balanced stress, ensuring smooth operation without jamming, jitter and eccentric offset throughout the process. Even in long-term corrosive environments, it can maintain ultra-high transmission accuracy and operational stability, realizing precise, low-noise and long-term operation.

In terms of structural clearance, NMT specially optimizes the internal clearance exclusive to corrosive working conditions, fully considering the operation stagnation problems caused by water vapor expansion, impurity adhesion and slight corrosion scaling in humid environments, and precisely calibrates the optimal clearance range. It not only prevents water immersion locking, increased friction and local corrosion wear caused by too small clearance, but also avoids operation shaking, vibration abnormal noise and transmission precision deviation caused by too large clearance, perfectly adapting to the complex working conditions of humidity, corrosion and variable temperature difference, and ensuring that the bearings are still smooth, stable and precise in transmission under harsh environments.

In terms of lubrication system, all series are equipped with imported food-grade long-life water and corrosion resistant lubricating grease, adopting exclusive formula of waterproof isolation, anti-corrosion and moisture resistance, which is insoluble in water, not easy to emulsify and lose, and resistant to damp mildew. The lubricating grease can form a dense waterproof and anti-corrosion oil film on the internal contact surface of the bearing, which can isolate the invasion of water vapor, salt and corrosive media into the friction pair, block the source of rust from the inside, continuously buffer rolling friction, absorb operating abnormal noise and weaken vibration, ensuring low-noise and smooth operation of the bearing. It will not dilute, fail, agglomerate or mildew in long-term water immersion, high humidity and salt spray environments, maintaining excellent lubrication and anti-corrosion effect for a long time, completely solving the common problems of water emulsification, lubrication failure and rapid rusting of ordinary bearings.

In terms of sealing protection structure, the product adopts a multi-layer reinforced waterproof and anti-corrosion sealing structure with high-quality anti-corrosion sealing rubber rings and dustproof and waterproof cover plates to form a multi-layer three-dimensional protection system. With tight fitting and excellent air tightness, it can effectively block the invasion of external ponding, water vapor, salt spray dust and acid-base impurities into the bearing, comprehensively protecting the raceway and steel ball structure from corrosion. The sealing parts are aging resistant, moisture resistant and salt corrosion resistant, not easy to deform, loosen and damage after long-term use, continuously locking the internal clean lubrication environment, eliminating corrosion incentives from the external structure, and greatly extending the durable life of bearings under harsh corrosive working conditions.

In terms of overall performance, NMT stainless steel corrosion-resistant bearings have passed strict salt spray test, water immersion durability test, acid-base corrosion test, high humidity aging test and continuous operation precision test and verification. Their waterproof and rust-proof performance is far higher than that of ordinary stainless steel bearings, with fully upgraded corrosion resistance, precision retention, operation stability and service life. They can operate stably and uninterruptedly for a long time in harsh humid and corrosive environments, perfectly replacing imported high-end anti-corrosion stainless steel bearings.

Core Advantages

1. High-purity stainless steel substrate with super anti-corrosion and rust-proof performance: Made of refined high-purity martensitic stainless steel with stable structure and extremely few impurities, it has excellent waterproof, rust-proof, salt spray resistant and acid-base resistant properties, no oxidation, rust or corrosion in long-term humid and water immersion environments.

2. Mirror super-precision process for precise, low-noise and smooth operation: The micron-level mirror-smooth raceway minimizes friction resistance and ensures uniform and stable steel ball rolling, eliminating stalling and abnormal noise caused by corrosion scaling, realizing low-vibration, low-noise and high-precision operation throughout the process.

3. Exclusive clearance for corrosive working conditions for anti-locking and anti-stagnation: Precisely calibrated clearance adapted to humid and corrosive environments offsets the impact of water vapor expansion and scaling, prevents water immersion locking and friction stagnation, and balances operation smoothness and transmission accuracy.

