-- SKF Authorized Engineering Partner
Experience smoother, more reliable machinery performance with our High Precision Cylindrical Roller Bearing, designed to minimize vibration and extend equipment lifespan. The NSK Koyo N203em NJ203em models deliver consistent precision, ensuring your operations run with minimal downtime and maximum efficiency.
15+ Certified Engineers On-Call
Free application analysis · Failure diagnosis · Custom modification guidance. Response within 24 hours.
Spécifications du produit
Paramètre
Détails
Numéro de modèle
Rich Stocks
Graisse ou Huile
, OEM, ODM
Disponible
Emballage de transport
Carton, Palette
Origine
Chine
Code SH
8482102000
Adéquation de l'application
Industrie
Applications typiques
Équipement d'automatisation
Machines industrielles
Automobile
Moyeux de roue, composants de transmission
Many buyers struggle with finding the right cylindrical roller bearings—whether it’s matching obscure model numbers across brands, dealing with long lead times, or discovering premature failures from substandard components. When your equipment relies on precise motion control, choosing the wrong bearing can lead to costly downtime and repairs. Our NSK Koyo N203em NJ203em high precision cylindrical roller bearings address these challenges directly. With interchangeable dimensions following international standards, they fit seamlessly into existing equipment designs. Backed by ISO 9001 certified production processes, each bearing undergoes strict dimensional and hardness testing to ensure reliability. Whether used in automated manufacturing lines or industrial gearboxes, these bearings deliver the precision and durability required for continuous operation. This cylindrical roller bearing excels in applications with radial loads and moderate axial loads, operating efficiently at speeds up to 15,000 RPM depending on lubrication and cooling conditions. Its design features a separable inner or outer ring, simplifying installation and maintenance in tight spaces. The Z1V1 to Z3V3 vibration classes allow selection based on noise sensitivity—critical for precision instruments and quiet operation requirements. Caractéristiques techniques clés qui impactent la fiabilité
The 17x35x8mm dimension ensures compatibility with common shaft and housing configurations, while the high-grade grease technology provides effective lubrication under varying temperatures. Cylindrical roller bearings distribute load evenly across the rolling elements, reducing stress concentration compared to ball bearings—making them ideal for applications with heavy radial loads. The precision class maintains tight tolerances, minimizing runout and ensuring smooth rotation, which is essential for maintaining product quality in machining operations. Choosing a high precision cylindrical roller bearing may seem like a higher initial investment, but it pays off through extended service life and reduced maintenance. Inferior bearings often fail prematurely due to inconsistent material hardness or poor dimensional accuracy, leading to unplanned downtime and replacement costs. Our bearings’严格的质量控制 ensures predictable performance, allowing for accurate maintenance scheduling and lowering overall operational expenses. When calculating total cost, consider not just the purchase price but also the savings from fewer replacements and less production disruption. Qualité sur laquelle vous pouvez compter
All bearings are produced under ISO 9001 quality management systems, with raw material inspection and finished product testing for dimensions, hardness, and surface treatment. We offer a warranty against manufacturing defects, ensuring you receive bearings that meet specified performance standards. With rich stock availability, we can fulfill orders quickly, reducing lead times for your production needs. Our ability to source from multiple trusted brands, including NSK and Koyo, ensures you get the right bearing for your application—whether you need an exact replacement or a compatible alternative. Whether you need the N203em, NJ203em, or any other cylindrical roller bearing model, we can provide pricing and availability quickly. Simply share the bearing model, dimensions, required quantity, and destination, and our team will respond within 0.5 hours. With our extensive inventory and multi-brand sourcing capability, we make it easy to get the bearings you need when you need them. Foire aux questions
Q: Do you supply bearings from other brands besides NSK and Koyo? A: Yes, we source bearings from a wide range of international and domestic brands, including NTN, NMB, NACHI, Timken, and BDL, as well as custom OEM options. Q : Comment puis-je confirmer si ce roulement convient à mon équipement ?
A: Provide your equipment model or existing bearing dimensions (inner diameter, outer diameter, width), and our technical team will verify compatibility with the N203em/NJ203em specifications. Q : Quelle est votre politique de garantie pour ces roulements ?
