Mining & Metallurgy
Crushers, mills, conveyors, and smelting equipment under heavy radial/axial loads.
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100% Genuine SKF
Full Traceability
ISO 9001 Certified
SKF Authorized
Cylindrical Roller Bearing
Double Row Cylindrical Roller Bearing NNU4934 B/Sp C3 for Construction Machinery
Double Row Cylindrical Roller Bearing NNU4934 B/Sp C3 for Construction Machinery
In Stock · Ready to Ship
<p>Ensure uninterrupted performance in heavy-duty construction machinery with the <strong>Double Row Cylindrical Roller Bearing NNU4934 B/Sp C3</strong>, engineered to deliver exceptional radial load capacity and precise operation under extreme conditions. Its separated inner and outer rings simplify installation and maintenance, reducing downtime during critical equipment overhauls.</p><ul><li>C3 clearance design accommodates thermal expansion in high-torque applications, preventing premature wear and extending service intervals</li><li>Non-aligning structure maintains stability in misaligned shafts, ensuring consistent power transmission in rugged job site environments</li><li>Constructed with high-grade bearing steel (60-64 HRC hardness) for superior durability against shock loads and debris contamination</li></ul><p>Backed by full traceability documentation and dedicated technical support, this bearing ensures your machinery stays productive with reliable, certified components that meet global OEM standards.</p>
Bore (d)
--
Outer Dia. (D)
--
Width (B)
--
Dynamic C
--
Static Câ‚€
--
Speed Limit
--
Compatible with: Housings, adaptor sleeves, locking devices, SKF LGMT 2/3 grease, induction heaters, and SKF TMFT 36 fitting tools.
Formal quotation with SKF traceability cert within 24 hours · Sample orders available
24h Response
Quotation & Cert
60+ Countries
DDP/DAP/CIF
ISO 9001
Quality Certified
Full Specifications
Complete Technical Parameters
Double Row Cylindrical Roller Bearing NNU4934 B/Sp C3 for Construction Machinery -- Parameter Sheet
SKF · Cylindrical Roller Bearing
| Parameter | Value | Unit / Note |
|---|---|---|
| Bearing Series | -- | Cylindrical Roller Bearing |
| Bore Diameter (d) | -- | mm |
| Outer Diameter (D) | -- | mm |
| Width / Height (B) | -- | mm |
| Dynamic Load Rating (C) | -- | kN |
| Static Load Rating (Câ‚€) | -- | kN |
| Fatigue Limit Load (Pu) | -- | kN |
| Reference Speed | -- | r/min |
| Limiting Speed | -- | r/min |
| Mass | -- | kg |
| Clearance Class | C3 | ISO 281 |
| Cage Material | -- | -- |
| Sealing / Shield | -- | -- |
| Lubrication | Grease / Oil bath | -- |
| Operating Temp. Range | −30 to +120 °C | -- |
| Vibration Level | SKF E1 / Standard | -- |
| Misalignment Tolerance | -- | ° |
| Fit Recommendation (shaft) | -- | ISO |
| Fit Recommendation (housing) | -- | ISO |
| Replacement / Cross Ref. | -- | -- |
* All specifications are reference values. Contact our SKF engineers for application-specific confirmation.
Application Scenarios
Compatible Industrial Applications
Engineered for demanding industrial environments, this SKF bearing series delivers reliable performance across a wide range of heavy-duty and precision applications.
Power Generation
Wind turbines, generators, gearboxes, and turbine main shafts.
Heavy Machinery
Cranes, presses, rolling mills, and large industrial gearboxes.
Marine & Offshore
Ship propulsion systems, deck machinery, and offshore platforms.
Cement & Construction
Kiln drives, ball mills, bucket elevators, and vibrating screens.
Pulp & Paper
Paper machine rolls, dryer sections, and calender rolls.
Full Portfolio
One-Stop SKF Supporting Solutions
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Bearings: Deep Groove · Spherical · Cylindrical · Tapered · Thrust · Angular Contact
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Sealing: Radial shaft seals · V-rings · Labyrinth seals · Bearing isolators
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Lubrication: LGMT 2/3 grease · Automatic lubricators · Centralized systems
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Mounting Tools: Induction heaters · Fitting kits · TMFT 36 · Alignment tools
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Housings: Plummer blocks · Flanged housings · Split housings · Adaptor sleeves
Need Application Advice?
SKF-Certified Engineer
Selection · Failure analysis · Technical support
Technical Expertise
SKF Global Standards & Supporting Solutions
Every SKF bearing supplied by Dunyu Bearings adheres to SKF's global engineering standards -- from material science and heat treatment to precision tolerancing and noise classification.
Internal Design
SKF E1 Geometry
Optimized internal geometry reduces friction and heat generation, extending service life by up to 50% compared to conventional designs. Ideal for high-speed and high-temperature applications.
