Cylindrical Roller Bearing
ISO 9001 Certified
TS 16949
Genuine SKF
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Cylindrical Roller Bearing
High Precision Cylindrical Roller Bearing N309 Nu309 NF309 Nj309 Nup309
Ensure smooth, high-precision machinery operation with our High Precision Cylindrical Roller Bearing, designed to deliver reliable radial load support for critical applications. Crafted from durable Bearing Steel with a separated inner and outer ring structure, this single-row bearing minimizes friction and maximizes stability, even under demanding conditions.
- Precision ratings from P0 to P2 ensure optimal performance for everything from standard industrial use to high-precision equipment
- Open seal design allows flexible lubrication options (oil, grease, or dry) to adapt to your specific operating environment
- Compact 45*100*25 mm specification fits seamlessly into existing setups, reducing downtime during replacement
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 |
|---|---|
| Model Number | N309, Nu309, NF309, Nj309, Nup309 |
| Bearing Type | Cylindrical Roller Bearing |
| Outer Dimension | 35mm-180mm |
| Specification | 45*100*25 mm |
| Material | Bearing Steel |
| Load Direction | Radial Bearing |
| Structure | Cylindrical |
| Seals Type | Open |
| Lubricate | Oil Grease Dry |
| Precision Rating | P0, P6, P5, P4, P2 |
| Number of Row | Single Row |
| Spherical | Non-Aligning Bearings |
| Separated | Separated |
| Vibration | V1, V2, V3, V4 |
| Trademark | BDL |
| Origin | China |
| HS Code | 8482500090 |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Engineering Machinery | Transmission systems, gearboxes |
| Automation Equipment | Conveyor rollers, machine tool spindles |
| Steel Metallurgy | Rolling mill stands, continuous casting machines |
| Hydraulic Systems | Pump shafts, hydraulic motor supports |
Need Reliable Cylindrical Roller Bearings? Here’s What Solves Your N309 Series Challenges
Finding the right cylindrical roller bearing for your equipment can be frustrating—mismatched dimensions causing installation delays, inconsistent quality leading to premature failures, or limited supplier options forcing you to manage multiple orders. When your production line depends on components like the N309 series, these issues directly impact uptime and maintenance costs.
Engineered for Consistent Performance in Demanding Conditions
Our High Precision Cylindrical Roller Bearings (N309, Nu309, NF309, Nj309, Nup309) address these pain points with ISO 9001-certified manufacturing and a full range of international standard dimensions. Whether you need a direct replacement for existing machinery in steel mills or automated production lines, these bearings deliver reliable radial load handling with separated inner and outer rings for easy installation and maintenance.
Optimal Performance in Radial Load Applications
Designed specifically for radial load environments, these single-row cylindrical roller bearings excel in high-speed rotating equipment where precision matters. With an open seal design and compatibility with oil, grease, or dry lubrication, they adapt to diverse operating conditions—from clean factory settings to dusty industrial environments. The non-aligning structure ensures stability in applications with minimal shaft misalignment, making them ideal for gearboxes and conveyor systems.
Key Engineering Details That Impact Longevity
The bearing steel construction provides hardness and wear resistance critical for extended service life, while precision ratings from P0 to P2 allow selection based on application requirements—from general industrial use (P0) to high-precision machine tools (P2). The separated design simplifies maintenance, allowing quick disassembly for inspection or lubrication without removing adjacent components. Vibration grades V1 to V4 ensure smooth operation, reducing noise and minimizing stress on connected parts.
Why Choosing the Right Cylindrical Roller Bearing Lowers Total Costs
Selecting a substandard bearing may save initial costs but often leads to hidden expenses: unexpected downtime for replacements, increased energy consumption from friction, and potential damage to costly machinery. Our N309 series meets strict dimensional and material standards, reducing the risk of premature failure. By matching the correct precision class and lubrication type to your application, you optimize performance and extend maintenance intervals, lowering overall operational expenses.
Quality You Can Rely On, Backed by Rigorous Standards
Every bearing undergoes thorough inspection, from raw material testing to final dimensional and hardness checks, ensuring compliance with industry standards. We offer a warranty against manufacturing defects, providing peace of mind for your critical applications. With access to both our BDL brand and a wide range of international and domestic brands, we can source or supply the exact bearing you need—whether for standard replacements or custom OEM/ODM requirements.
Packaging & Shipping
- Packaged in cartons with pallet options for bulk orders
- Available from stock for quick delivery
- Flexible shipping via courier, air, or sea freight
- Low minimum order quantity supported for both small and large purchases
Get Your N309 Series Bearing Quote Today
Whether you need a single N309 bearing or bulk quantities of Nu309, NF309, Nj309, or Nup309 variants, provide your required model, dimensions, and quantity, and we’ll deliver competitive pricing and lead time. Our team can also assist with cross-referencing other brands to ensure compatibility with your equipment.
Frequently Asked Questions
Q: Can you supply other bearing brands or models besides BDL?
A: Yes, we support inquiries for all major international and domestic brands. We can source or supply bearings according to your specified brand, model, or technical requirements.
Q: How do I confirm if this bearing fits my equipment?
A: Provide your equipment model, existing bearing dimensions (d x D x B), or application details, and our technical team will verify compatibility with the N309 series or recommend alternatives if needed.
Q: What is your warranty policy for these bearings?
A: We provide a warranty against manufacturing defects. Specific terms are outlined in the sales contract, and defective products covered by warranty can be replaced or refunded.
Q: What is the minimum order quantity?
A: We accept low minimum order quantities, including small trial orders, to meet your immediate needs.
Q: How quickly can you ship after ordering?
A: Stock items are shipped within 1-3 business days. Shipping time depends on the selected method (courier, air, or sea freight) and destination.
Q: Do you offer OEM or ODM services?
A: Yes, we support custom bearing manufacturing (OEM/ODM) based on your drawings, specifications, or samples.
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
- High Precision Cylindrical Roller Bearing N309 Nu309 NF309 Nj309 Nup309
- 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
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High Precision Cylindrical Roller Bearing N309 Nu309 NF309 Nj309 Nup309
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