Industrial motors, cooling fans, conveying equipment, packaging machinery, light industrial automation equipment, water pumps and small gearboxes widely adopt deep groove ball bearings as rotary supporting components. Most of such equipment runs continuously at constant speed for a long time, with certain startup and shutdown frequency in partial working conditions. Strict requirements are put forward for bearing operating noise, frictional resistance and high-speed stability. Bearings with ordinary manufacturing standards suffer insufficient raceway precision. Severe vibration and noise tend to occur during high-speed rotation, and fatigue pitting of rolling elements emerges after long-term operation, shortening equipment service life. Many operating environments contain a certain amount of moisture and dust impurities. Bearings without effective protection easily suffer internal rust and grease contamination, resulting in inflexible rotation. Meanwhile, various equipment specifications exist on the market. Customers demand standard bearings with complete specifications and strong interchangeability, suitable for new and old equipment renovation to reduce parts procurement and replacement costs. NMT Deep Groove Ball Bearings adopt classic double-arc deep groove structure, capable of bearing radial loads and slight bidirectional axial loads. Featuring smooth rotation and low friction coefficient, they adapt to medium and high-speed working conditions and are widely used in all kinds of general electromechanical equipment.

With continuous development of light automation industry, motors, fans and pipeline equipment are upgraded toward miniaturization and higher rotating speed. Higher standards are required for dynamic stability and mute performance of bearings. Ordinary bearings have rough raceway surfaces. Friction and temperature rise are obvious during high-speed operation, leading to rapid aging and failure of lubricating grease and easily triggering bearing overheating. Many workshop environments contain mist, dust and splashing cutting fluid. Open bearings cannot resist pollutant invasion, and rolling contact surfaces are prone to rust and abrasion. Mass assembly line equipment requires heavy maintenance workload. Bearings with insufficient durability need frequent shutdown for part replacement, directly cutting production capacity. Equipment manufacturers and maintenance enterprises are in urgent need of standardized deep groove ball bearings featuring high precision, low noise, optional sealing protection and complete specifications. Optimized with improved raceway profile design, NMT Deep Groove Ball Bearings ensure uniform stress on steel balls and effectively suppress high-speed vibration. Equipped with multiple dust-proof sealing structures to isolate dust and moisture erosion, they perfectly adapt to long-term continuous operation of motors, fans and various general rotary machinery.

Designed with standard deep arc raceways, NMT Deep Groove Ball Bearings withstand radial loads and moderate bidirectional axial loads with wide load adaptation range. Precisely sorted and super-finished rolling steel balls feature strictly controlled size deviation to achieve balanced stress during operation and reduce vibration and operating noise. Multiple structural types are available: open type, metal dust shield and rubber contact seal. Open bearings facilitate on-site grease replenishment and fit high-temperature ventilated environments. Metal dust covers suit dry working conditions with limited dust. Rubber sealing rings deliver stronger sealing performance to block moisture and fine dust from entering bearing inner cavities, adapting to humid and slightly polluted production environments. Cages are manufactured by stamping high-quality steel plates or high-molecular nylon materials. Steel cages possess high strength and wider temperature resistance range, while nylon cages generate lower operating noise and exhibit excellent self-lubricating property. The full size range covers miniature, small and medium series, extensively applied in industrial drive motors, cooling fans, circulating water pumps, textile machinery, food packaging equipment, conveyor rollers, small reducers and office automation devices.

Inner and outer rings are manufactured from high-carbon chromium bearing steel via standardized forging and integral heat treatment to balance surface hardness of raceways and internal toughness. Superfinishing grinding is carried out on raceway grooves to reduce surface roughness, lower rolling friction of steel balls and restrain excessive temperature rise. All finished products pass dimensional precision grouping, clearance screening and noise inspection. Units with abnormal noise and unqualified clearance are eliminated to guarantee consistent operation performance within each batch.

The complete specification series includes normal clearance and C3 enlarged clearance models, covering open type, ZZ metal shield type and 2RS rubber sealed type, supplying stable and reliable standard bearing solutions for general electromechanical rotary equipment.

Core Product Advantages

Classic deep groove ball structure bears radial loads and bidirectional axial loads with wide application and excellent versatility;

Super-finished raceways and precision steel balls deliver low friction, low vibration and outstanding noise performance at high speed;

Multiple sealing options: open type, metal dust shield and rubber sealing ring for different working environments;

Two cage alternatives: steel cages withstand high temperature with high strength; nylon cages achieve superior mute effect;

Full range of normal clearance and C3 clearance specifications to accommodate shaft thermal expansion caused by high-speed temperature rise and prevent bearing seizure;

Dimensions comply with international general standards with strong interchangeability. No structural modification required during replacement on new and old equipment;

Stable heat treatment technology provides good anti-fatigue performance, resisting early peeling damage after long continuous operation;

Diverse lubrication options. Long-effect grease is pre-filled before delivery for direct installation and simplified assembly.

Typical Application Scenarios

Industrial three-phase motors and single-phase drive motors; cooling fans, centrifugal fans and blowers; clean water pumps and small circulating water pumps; food & pharmaceutical packaging automation equipment; textile machinery and conveyor line rollers; small reducers and gearboxes; woodworking machinery and small processing equipment; office automation equipment and smart home transmission assemblies.

Quality Assurance

Raw materials of NMT Deep Groove Ball Bearings receive hardness and metallographic inspection after arrival to strictly control internal impurities of steel materials. Forged blanks of inner and outer rings eliminate forging stress and go through multiple processes including precision turning, heat treatment, rough grinding and superfinishing grinding with continuous control on raceway profile precision. High-precision grade steel balls are matched and assembled according to dimensional grouping. Burrs are removed after stamping and injection molding of cages to guarantee smooth movement of steel balls. Every finished bearing passes appearance inspection, radial clearance sorting and no-load noise testing. Motor-matching bearings receive additional high-speed temperature rise simulation tests. Defective products are sorted separately. Each deep groove ball bearing ensures flexible rotation, stable noise and qualified wear resistance, providing steady rotary support for various general electromechanical equipment.

Product Range

Open deep groove ball bearings, ZZ metal shield deep groove ball bearings, 2RS rubber sealed deep groove ball bearings; specifications with standard clearance and C3 clearance. Model selection based on rotating speed, humidity & dust level and temperature range.

Brand Strength

NMT focuses on R&D and manufacturing of general precision ball bearings. Targeting long-term continuous operation conditions of motors and fans, NMT continuously optimizes raceway machining precision, steel ball matching technology and sealing structure design. The bearings effectively improve common problems such as high-speed abnormal noise, premature rusting and excessive temperature rise. NMT helps equipment manufacturers enhance overall machine stability and reduce later maintenance frequency and maintenance costs.