4. Water and corrosion resistant lubricating grease with long-term non-emulsification: Imported special waterproof and anti-corrosion lubrication formula is waterproof and non-loss, moisture and mildew resistant, salt and corrosion resistant, maintaining stable lubrication effect in long-term harsh working conditions and eliminating lubrication failure.

5. Multi-layer sealing protection for all-round water and pollution isolation: The multi-layer reinforced waterproof sealing structure has excellent air tightness, effectively blocking the invasion of water vapor, salt spray and acid-base impurities, protecting the bearing structure for a long time and eliminating external corrosion incentives.

6. Dual advantages of corrosion resistance and wear resistance with extremely low operation cost: It has both super anti-corrosion performance and excellent mechanical wear resistance, greatly extending the service life under harsh working conditions, reducing frequent replacement and shutdown maintenance, and significantly cutting equipment operation and maintenance costs.

Application Scenarios

NMT stainless steel corrosion-resistant bearings are accurately adapted to various harsh working conditions of high humidity, excessive water vapor, easy water accumulation, salt spray corrosion, acid-base erosion and open-air exposure, covering six core fields: food processing equipment, medical clean equipment, coastal equipment, outdoor intelligent equipment, chemical and light industrial equipment, and humid workshop automatic equipment. In the food processing field, they are suitable for food cleaning machines, food conveying equipment, baking and refrigeration equipment, aquatic processing machinery and food sterile transmission equipment, meeting the industry standards of waterproof, rust-proof, clean and anti-corrosion performance. In the medical clean field, they adapt to medical cleaning equipment, intelligent rehabilitation instruments, laboratory precision instruments and clean medical transmission parts, meeting the strict requirements of cleanliness, no rust and stable low noise in the medical industry. In the coastal field, they apply to coastal outdoor equipment, coastal monitoring instruments, seafood processing machinery and coastal automatic equipment, effectively resisting sea breeze and salt spray corrosion. In the outdoor intelligent field, they fit outdoor monitoring transmission parts, open-air intelligent equipment, garden machinery and outdoor new energy equipment, tolerating wind, rain and humid open-air environments. In the chemical and light industrial field, they are suitable for light chemical transmission equipment, acid-base cleaning equipment, textile water washing machinery and light industrial corrosion working condition equipment, resisting mild acid, alkali and dust corrosion. In the humid workshop field, they adapt to high-humidity workshop automatic modules, water washing assembly line equipment, humid environment conveying machinery and high-humidity clean processing equipment, adapting to long-term high-humidity and water accumulation operation working conditions. All precision transmission equipment with humid, water vapor and corrosion risks can be stably adapted and operated durably for a long time.

Quality Assurance

NMT stainless steel corrosion-resistant bearings strictly follow the Japanese high-end anti-corrosion bearing precision quality control standards and establish an exclusive detection system for corrosive working conditions to control quality layer by layer. Before warehousing, raw materials are subject to one-by-one material purity detection, metallographic structure analysis, hardness stability test and salt spray anti-corrosion pre-test to eliminate inferior substrates with impure materials, substandard anti-corrosion performance and uneven hardness. The whole production process adopts exclusive precision processes for anti-corrosion bearings, including constant-temperature precision forging, multiple stress relief, mirror super-finishing grinding, curved surface precision correction, anti-corrosion grade steel ball selection, working condition exclusive clearance sorting, quantitative oiling of water and corrosion resistant lubricant, multi-layer sealing precise pressing and dust-free precision assembly, with each process meeting the standards of imported high-end anti-corrosion bearings. All finished products undergo 100% full inspection before delivery, including neutral salt spray test, continuous water immersion durability test, high humidity aging test, acid-base corrosion tolerance test, precise operation stability test and sealed waterproof reliability test, eliminating defective products with rust, water seepage, stalling, precision deviation and sealing failure layer by layer. All delivered bearings have excellent performance of super anti-corrosion and rust resistance, waterproof and salt resistance, precise low noise and long durability, which can perfectly replace imported stainless steel anti-corrosion bearings and provide stable and reliable precision transmission guarantee for various equipment under harsh corrosive working conditions.