Cylindrical Roller Bearing
ISO 9001 Certified
TS 16949
Genuine SKF
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Cylindrical Roller Bearing
China N304em NJ304em NF304em NU304em NUP304em Cylindrical Roller Bearing
Experience smoother, longer-lasting machinery performance with our precision-engineered China N304em NJ304em NF304em NU304em NUP304em Cylindrical Roller Bearing. This cylindrical roller bearing minimizes friction during high-speed rotation, reducing wear on critical components and extending your equipment’s operational life—so you spend less time on maintenance and more on productivity.
- Optimized cage design ensures uniform load distribution, preventing premature failure even under heavy radial loads
- Precision-ground raceways deliver consistent performance across temperature variations, ideal for industrial applications
- Direct replacement for standard N304 series bearings, ensuring seamless integration with existing setups
7
Day Prototype
vs. 8-12 wks standard
50+
Countries Served
Global logistics network
12h
Quote Response
Expert engineers on call
Typical Applications
Wind Power
Mining
Steel & Metallurgy
Automotive / EV
Rail Transit
Precision Machinery
Genuine SKF Bearings
NDA Protected
Free Sample for Orders > $50K
Global Shipping
Product Details
Product Specifications
| Parameter | Details |
|---|
Application Suitability
| Industry | Typical Applications |
|---|---|
| Engineering Machinery | Hydraulic cylinder pivot points, conveyor systems |
| Wind Energy | Pitch control mechanisms, yaw drive components |
| Mining | Crusher bearings, conveyor rollers |
| Automation Equipment | Linear motion systems, precision rotary tables |
Struggling with Cylindrical Roller Bearing Selection? Here’s What You Need
Procuring the right cylindrical roller bearing often means sifting through countless models across metric and imperial standards, only to face delays from suppliers with limited brand coverage. When dimensions don’t match or material quality fails, equipment downtime and maintenance costs quickly add up—problems we’ve helped resolve for over a decade in industrial procurement.
Your Single Source for N304em Series Cylindrical Roller Bearings
This N304em series cylindrical roller bearing (including NJ304em, NF304em, NU304em, NUP304em variants) addresses common procurement pain points through our ISO 9001-certified supply chain. With interchangeable dimensions following international standards, we eliminate the hassle of cross-brand compatibility checks. Whether you need a single unit for emergency repair or bulk orders for production, our extensive inventory ensures quick fulfillment without minimum quantity constraints.
Optimized Performance in Heavy-Duty Applications
Designed for radial load handling in high-torque environments, this cylindrical roller bearing excels in industrial gearboxes, electric motor spindles, and machine tool turrets. Its robust construction tolerates moderate axial loads and operates reliably within typical industrial temperature ranges, making it suitable for continuous-duty applications in steel mills, mining equipment, and automated production lines where precision and durability are non-negotiable.
Key Engineering Features for Reliable Operation
The bearing’s cylindrical roller design distributes load evenly across the raceway, reducing contact stress and extending service life compared to ball bearings in similar applications. Precision-machined components ensure consistent dimensional accuracy, critical for interchangeability when replacing bearings from different manufacturers. Surface hardness testing confirms resistance to wear, while proper cage design maintains roller alignment even under dynamic loading conditions—engineering details that directly impact equipment uptime and maintenance intervals.
Total Cost of Ownership Matters More Than Initial Price
Choosing a low-quality cylindrical roller bearing may save on upfront costs, but premature failure often leads to unplanned downtime, replacement labor, and potential damage to adjacent components. Our bearings undergo rigorous dimensional and material testing to minimize these risks. By following ISO 281 load rating standards, we provide predictable performance that contributes to lower total cost of ownership over the equipment lifecycle—a value that becomes clear after months of uninterrupted operation.
Quality Assurance You Can Verify
Every bearing in our inventory meets ISO 9001 quality management standards, from raw material inspection to final dimensional testing. We verify critical parameters including bore diameter, outer diameter, width, and surface finish before shipment. A standard warranty covers manufacturing defects, with clear protocols for returns and replacements. Our procurement network includes both established international brands and reputable domestic manufacturers, allowing us to fulfill orders according to your specific brand or quality requirements.
Packaging & Shipping
- Neutral industrial packaging with moisture protection
- Same-day shipping for in-stock items
- Flexible logistics options: express courier, air freight, or sea transport
- Low minimum order quantity—ideal for both maintenance and production needs
Get Your Cylindrical Roller Bearing Quote Today
Whether you need the N304em, NJ304em, NF304em, NU304em, NUP304em, or any other cylindrical roller bearing model, provide your required specifications and quantity. Our team will confirm availability, pricing, and delivery options within hours, helping you keep your operations on schedule.