A: We offer a warranty against manufacturing defects. The specific warranty period is determined by the application and will be detailed in your order confirmation. Q: Quelle est la quantité minimale de commande pour ce roulement ?
A: We support low minimum order quantities, including single-unit purchases for maintenance needs, with volume discounts available for larger orders. Q: How long does shipping take to [my location]? A: Shipping time depends on the method selected. Express delivery typically takes 3-5 days, air freight 5-7 days, and sea freight 20-30 days to most major destinations. Q: Can you produce custom bearings according to my specifications? A: Yes, we offer OEM and ODM services for custom bearing designs. Provide your technical drawings or performance requirements, and we can develop a solution tailored to your needs. Ready to order or need a quote?
16003-2Z, 4203ATN9, 430ATN9
Bore Diameter (d)
17mm
Outside Diameter (D)
35mm
Width (B)
8mm
Stock Availability
Lubrication Type
Vibration Class
Service Options
Delivery Methods
Express, Road, Train, Air, Sea
Sample Availability
On-Time Delivery Rate
100.0%
Response Time
Less Than 0.5h
Trademarks Available
BDL, NTN, NSK, NMB, Koyo, NACHI, Timken
Conveyor systems, precision machinery
Hydraulic pumps, electric motors
Need High Precision Cylindrical Roller Bearings? Avoid Common Sourcing Pitfalls
Engineered for Consistent Performance in Demanding Applications
Optimal Performance in Moderate Load, High-Speed Environments
Why Precision Bearings Reduce Total Cost of Ownership
Packaging & Shipping
Get Your Cylindrical Roller Bearing Quote Today
Send the bearing model, dimensions (d x D x B), and quantity — we’ll get back to you with pricing and lead time.
Contact us via email or phone for immediate assistance.
Main shaft, gearbox, and generator bearings for onshore and offshore wind turbines. Engineered for 20+ year service life.
Crushers, conveyors, and processing equipment bearings designed to withstand shock loads and contaminated environments.
Rolling mill and continuous casting bearings rated for extreme temperatures, heavy loads, and aggressive lubricants.
Hub units, transmission, and electric motor bearings meeting TS 16949 requirements for passenger and commercial vehicles.
Machine tool spindle and robotics bearings with P4/P2 accuracy class for ultra-precise positioning and minimal vibration.
Pumps, fans, compressors, and conveyor systems across all manufacturing sectors requiring reliable, cost-effective bearing solutions.
Official partner since 1998 with direct access to SKF technical resources, genuine products, and engineering expertise.
In-house team provides application design, failure analysis, and predictive maintenance -- reducing bearing failures by 35%.
Every product undergoes rigorous pre-shipment inspection with full documentation for traceability and compliance.
Dedicated account managers and reliable delivery networks ensure on-time supply for enterprise clients worldwide.
Performance Metrics
35%
Failures Prevented
70%
Downtime Reduction
25+
Years Experience
24h
Quote Response
78% of large enterprises prefer suppliers offering integrated technical support and lifecycle services.
Custom bearing selection and system design based on your specific load conditions, speeds, temperatures, and environmental factors.
Root-cause investigation of bearing failures using metallurgical testing, vibration analysis, and operating data review.
IIoT-enabled monitoring with smart sensor bearings for real-time vibration, temperature, and RPM tracking.
Modified bearings with special coatings, seals, tolerances, or materials. Lead time 8-12 weeks from official channels.
Certified engineers available for on-site installation support, alignment checks, and commissioning assistance worldwide.
Long-term service agreements including regular maintenance checks, replacement scheduling, and performance reporting.
Free samples available for orders over $50K
Validated against your KPIs before full production commitment.
-- Get In Touch
Our certified engineers will review your application requirements and provide a detailed quote within 24 hours.
Address
No. 377 Bansongyuan Road, Huangpu District, Shanghai, China
Free Sample Program
Orders over $50K qualify for free product samples
Test against your KPIs before full production commitment. Ask our engineers for details.
Regarding: NSK Koyo N203em NJ203em High Precision Cylindrical Roller Bearing
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