Deep groove ball bearings represent the most widely adopted rolling bearing type. The inner and outer rings feature continuous arc-shaped deep groove raceways with steel balls as rolling elements. Characterized by simple and mature structural design and compact installation space, they can bear radial loads as well as bidirectional axial loads simultaneously. They adapt to high-speed operation with low rotation friction and noise. Deep groove ball bearings have no self-aligning capacity and require satisfactory coaxiality between rotating shaft and bearing housing. Thanks to outstanding comprehensive performance, they are extensively matched on drive motors, water pumps, fans, reducers, household appliances, auxiliary components of construction machinery, small conveying devices and thousands of types of general mechanical equipment. During continuous equipment operation, rotating shafts generate radial force and axial thrust simultaneously. Simple transmission structures can hardly be equipped with independent thrust components. Deep groove ball bearings undertake both types of loads and simplify overall structural design. Compared with self-aligning ball bearings, deep groove ball bearings deliver stronger axial load capacity and higher limiting speed. Different from angular contact ball bearings, they do not require paired installation, featuring simple assembly, superior versatility and cost performance. General equipment such as motors and water pumps operate under complicated conditions. Some working sites suffer dust and moisture invasion. Ordinary deep groove ball bearings on the market usually have defects including insufficient raceway machining precision, loose steel ball screening standards and poor fitting degree of sealing structures. Long-term high-speed operation easily leads to grease loss, aggravated raceway abrasion and frequent abnormal operating noise. NMT Deep Groove Ball Bearings own complete product range including open type, 2RS rubber seal and 2Z metal seal versions. Standard clearance and C3 clearance specifications are available with stamped steel cages. Sizes cover miniature bearings and medium-large standard specifications, fully satisfying mass supporting demands of electromechanical, fluid equipment and light machinery industries.

With continuous development of general electromechanical equipment industry, various drive motors, circulating water pumps and cooling fans run nonstop all year round. Market requirements on bearing operation stability, service life and noise control keep rising. Many medium and small electromechanical equipment have limited installation space which cannot accommodate complicated supporting structures. Bearings are required to bear radial and axial loads simultaneously. Some equipment works outdoors or inside workshops where dust and moisture easily penetrate bearing cavities and damage lubrication systems. Heat accumulates inside bearings under high-speed operation. Rough raceway surfaces easily trigger local high temperature and rapid deterioration of lubricating grease. Plenty of ordinary deep groove ball bearings suffer insufficient raceway surface finish and wide dimensional dispersion of steel balls. Uneven force emerges during high-speed rotation and operating noise keeps increasing. Improperly designed sealing lips lead to limited dustproof and waterproof capacity, causing premature bearing failure under harsh conditions. Machinery manufacturers are in urgent demand of premium deep groove ball bearings with strong versatility, quiet rotation, reliable sealing and excellent high-speed stability. Optimized with revised arc curvature of deep grooves to improve steel ball contact status and reduce contact stress under high-speed operation, NMT Deep Groove Ball Bearings adopt strict high-precision steel ball grading and screening procedures to guarantee even load distribution on rolling elements. Upgraded superfinishing of inner and outer rings improves raceway surface quality and effectively reduces friction heat and operating noise, providing stable and reliable standard supporting solutions for all kinds of medium and small general electromechanical equipment.

NMT Deep Groove Ball Bearings consist of inner ring, outer ring, steel balls and stamped steel cages. Continuous arc deep groove raceways steadily restrict movement tracks of steel balls and withstand radial loads as well as bidirectional axial loads. Multiple structural versions are available. Open bearings facilitate regular grease replenishment and suit maintainable transmission mechanisms; 2RS double-sided rubber sealed bearings deliver excellent dustproof, moisture-proof and anti-grease-leakage performance, widely applied in closed scenarios such as water pumps and motors; 2Z double-sided metal dust seals adapt to dry and dust-free indoor ventilation equipment. Precisely sorted steel balls cooperate with accurately machined raceways to ensure stable rotation and lower vibration amplitude under high-speed working conditions. All steel balls complete precision grouping before assembly to strictly control dimensional errors and avoid unbalanced force during high-speed operation. The products are extensively matched on industrial drive motors, water pumps, oil pumps, cooling fans, small gear reducers, air compressor accessories, household appliance transmission assemblies, light-duty conveyor rollers and other equipment.

