Deep groove ball bearings are composed of inner ring, outer ring, steel balls and cages. Continuous curved deep groove raceways are arranged on inner and outer rings, enabling simultaneous bearing of radial loads and bidirectional axial loads to adapt to composite force conditions. Featuring point contact rolling structure, the bearings deliver low friction resistance, high limiting speed and smooth low-noise operation, making them the most widely used standard rolling bearing type. Benefiting from simple structure, convenient installation and outstanding versatility, they are massively matched with various electric motors, water pumps, oil pumps, light conveyors, fans, household appliances, auxiliary machine tools, food machinery and other general electromechanical equipment. Compared with self-aligning ball bearings, deep groove ball bearings possess balanced load capacity and stronger structural rigidity without self-aligning function, suitable for equipment with good assembly concentricity and slight shaft deflection. Different from angular contact ball bearings, deep groove ball bearings do not require paired installation with lower procurement and assembly cost, ideal for regular working conditions with moderate axial loads. A large number of general motors, pumps and light conveying equipment in various industries need long-term continuous operation. Assembly precision varies among different devices, and continuous high-speed operation requires stable performance of bearings in mute effect, temperature rise control and dust protection. Conventional deep groove ball bearings on the market usually suffer defects including insufficient precision of steel balls, inadequate surface finish of raceways and unreasonable structural design of sealing lips. Continuous high-speed operation easily leads to persistent temperature rise, grease loss, increasing abnormal noise and other failures, shortening maintenance intervals of complete machines. NMT Deep Groove Ball Bearings own complete product lines with multiple structures including open type, single-sided rubber seal, double-sided rubber seal and metal dust cover. Stamped steel cages are equipped as standard together with various radial clearance grades. Sizes cover miniature, small and small-medium regular specifications, fully meeting mass supporting and maintenance replacement demands of general electromechanical equipment.

With popularization of automation in general manufacturing industry, motors, fluid pumps and conveying units tend to operate non-stop for a long time. Many electromechanical equipment owns compact installation space without room for complex supporting structures, requiring bearings to balance comprehensive load capacity and long-term stable operation performance. Dust and moisture exist in some production workshops, and bearing sealing performance directly determines service life. Plenty of ordinary deep groove ball bearings adopt loose steel ball sorting standards with poor dimensional consistency of steel balls and high vibration value at high speed. Machining defects on raceway surfaces easily induce stress concentration and early pitting under long-term cyclic loads. Equipment manufacturers are in urgent need of standardized deep groove ball bearings with balanced overall performance, stable temperature rise, reliable sealing and prominent cost performance. Optimized with revised deep groove curvature parameters to improve contact state between steel balls and raceways and reduce contact stress effectively, NMT Deep Groove Ball Bearings adopt strict high-precision steel ball grouping and screening procedures to guarantee unified dimension of rolling elements. Upgraded ultra-precision grinding of inner and outer raceways together with optimally designed sealing structures reduce leakage of lubricant and invasion of impurities, providing mature and stable standard supporting solutions for all kinds of general electromechanical equipment.

NMT Deep Groove Ball Bearings consist of inner ring, outer ring, rolling steel balls and stamped steel cages. Continuous deep groove raceway structure allows simultaneous bearing of radial loads and bidirectional axial loads with wide force adaptability. Multiple optional structural types are available: open bearings facilitate on-site grease replenishment; metal dust-proof structure suits clean environments with little dust; double-sided rubber sealing structure delivers excellent dust-proof and waterproof effect, adapting to production sites with complicated working conditions. Precisely processed steel balls cooperate with ultra-fine ground raceways to ensure stable high-speed operation and maintain vibration and noise at low levels. All steel balls complete precision grouping and screening before assembly to strictly control dimensional tolerance and guarantee even load distribution on every rolling element. The products are extensively matched with three-phase asynchronous motors, circulating water pumps, hydraulic oil pumps, light belt conveyors, cooling fans, small woodworking machinery, food packaging equipment, auxiliary reducer parts and other general electromechanical devices.

