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Cylindrical Roller Bearing
China High Precision N308em NJ308em Cylindrical Roller Bearing
Experience smoother, more reliable machinery performance with our high-precision N308em Cylindrical Roller Bearing. Engineered to minimize friction and handle radial loads with exceptional stability, this bearing ensures your equipment runs longer between maintenance checks, reducing costly downtime.
- China-manufactured precision ensures consistent operation even under heavy load conditions
- EM design features optimized internal geometry for enhanced lubrication retention and heat dissipation
- Direct replacement for NJ308em specifications, simplifying upgrade or repair processes
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 |
|---|---|
| Bearing Type | Cylindrical Roller Bearing |
| Model Number | N308em, NJ308em |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Engineering Machinery | Hydraulic cylinder pivot points, gearbox shafts |
| Automotive | Transmission systems, differential assemblies |
| Industrial Equipment | Conveyor rollers, machine tool spindles |
| Steel Metallurgy | Rolling mill stands, continuous casting machines |
Tired of Cylindrical Roller Bearing Failures? The N308em/NJ308em Difference
Finding the right cylindrical roller bearing can feel like navigating a maze of incompatible dimensions and questionable quality. Many buyers face costly downtime when generic bearings fail prematurely or struggle to source specific models like N308em and NJ308em across multiple suppliers.
Precision Engineered for Demanding Load Conditions
Our N308em and NJ308em cylindrical roller bearings address these challenges with ISO 9001-certified manufacturing processes and interchangeable dimensions with major international standards. Designed to handle radial loads in high-torque applications—from hydraulic system shafts to industrial gearboxes—these bearings deliver consistent performance where generic alternatives fail.
Optimal Performance in Heavy-Duty Applications
This cylindrical roller bearing excels in environments with continuous radial loading and moderate speeds, typical in工程机械 transmissions and steel mill conveyor systems. Its robust design tolerates operating temperatures up to 120°C, making it suitable for both indoor industrial settings and outdoor machinery exposed to variable conditions.
Key Engineering Features for Reliability
The N308em/NJ308em series incorporates precision-ground raceways that minimize friction and maximize load distribution. Its cylindrical roller design allows for higher radial load capacity compared to deep groove ball bearings of similar size, while the NJ308em’s double-lip seal provides enhanced contamination resistance in dusty or moist environments. Surface hardness of HRC 58-62 ensures resistance to wear under cyclic loading, extending service life in continuous operation scenarios.
Why Precision Matters for Total Cost of Ownership
Choosing the correct cylindrical roller bearing directly impacts equipment uptime and maintenance costs. A bearing with improper precision class can cause shaft misalignment, leading to increased vibration, premature seal failure, and costly secondary damage to adjacent components. Our strict dimensional control—including bore diameter (d), outside diameter (D), and width (B) tolerances—ensures accurate fit, reducing installation time and eliminating the need for custom machining.
Quality You Can Rely On
Every N308em/NJ308em bearing undergoes comprehensive testing, including raw material verification and成品尺寸 inspection. Our ISO 9001-certified quality management system covers all production stages, from forging to final packaging. We provide a standard质保期 against manufacturing defects, with clear protocols for replacement or refund in the unlikely event of quality issues. As a full-range bearing supplier, we source from established manufacturers and can fulfill orders for both these specific models and alternative brands based on your requirements.
Packaging & Shipping
- Neutral industrial packaging with product specifications and batch coding
- Available from stock for immediate dispatch
- Multiple logistics options: Express courier for urgent orders, air freight for bulk shipments, or sea freight for cost-effective large quantities
- Low minimum order quantity supported, ideal for maintenance stock or small-scale production
Get Your N308em/NJ308em Quote Today
Whether you need the N308em, NJ308em, or alternative cylindrical roller bearing models, provide your required quantity and delivery location, and we’ll confirm current stock availability and pricing. Our team can also assist with cross-referencing if you need equivalents from other品牌体系.
Frequently Asked Questions
Q: Can you supply other brands or models of cylindrical roller bearings?
A: Yes, we support inquiries for all major international and domestic品牌, and can source specific models according to your required specifications.
Q: How do I confirm if the N308em/NJ308em will fit my equipment?
A: Provide your existing bearing’s dimensions (d x D x B) or equipment model number, and our technical team will verify compatibility with the N308em/NJ308em specifications.
Q: What is your warranty policy for these bearings?
A: We offer a standard质保期 against manufacturing defects. Specific terms are detailed in our sales contract, with replacement or refund options for verified quality issues.
Q: What is the minimum order quantity for N308em/NJ308em bearings?
A: We accept low minimum order quantities, including single-unit purchases for maintenance needs, with volume discounts available for larger orders.
Q: How quickly can you ship these bearings?
A: Stock items ship within 24 hours of order confirmation. We offer express courier, air, and sea freight options to match your delivery timeline requirements.
Q: Do you provide OEM/ODM customization for cylindrical roller bearings?
A: Yes, we support custom bearing production according to client-provided drawings or specifications, including material upgrades and special lubrication options.
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.
Contact us via email or phone for immediate assistance.
Product Summary
- Product Name
- China High Precision N308em NJ308em 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 High Precision N308em NJ308em Cylindrical Roller Bearing
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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