Inner rings, outer rings and steel balls are manufactured from high-purity bearing chromium alloy steel. Multiple forging processes refine 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 spalling induced by long-term high-speed alternating loads. Multiple superfinishing procedures are carried out on inner and outer raceways to reduce surface roughness and effectively suppress frictional temperature rise and noise under high-speed rotation. All finished bearings pass dimensional inspection, steel ball grouping screening, radial clearance verification, long-time high-speed silent durability test and temperature rise monitoring test. Unqualified workpieces are eliminated to ensure consistent performance of mass products.

Standard clearance and C3 increased clearance specifications are optional with standard industry outer dimensions and excellent interchangeability for convenient maintenance and replacement of spare parts on various general electromechanical equipment.

Core Product Advantages

Classic deep arc raceway structure bears radial loads and bidirectional axial loads simultaneously, adapting to transmission conditions with combined forces;

Compact and simple structure achieves high limiting speed, low rotation friction, vibration and noise, suitable for various medium-high speed continuous operation equipment;

Open type, rubber seal and metal seal optional, fitting regular grease filling, dust & moisture prevention and dry clean environments respectively;

High-precision grouping and screening of steel balls strictly control dimensional deviation and realize uniform load distribution to prevent local stress concentration under high-speed conditions;

Standard clearance and C3 clearance available, adapting to normal temperature standard conditions and electromechanical equipment with thermal elongation of shafts during high-speed operation;

Superfinishing technology applied on inner and outer raceways delivers high surface finish, outstanding wear and fatigue resistance and avoids abnormal noise after long-term high-speed operation;

Premium bearing chromium alloy steel combined with stable heat treatment ensures excellent dimensional stability and high temperature resistance to extend bearing service life;

Standardized universal outer dimensions with great versatility for easy procurement, replacement and assembly of spare parts for motors, water pumps and fans.

Typical Application Scenarios

Various industrial drive motors and auxiliary servo motors; water pumps, oil pumps, circulating pumps and small hydraulic pumps; cooling fans and centrifugal ventilation equipment; small gear reducers and air compressor components; household appliance transmission mechanisms; light-duty belt conveyor rollers; small woodworking and food processing light machinery; auxiliary transmission parts of general construction machinery.

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 superfinishing of raceways. All steel balls are graded and grouped according to dimensional precision to guarantee balanced load distribution on rolling elements during high-speed rotation. Wear resistance, anti-aging and deformation stability tests are conducted on formed sealing parts and cages. All finished goods pass visual inspection, radial clearance screening, precision detection and long-time high-speed silent durability & temperature rise test. Sealed bearings dedicated for water pumps and outdoor equipment receive additional simulation durability tests under moisture and dust conditions. Non-conforming products are separated independently. Every deep groove ball bearing features smooth rotation, controllable noise and durable sealing, effectively lowering risks of unplanned shutdown failures of general electromechanical equipment.

Product Range

Open deep groove ball bearings; 2RS double-sided rubber sealed deep groove ball bearings; 2Z double-sided metal sealed deep groove ball bearings; standard clearance and C3 clearance specifications; stamped steel cages; covering miniature and medium-small standard sizes. Model selection depends on load type, rotating speed, on-site humidity & dust and maintenance mode.

Brand Strength

NMT focuses on R&D and manufacturing of deep groove ball bearings. Targeting operating characteristics including high-speed rotation, combined loads and variable working environments for motors, water pumps and fans, NMT continuously optimizes arc design of raceways, superfinishing technology and sealing structure schemes. The bearings solve industry pain points such as excessive high-speed noise, seal leakage and over temperature after long-term operation, help general electromechanical equipment manufacturers improve overall operation stability and extend maintenance & replacement intervals of bearings.