Original high-precision factory-direct components stocked for instant dispatch
In-depth technical parameterization, load calculations, and vacuum-degassed steel metallurgy for high-load industrial applications
The NSK 6202Z deep groove ball bearing represents the gold standard in metric single-row rolling bearing technology. Engineered with a nominal bore diameter of 15mm, an outer diameter of 35mm, and a precision width of 11mm, this component is ubiquitous across modern industrial machinery, robotics, electric motors, and high-precision CNC equipment. The "Z" suffix designates a single pressed steel dust shield permanently affixed to one side, retaining grease lubricants while providing excellent protection against coarse particulate ingress without introducing rotational friction drag.
| Dimensional & Mechanical Parameter | NSK ISO Engineering Standard Value | Operational Significance & Tolerance Control |
|---|---|---|
| Bore Diameter (d) | 15.000 mm (+0 / -0.008 mm) | ISO P0 / P6 precision class ensuring perfect press-fit shaft alignment. |
| Outer Diameter (D) | 35.000 mm (+0 / -0.009 mm) | Eliminates housing distortion and parasitic radial vibration modes. |
| Width (B) | 11.000 mm (+0 / -0.120 mm) | Standardized axial dimension for seamless drop-in equipment maintenance. |
| Ball Radius / Raceway Curvature | 0.515–0.525 f_r ratio | Optimized osculation ratio balancing contact stress and friction torque. |
| Radial Internal Clearance (RIC) | CN (Normal) / C3 (Expanded) | C3 (11–25 µm) recommended for thermal expansion in electric motors. |
| Steel Metallurgy Grade | Vacuum-Degassed SUJ2 / 100Cr6 | Ultra-clean steel structure reducing sub-surface fatigue spalling risk. |
Non-metallic inclusions (oxides, silicates, and nitrides) inside bearing steel act as stress concentration points under cyclic contact pressure exceeding 2,000 MPa. NSK’s proprietary vacuum-degassing process reduces oxygen content below 5 ppm, dramatically increasing dynamic load resilience and extending L10h fatigue life by up to 240% compared to standard commercial steel grades.
Next-generation tribological innovations, hybrid ceramic configurations, and smart sensor integration
Future iterations of NSK 6202Z incorporate synthetic ester greases formulation EA7 and LHT, reducing starting friction torque by 18% at low ambient temperatures while expanding operating temperature thresholds from -40°C up to +160°C for continuous high-speed performance.
For high-frequency inverter-driven motors, electrical stray currents induce micro-fluting flaking. The technical roadmap introduces ceramic Si3N4 rolling elements within the 6202 dimensions, establishing total galvanic isolation while increasing limiting speeds beyond 32,000 RPM.
Integration of ultra-low noise vibration testing (Z4V4 grade compliance) allows seamless synergy with Industry 4.0 predictive maintenance systems. Real-time FFT vibration spectrum monitoring detects early-stage raceway micro-spalling long before catastrophic machinery downtime.
Tailored engineering configurations designed to solve environmental and operational challenges across key industrial sectors
In electric vehicle starter-generators, electronic power steering (EPS), and coolant circulation pumps, the NSK 6202Z bearing operates under dynamic radial loads and severe rapid acceleration. Using low-drag polyurea greases, our wholesale solutions eliminate grease purging while extending service life to over 300,000 kilometers.
For CNC servo axis support and high-speed secondary spindles, minimum run-out tolerance is non-negotiable. Standardizing on NSK 6202Z P6 precision class bearings ensures less than 2.5 µm radial runout, preventing chatter marks on machined metal workpieces and preserving cutter longevity.
Collaborative robots (cobots) require compact joint modules with high stiffness and minimal rotational cogging torque. The 6202Z bearing delivers high dynamic rigidity within a tight 35mm envelope, enabling smooth continuous positioning accuracy in automated assembly lines.
Leveraging Ningbo’s world-class manufacturing ecosystem for unbeatable delivery speed, quality control, and volumetric scalability
Every batch of NSK 6202Z bearings dispatched from our Ningbo fulfillment center undergoes 100% laser optical dimension screening, automatic raceway waviness spectrum testing, and vibration testing. We mandate strict zero-defect quality thresholds prior to export packing.
To insulate international OEMs from geopolitical supply disruptions, our warehouse maintains a buffer stock of over 500,000 units of NSK deep groove ball bearings. We offer Vendor-Managed Inventory (VMI) frameworks and 48-hour emergency dispatch via express air freight.
By streamlining direct factory authorization channels and removing redundant intermediary distributions, our wholesale supply programs achieve a 15% to 25% procurement cost reduction without sacrificing genuine factory warranty coverage or certified material traceability.
Global regulatory compliance, anti-counterfeit protection, and engineering advisory services
Procuring industrial components on a global scale demands strict adherence to international legal, environmental, and engineering benchmarks. Every wholesale shipment of NSK 6202Z bearings supplied by DingYan Machinery is fully certified under ISO 9001:2015, ISO 14001 environmental management standards, and IATF 16949 automotive quality criteria.
Our bearing products, synthetic grease formulations, and anti-rust VCI protective wrappings comply 100% with EU RoHS 3 Directive (2015/863/EU) and REACH (EC 1907/2006) regulations, containing zero hazardous substances or heavy metals above permissible limits.
Counterfeit bearings account for massive industrial unplanned downtime. We implement 2D matrix barcode verification on all primary NSK factory cartons, allowing purchasing departments to instantly verify authentic origin via official NSK verification apps.
Our senior tribology engineers assist overseas buyers with comprehensive Failure Mode and Effects Analysis (FMEA), housing tolerance fit calculations (H7/k5, J7/m5), lubricant longevity estimation, and custom sealing recommendations for extreme dust environments.
Expert answers addressing intent-focused questions from procurement managers and maintenance engineers
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