Deep groove ball bearings are the most widely used basic rolling bearings in industry. Featuring arc-shaped deep raceway grooves, they can bear large radial loads and bidirectional light axial loads simultaneously. With compact structure, low friction coefficient, high limiting speed and easy maintenance, they are divided into open type, double-sided metal shield ZZ and double-sided rubber seal 2RS to adapt to clean workshop, dusty, humid and outdoor waterproof conditions. Covering full 60, 62, 63, 64, 16000 series, they are standard matching bearings for three-phase asynchronous motors, cooling fans, water pumps, gear reducers, air compressors, conveyor rollers, home appliances and small construction machinery.

Compared with roller bearings, deep groove ball bearings have lower rotating resistance, excellent high-speed mute performance and outstanding cost versatility. Different from angular contact ball bearings, they realize radial and axial composite load bearing with single installation without paired assembly for lower assembly difficulty. The disadvantage is insufficient bearing capacity under heavy load and strong impact, not applicable for heavy impact equipment such as mine crushers and large rolling mills, mainly for long-term high-speed operation of small and medium rotating equipment.

General industrial motors, cooling fans and circulating water pumps operate with frequent start-stop cycles under dusty, humid and weak acid mist environments. Conventional bearings suffer from seal aging, dust/water intrusion, grease drying, ball pitting and outer ring creep noise. Ordinary deep groove ball bearings have rough raceway machining, low-grade steel balls, poor anti-aging seals and uneven hardness after heat treatment, leading to loud noise, excessive temperature rise and seizure in short service life, resulting in motor stator sweeping, pump water leakage and fan unbalanced vibration, increasing daily maintenance expenses.

NMT deep groove ball bearings cover full 6000, 6200, 6300, 6400, 16000 series with open, ZZ metal shield and 2RS contact rubber seal options. Stamped steel cages are standard, with nylon cages optional for low-noise high-speed operation. Standard and C3 enlarged clearance, normal and P6 precision grades adopt international standard dimensions for direct replacement of all domestic and imported deep groove ball bearings for industrial equipment, agricultural machinery, home appliances and air compressors.

With energy-saving upgrading of general electromechanical equipment, fans, water pumps and motors develop toward higher rotating speed and longer maintenance-free cycle. Low-cost ordinary bearings feature fast seal failure, loud high-speed noise and short fatigue life, unable to adapt to long-term continuous operation in outdoor humid and dusty workshops. The market demands high-sealing, low-noise and long-life high-quality general deep groove ball bearings.

NMT applies superfinishing on arc raceway grooves for smooth curved surface, perfect fitting between steel balls and raceways to reduce rotating resistance, high-speed noise and temperature rise significantly. G5 high-precision steel balls with strict dimensional grouping eliminate vibration and noise caused by inconsistent ball size. 2RS seals adopt oil-water resistant nitrile rubber with lip compression design to block dust and moisture intrusion and slow grease deterioration. High-carbon chromium bearing steel with overall quenching delivers stable uniform hardness, anti-pitting wear on surface and sufficient matrix toughness to resist impact from frequent start-stop.

Scenario-oriented structural optimization: 2RS double rubber seal for outdoor water pumps and open-air fans for superior waterproof and dustproof performance; open or ZZ shield for indoor high-speed motors for outstanding heat dissipation; C3 large clearance for high-power variable frequency motors to offset thermal expansion at high speed and avoid bearing seizure. Compact structure enables easy disassembly without special tooling to shorten equipment downtime.

All finished bearings pass dynamic noise inspection, radial runout detection, seal rain test and high-speed durability aging test to eliminate defective products with excessive noise, poor sealing and dimensional deviation. Delivered bearings rotate smoothly without abnormal sound, reliable sealing and stable clearance after long-term operation.

Core Product Advantages

Classic deep arc raceway realizes composite radial and bidirectional axial load bearing for most small and medium rotating equipment.

G5 precision steel balls and raceway superfinishing ensure smooth mute high-speed rotation and low heat generation for long-term motor operation.

Multiple sealing options: metal shield for dustproof, rubber seal for waterproof and dustproof to adapt to workshops, outdoors, humid and dusty complex environments.

Durable stamped steel cages, noise-reducing nylon cages for different rotating speed requirements.

Optional C3 clearance adapts to thermal expansion of variable frequency motors to prevent high-temperature shaft seizure.

Overall quenched bearing steel features balanced hardness and anti-pitting performance to avoid fatigue peeling under frequent start-stop.

National standard inner/outer diameter and thickness for strong universal interchangeability and zero adaptation cost for bearing replacement.

Dual inspection of sealing performance and running noise extends maintenance-free cycle and reduces equipment overhaul frequency.

Typical Application Scenarios

Industrial three-phase asynchronous motors, variable frequency motors and fan motors; cooling tower fans, centrifugal fans and axial flow fans; clean water centrifugal pumps, circulating water pumps and booster pumps; small gear reducers and worm gear reducers; screw air compressor heads, conveyor rollers and assembly line rollers; agricultural machinery, power tools, compressors and household appliance motor components.

Quality Assurance

NMT implements full-process quality control for deep groove ball bearings: raw bearing steel is inspected for hardness, metallographic structure and purity; forgings undergo stress relief annealing to eliminate deformation after forging; inner and outer ring raceways adopt twice rough grinding plus mirror superfinishing; steel balls are sorted and matched by precision grade; seals receive anti-aging and hydrolysis pretreatment; finished products go through vibration noise grading, seal water immersion test and high-speed life simulation test one by one. Delivered bearings feature smooth rotation, reliable sealing, anti-aging and wear resistance to guarantee stable continuous operation of general electromechanical equipment.

Product Range

6000, 6200, 6300, 6400, 16000 series deep groove ball bearings; open type, ZZ metal dust shield, 2RS rubber seal; stamped steel cages, nylon cages; standard clearance, C3 clearance; normal precision, P6 precision grade.

Brand Strength

NMT focuses on R&D and manufacturing of general precision bearings. Targeting common defects of ordinary bearings including abnormal noise, water ingress failure, high-speed overheating and premature wear, NMT optimizes raceway superfinishing, high-precision steel ball configuration, sealing structure and steel heat treatment to greatly improve mute performance, sealing property and fatigue service life. It helps factories and electromechanical maintenance merchants reduce bearing procurement cost and economic loss caused by equipment shutdown maintenance.