Inner rings, outer rings and rolling steel balls are manufactured from high-purity bearing chromium alloy steel. Repeated forging refines internal grain structure. Precise constant-temperature quenching and tempering guarantee qualified hardness on working surfaces of raceways and steel balls while the matrix retains appropriate toughness to resist fatigue damage caused by long-term cyclic loads. Multiple ultra-precision grinding processes are carried out on inner and outer deep groove raceways to optimize surface micro-morphology, facilitate formation of uniform and stable lubricating oil film and suppress frictional heat during high-speed operation. All finished bearings pass dimensional precision inspection, steel ball grouping verification, radial clearance detection, long-time high-speed temperature rise durability test and vibration & noise grade screening. Unqualified products are eliminated to ensure consistent and stable performance of mass products.

Various clearance grades and sealing structures are optional. The bearings adopt standard universal outer dimensions with excellent interchangeability for convenient maintenance and replacement of spare parts on general electromechanical equipment.

Core Product Advantages

Standard deep groove raceway structure bears radial loads and bidirectional axial loads simultaneously, adapting to various composite force working conditions;

Point contact rolling structure brings low friction resistance, high limiting speed and smooth low-noise operation, suitable for continuous high-speed operation;

Multiple types including open type, metal dust cover and double-sided rubber seal optional, adapting to clean, dusty and humid environments;

Optimized raceway curvature design improves contact stress distribution of steel balls and relieves local stress concentration and surface pitting under long-term loads;

High-precision graded steel balls feature narrow dimensional dispersion to realize even load sharing, effectively delay fatigue loss and extend bearing service life;

Ultra-precision grinding applied on raceways achieves excellent surface finish, facilitates stable oil film formation and efficiently controls temperature rise during long-time high-speed operation;

Premium bearing alloy steel combined with mature heat treatment delivers great wear and fatigue resistance to adapt to year-round continuous operation of electromechanical equipment;

Standardized universal outer dimensions with extremely strong versatility for easy procurement and replacement of spare parts on motors, water pumps and conveying machinery.

Typical Application Scenarios

All kinds of industrial drive motors and auxiliary servo motors; circulating water pumps, hydraulic oil pumps and small vacuum pumps; light belt conveyors and roller conveying equipment; industrial cooling fans and cooling blowers; transmission parts of woodworking machinery and small machine tools; food packaging and stirring processing machinery; supporting positions of reducers and small gearboxes; household & industrial ventilation equipment, fitness equipment and office automation equipment.

Quality Assurance

Raw materials of NMT Deep Groove Ball Bearings receive sampling inspection on hardness, metallographic structure and non-metallic inclusions upon warehousing to control raw material quality fundamentally. Forged blanks of inner rings and outer rings fully release residual forging stress and sequentially undergo precision turning, heat treatment, rough grinding and ultra-precision grinding of deep groove raceways. All steel balls are graded and grouped according to high precision standards to guarantee even load distribution under high-speed operation. Wear resistance and durability tests are conducted on formed cages and sealing components, and additional dust & moisture intrusion simulation tests are carried out for sealed models. All finished goods pass visual inspection, clearance screening, geometric precision detection and long-time high-speed vibration, noise & temperature rise durability test. Sealed bearings used in humid and dusty environments receive extra continuous protection performance tests. Non-conforming products are separated independently. Every deep groove ball bearing features smooth rotation, stable temperature rise and controllable noise, greatly lowering failure shutdown risks of general electromechanical equipment.

Product Range

Deep groove ball bearings of multiple clearance grades; open type, ZZ metal dust cover, 2RS double-sided rubber seal optional; abundant dimensional specifications covering miniature, small and small-medium bearing sizes. Model selection depends on load magnitude, rotating speed, environmental dust & humidity and axial load value.

Brand Strength

NMT focuses on R&D and manufacturing of standard deep groove ball bearings. Targeting industry characteristics including high-speed operation, diverse working conditions and huge demand for motors, pumps and light conveying equipment, NMT continuously optimizes raceway curve, steel ball precision standards and sealing structure design. The bearings solve common pain points such as abnormal noise at high speed, excessive temperature rise during continuous operation and abrasion caused by impurity invasion, help general equipment manufacturers improve overall machine operation stability, extend replacement intervals of components and optimize later operation and maintenance costs of equipment.