Food processing production lines, pharmaceutical machinery, medical automation equipment, offshore small machinery and aquatic processing equipment continuously operate under complicated environments with abundant moisture, frequent water washing, spray of acid-base detergents and salt spray erosion. Ordinary carbon steel bearings have weak anti-rust performance. After contacting water, salt, weak acid and weak alkaline cleaning agents, oxidation and rust will form on the surface within a short period. Falling rust particles may contaminate raw materials, which not only leads to bearing jamming and failure and greatly shortens service life, but also brings serious hidden dangers such as failure to meet food safety and pharmaceutical cleanliness standards. A large number of food and medical equipment need regular high-pressure flushing and disinfection. Traditional bearings have limited sealing capacity, water vapor easily penetrates into bearings, destroys lubricants and accelerates wear of rolling elements and raceways. Equipment has to be shut down frequently for bearing replacement, which continuously increases operation and maintenance costs of production lines.

At the same time, marine supporting machinery and aquatic processing equipment are continuously attacked by salt spray and splashing seawater. Conventional bearings cannot resist chloride ion corrosion. When equipment runs outdoors or in humid water environment for a long time, failures including surface pitting corrosion, increased rotation resistance and abnormal operating noise easily occur. Strict material specifications are adopted in clean production industries, and rust debris generated by parts is prohibited from polluting finished products. Ordinary bearing materials cannot satisfy clean production specifications. The industry is in urgent demand of stainless steel precision bearings with long-term anti-rust and acid-salt spray corrosion resistance, adapting to frequent water washing and disinfection conditions, balancing flexible rotation and load bearing capacity, and meeting anti-corrosion and clean application demands of food, medical and marine equipment.

NMT Stainless Steel Deep Groove Ball Bearings are manufactured with high-quality stainless steel substrates. Benefiting from the natural anti-rust and anti-corrosion characteristics of stainless steel, the bearings effectively resist erosion caused by water vapor, salt spray, weak acid and alkaline cleaning agents, and greatly relieve rusting problems under humid and water-washing working conditions. The inner rings, outer rings and steel balls of complete bearings are all processed from stainless steel, avoiding galvanic corrosion caused by mismatched different materials and improving overall rust resistance comprehensively. Diversified sealing schemes are available, including open type, metal shield sealing and rubber contact sealing. Rubber sealed versions can block cleaning water, detergents and impurities from entering bearing cavities, suitable for high-pressure spraying and repeated flushing and disinfection scenarios.

Raceways receive precision grinding treatment with smooth and uniform surface, low rolling resistance and stable smooth operation. Multiple lubricating media including food-grade grease and general long-life grease can be filled inside. Food contact special lubricants can be selected for food processing and pharmaceutical equipment to comply with relevant clean production specifications. All products adopt international standard dimensions with excellent interchangeability. Various conventional stainless steel bearings can be replaced directly without modification on equipment mounting structures, making upgrading of new and old equipment easy to realize. Featuring compact structure, the bearings can bear radial loads and bidirectional light axial loads simultaneously with outstanding versatility, covering light and medium load clean anti-corrosion transmission scenarios.

Core Product Advantages

All components integrally manufactured of stainless steel material, resisting erosion from water vapor, salt spray, weak acid and alkali, extending bearing service life under humid and water-washing environments significantly;

Multiple optional sealing structures. Contact rubber seals effectively block cleaning liquid and dust from invading bearings to adapt to regular water flushing and disinfection of equipment;

Precisely ground raceways deliver low rotation resistance, stable low-noise operation and guarantee continuous stable running of automation equipment;

Compatible with food-grade lubricating grease to satisfy clean production standards of food processing, pharmaceutical and medical industries and avoid pollutant generation;

Standard universal dimension system with good interchangeability, convenient replacement during equipment renovation to cut working hour and maintenance costs;

Capable of bearing radial loads and bidirectional light axial loads simultaneously, suitable for most light-duty automatic rotary transmission structures with wide application range;

Stable material hardly produces rust debris to prevent contamination of raw materials, medicines and aquatic products, complying with control requirements of clean production industries.

Typical Application Scenarios

Conveying mechanisms of food processing production lines, baking machinery and beverage filling equipment; automatic pharmaceutical production lines, medical testing instruments and small medical transmission equipment; aquatic processing machinery, auxiliary transmission devices around seawater and small offshore automation equipment; laboratory testing instruments, cleaning equipment and clean packaging production lines; outdoor small automation devices, rotating units of humidifying and atomizing equipment.

Quality Assurance

NMT Stainless Steel Deep Groove Ball Bearings adopt full-process standardized quality control. Stainless steel raw materials are tested for material composition and hardness after incoming inspection, and unqualified raw materials are eliminated. Independent inspection nodes are set in each procedure including ring machining, precision raceway grinding, steel ball sorting, stabilization heat treatment and sealing assembly. After assembly, finished products receive rotation flexibility testing, salt spray corrosion resistance simulation testing, dimensional precision verification and sealing waterproof performance testing. Products failing to meet corrosion resistance and precision standards are rejected strictly. It ensures bearings supplied to customers can work stably in humid, water-washing and salt spray environments for a long term. Reliable anti-corrosion bearing matching solutions are steadily provided for manufacturers of food, medical and marine equipment.

Product Range

Open stainless steel deep groove ball bearings, single-sided metal shield stainless steel bearings, double-sided metal shield stainless steel bearings, double-sided rubber sealed stainless steel bearings. Professional selection suggestions are offered according to load capacity, flushing frequency, corrosion environment grade and cleanliness requirements.

Brand Strength

NMT has long been engaged in R&D and manufacturing of anti-corrosion precision bearings. Targeting industrial pain points such as clean working conditions of food and medical industry, marine salt spray corrosion and frequent water washing disinfection, NMT continuously optimizes stainless steel processing technology, surface finishing standards and sealing structure design. The brand keeps improving bearing corrosion resistance, rotation precision and sealing protection effect, helping equipment manufacturers solve common problems including easy rusting, short service life and product contamination of bearings under humid corrosive environments. It reduces component replacement frequency and maintenance investment of automatic production lines and supports long-term stable operation of various clean equipment and marine machinery.