Deep groove ball bearings are the most widely used rotary supporting components in industrial applications, commonly equipped on drive motors, cooling fans, industrial water pumps, conveying equipment, household appliances and small reducers. During operation, bearings withstand radial loads and slight bidirectional axial loads simultaneously under extremely diverse working conditions, ranging from constant-temperature clean indoor environments to dusty, humid and slightly corrosive outdoor scenarios. Different from roller bearings, deep groove ball bearings adopt point contact structure with low friction coefficient, outstanding limiting speed and easy noise control. The product series includes open type, double-sided metal shield and double-sided rubber seal variants. Sealed structures effectively prevent dust and moisture intrusion and slow down grease loss and deterioration. As general mechanical equipment develops toward miniaturization, lightweight and low energy consumption, higher standards are raised for bearing running noise, high-speed stability and long maintenance-free service life. Low-cost ordinary deep groove ball bearings suffer from insufficient steel purity and rough raceway machining. Continuous abnormal noise easily occurs after long-time high-speed operation. Poor durability of sealing components leads to rust and premature failure once moisture penetrates. NMT Deep Groove Ball Bearings own complete product portfolio covering miniature, small-medium and medium-large sizes. Open type, dust-proof metal shield and rubber contact seal models are fully available to satisfy full scenarios of light industry, heavy industry and electromechanical supporting.

With continuous upgrading of electromechanical equipment, fans, circulating water pumps and servo motors keep raising rotating speed, while end customers impose stricter requirements on equipment noise control and service life. Many ventilation equipment and fluid pumps require nonstop all-day operation. Bearings stay under sustained temperature rise, which accelerates aging and deterioration of lubricants. Insufficient surface precision of bearing raceways and unbalanced stress on rolling elements will amplify vibration at high rotation speed, generating harsh noise and accelerating fatigue pitting on raceways. Defective sealing design causes continuous invasion of moisture and fine particles and destroys internal lubrication environment. Complete machine manufacturers are in urgent demand of premium deep groove ball bearings featuring high-speed performance, low vibration & noise, reliable sealing protection and long fatigue resistance. Optimized with improved raceway curvature design, NMT Deep Groove Ball Bearings relieve concentrated stress by improving contact state of steel balls. Strict steel smelting and forging procedures reduce internal impurities. High-quality sealing elements enhance dustproof and waterproof capacity, extend lubrication cycle while ensuring stable high-speed rotation, and deliver reliable supporting solutions for various general rotary equipment.

NMT Deep Groove Ball Bearings consist of inner ring, outer ring, steel balls, cages and sealing parts. The arc deep groove raceway structure bears radial loads and moderate bidirectional axial loads at the same time and supports stable high-speed rotation. Open bearings without seals feature excellent heat dissipation, suitable for clean environments and sustained high-temperature working conditions. ZZ metal shield bearings adopt metal dust covers to block dry dust and deliver better high-temperature resistance. 2RS rubber contact seal bearings provide stronger protection against moisture, mud and fine particles, ideal for complicated working environments. Two cage options are available: stamped steel cages for general conditions and solid nylon cages for lower noise and precision silent equipment. Internal geometric parameters are precisely optimized and steel balls are sorted by dimension grades to guarantee smooth and uniform rotation. The products are widely applied in three-phase asynchronous motors, cooling fans, centrifugal water pumps, air compressors, conveyor rollers, textile machinery, food processing equipment and household & commercial electromechanical products.

Inner rings, outer rings and steel balls are manufactured from high-purity bearing steel. Forging refines grain structure. Precise quenching and tempering ensure sufficient hardness on raceway contact surfaces while appropriate matrix toughness resists impact from alternating loads. Superfinishing is carried out on raceway surfaces to reduce frictional resistance and restrain vibration and temperature rise during high-speed operation. All finished bearings pass dimensional precision inspection, clearance classification, noise & vibration testing, high-speed durability test and dust & water tightness test. Products with insufficient precision and excessive noise are eliminated to guarantee consistent mass production performance.

Multiple clearance grades are optional. Standard overall dimensions achieve excellent universal interchangeability for convenient component replacement and upgrading on all types of equipment.

Core Product Advantages

Classic arc deep groove raceway structure withstands radial loads and bidirectional axial loads simultaneously with strong adaptability to combined stress;

Low friction resistance under point contact, high limiting speed, more suitable for continuous high-speed operation compared with roller bearings;

Multiple sealing options: open type, ZZ metal shield and 2RS rubber seal to meet different dustproof and waterproof demands;

Superfinished raceways and high-precision steel balls realize low vibration and noise, perfect for silent motors and ventilation equipment;

Cages in diverse materials: economical and durable stamped cages, nylon cages for further optimized mute performance;

High raw material purity and stable heat treatment deliver good rust resistance and fatigue resistance for long-time continuous operation;

Comprehensive size range including miniature and large industrial bearings, covering civil equipment and industrial machinery;

Standard national overall dimensions with favorable interchangeability for easy maintenance and replacement of general electromechanical equipment.

Typical Application Scenarios

Industrial asynchronous motors, servo motors; cooling fans, centrifugal fans, blowers; clean water pumps, circulating pumps, small chemical pumps; small gear reducers, conveyor rollers; textile machinery, woodworking machinery; automated food processing equipment; air compressors, small refrigeration compressors; power assemblies of household appliances, transmission parts of fitness equipment.

Quality Assurance

Raw materials of NMT Deep Groove Ball Bearings receive sampling inspection on hardness, metallographic structure and non-metallic impurities upon warehousing to control raw material quality fundamentally. Forged blanks of inner rings, outer rings and steel balls fully release residual forging stress and sequentially undergo precision turning, heat treatment, rough grinding and mirror superfinishing of raceways. Steel balls are grouped and assembled by high precision grades to ensure uniform load distribution. Seals and cages pass strict inspection before assembly to guarantee assembly precision. All finished goods are subject to visual inspection, radial clearance classification, vibration & noise detection and long-time high-speed durability test. Sealed bearings dedicated for water pumps and outdoor equipment undertake additional water immersion tightness simulation tests. Non-conforming products are separated independently. Every deep groove ball bearing achieves smooth rotation, controllable noise and reliable sealing, effectively lowering failure and shutdown risks of general electromechanical equipment.

Product Range

Open deep groove ball bearings, ZZ double-sided metal shield bearings, 2RS double-sided rubber sealed bearings; stamped steel cages and nylon cages optional; full specifications of standard clearance and C3 large clearance. Model selection depends on load type, rotating speed, environmental dust & humidity and mute requirements.

Brand Strength

NMT devotes to R&D and manufacturing of deep groove ball bearings. Targeting operating characteristics of long continuous operation, combined radial and axial loads, variable high & low temperature conditions on fans, water pumps and general motors, NMT continuously optimizes raceway curve design, superfinishing technology and sealing structure. The bearings solve industry pain points including high-speed abnormal noise, seal leakage and premature rust failure, help electromechanical manufacturers improve overall equipment performance and cut later maintenance costs.