Frequently Asked Questions
Q: Can you supply bearings from specific brands?
A: Yes, we support procurement of all major international and domestic brands. Specify your preferred brand, and we’ll source accordingly.
Q: How do I confirm if this bearing fits my equipment?
A: Provide your equipment model or the bearing’s critical dimensions (bore diameter, outer diameter, width), and our technical team will verify compatibility.
Q: What is your warranty policy?
A: We offer a standard warranty against manufacturing defects. Specific terms are detailed in each sales contract.
Q: What is the minimum order quantity?
A: We accept small orders, including single units, to support maintenance needs and trial installations.
Q: How long does shipping take?
A: In-stock items ship the same day. Delivery time depends on your location and chosen logistics method.
Q: Do you offer custom bearing solutions?
A: Yes, we support OEM/ODM customization based on technical drawings or specific performance requirements.
Ready to order or need a quote?
Send the bearing model, dimensions (d x D x B), and quantity — we’ll get back to you with pricing and lead time.
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Product Summary
- Product Name
- China N304em NJ304em NF304em NU304em NUP304em Cylindrical Roller Bearing
- Category
- Cylindrical Roller Bearing
- Brand
- SKF
- Certification
- ISO 9001 · TS 16949
- Lead Time
- 7 Working Days
Get a Custom Quote
Our engineers will respond within 12 hours with a tailored solution.
Request QuoteGeneral Specifications
| Bearing Type | Cylindrical Roller Bearing |
| Brand | SKF |
| Quality Standard | ISO 9001 / TS 16949 |
| Precision Grade | P0 / P5 / P6 (custom) |
| Material | Chrome Steel / Stainless |
| Cage Material | Steel / Brass / Polyamide |
| Lubrication | Grease / Oil (specify) |
| Operating Temp. | -40°C to +200°C |
| Min. Order Qty | 1 pc (samples available) |
| Prototype Lead Time | 7 Working Days |
Performance Parameters
| Load Capacity | Contact for C0/Cr values |
| Speed Rating | Contact for ndm limit |
| Vibration Level | Z1 / Z2 / Z3 (custom) |
| Noise Level | V1 / V2 / V3 (custom) |
| Fatigue Life | L10h per ISO 281 |
| Sealing Options | Open / Z / 2Z / RS / 2RS |
Custom Specifications Available
Our engineering team can modify bearing dimensions, materials, seals, and clearances to meet your specific operating requirements. Submit your drawing or spec sheet for a tailored proposal.
Wind Power
Main shaft bearings, gearbox bearings, and generator bearings for onshore and offshore wind turbines.
Mining & Quarrying
Heavy-duty bearings for crushers, conveyors, and rotary equipment in extreme dust and shock-load environments.
Steel & Metallurgy
High-temperature bearings for rolling mills, continuous casting, and furnace applications.
Automotive / EV
Wheel hub bearings, transmission bearings, and e-motor bearings for passenger and commercial vehicles.
Rail Transit
Axle box bearings, traction motor bearings, and gearbox bearings meeting EN/UIC railway standards.
Precision Machinery
High-precision spindle bearings, angular contact bearings, and super-precision bearings for CNC and robotics.
Application Design
EngineeringOur engineers analyze your operating conditions -- load, speed, temperature, environment -- and select or design the optimal bearing solution to maximize service life and reduce total cost of ownership.
Custom Modification
7-Day TurnaroundNeed non-standard dimensions, special materials, or modified clearances? We can modify standard SKF bearings or manufacture fully custom solutions with a 7-day prototype turnaround.
Failure Analysis
DiagnosticsWhen bearings fail prematurely, our team conducts root-cause analysis using advanced diagnostic tools to identify the failure mode and recommend corrective action.
Predictive Maintenance
Up to 40% Less DowntimeWe deploy vibration monitoring, thermal imaging, and oil analysis programs that detect bearing deterioration early -- reducing unplanned downtime by up to 40%.
On-site Installation
Global CoverageProper installation is critical to bearing performance. Our certified technicians provide on-site installation support, alignment verification, and operator training worldwide.
Lifecycle Support
Enterprise SLAFrom initial selection through end-of-life, our dedicated account managers provide scheduled maintenance plans, re-lubrication programs, and replacement forecasting for enterprise clients.
Why SKF China
The engineering partner advantage
7 Days
Prototype Lead Time
vs. 8-12 weeks via standard channels
15+
Certified Engineers
SKF-certified, on-call for your project
50+
Countries Delivered
Reliable global logistics network
Request a Quote
Get a custom quote for
China N304em NJ304em NF304em NU304em NUP304em Cylindrical Roller Bearing
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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