ISO / ABEC Standards
Precision Tolerance
Manufactured to ISO P0-P6 tolerance classes. Dimensional accuracy and running accuracy are 100% verified before shipment, with full batch traceability records.
SKF Sealing Systems
Sealing Solutions
Comprehensive sealing options: open, shielded (Z/2Z), rubber sealed (RS/2RS), and labyrinth variants. SKF V-rings and radial shaft seals available as integrated solutions.
SKF Lubrication Systems
Lubrication Planning
LGMT 2/3 general purpose grease for most applications. LGEP 2 for heavy loads, LGHP 2 for high temperatures. SKF automatic lubricators (SYSTEM 24) for continuous re-lubrication.
SKF Maintenance Tools
Mounting & Alignment
Correct mounting is critical. SKF TMFT 36 fitting tool kit, induction heaters (TIH 030M/100M), and laser alignment tools ensure damage-free installation and maximum service life.
Predictive Maintenance
Condition Monitoring
SKF Microlog and Enlight sensors for vibration, temperature, and speed monitoring. Enable predictive maintenance strategies to minimize unplanned downtime and optimize bearing replacement intervals.
Product Details
Product Specifications
| Parameter | Details |
|---|---|
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Outer Dimension Range | Medium and Large(120-190mm) |
| Material | Bearing Steel |
| Alignment Feature | Non-Aligning Bearings |
| Load Direction | Axial Bearing |
| Separable Design | Separated |
| Clearance | C0 C2 C3 C4 C5 |
| Cage Material | Brass, Steel |
| Vibration Level | Z1V1 Z2V2 Z3V3 |
| Hardness | 60-64 HRC |
| HS Code | 8482800000 |
Application Industries
| Industry | Typical Equipment |
|---|---|
| Construction Machinery | Excavators, Loaders, Bulldozers, Cranes |
| Heavy Industry | Rolling Mills, Press Machines, Conveyors |
| Mining | Crushers, Mining Trucks, Drilling Equipment |
Stop Construction Delays with Reliable NNU4934 B/Sp C3 Double Row Cylindrical Roller Bearings
Construction machinery operators know the cost of downtime—when a bearing fails in an excavator or crane, projects stall, labor costs mount, and deadlines slip. Many face the frustration of counterfeit bearings that promise savings but deliver premature failure, or multi-tier suppliers who stretch lead times by 30-50%, making it impossible to align with tight production schedules.
Genuine Double Row Cylindrical Roller Bearings, In Stock for Immediate Delivery
Our NNU4934 B/Sp C3 Double Row Cylindrical Roller Bearing is engineered to resolve these pain points. As an official SKF distributor, we ensure 100% genuine products with full traceability, eliminating the risk of counterfeits that plague gray-market channels. Our large centralized warehouse stocks this construction machinery bearing, allowing for fast emergency delivery to keep your equipment operational and projects on track.
Engineered for Heavy-Duty Construction Environments
This Separated Roller Bearing thrives in the harsh conditions of construction machinery, where heavy radial and axial loads, shock impacts, and variable speeds are common. Its non-aligning design maintains precision under high stress, while the separated inner and outer rings facilitate easy installation and maintenance—critical for minimizing equipment downtime on job sites.
Technical Features That Maximize Equipment Performance
The NNU4934 B/Sp C3 incorporates key engineering details that directly impact operational reliability. Its C3 clearance rating provides optimal internal space to accommodate thermal expansion during continuous heavy use, reducing friction and extending service life. The bearing steel construction achieves 60-64 HRC hardness, ensuring resistance to wear even under extreme loads. Available with brass or steel cages, the design maintains stable roller guidance, while Z1V1 to Z3V3 vibration levels minimize noise and energy loss during operation.
Avoid the Hidden Costs of Substandard Bearings
Choosing uncertified bearings for construction machinery carries significant hidden costs. A single counterfeit bearing failure can cause secondary damage to gears, shafts, and housings, leading to repair bills 5-10 times the cost of a genuine part. In contrast, our Double Row Cylindrical Bearing for Construction meets ISO 9001 and SKF global standards, ensuring batch consistency and predictable performance. By investing in traceable, quality components, you reduce total maintenance costs and protect your equipment investment.
Why Construction OEMs and Maintenance Teams Trust Our Bearings
We serve over 60 countries worldwide, with core markets in Europe, North America, and Southeast Asia, supporting industrial equipment OEMs and maintenance service providers with reliable bearing solutions. Our SKF-certified technical team offers free model selection based on working conditions, installation guidance, and failure analysis—services that reduce your technical burden and downtime risks. Every bearing comes with complete certification documentation, ensuring smooth customs clearance for international projects. With a standardized OEM cooperation process, we provide formal quotations within 24 hours and support small-batch trial orders for quality verification before mass production.
Packaging & Shipping
- Secure carton pallet packaging with SKF authentication labels
- 3-7 business days delivery for in-stock items
- Global door-to-door logistics via DHL, FedEx, UPS, air, or sea freight
- Real-time tracking provided for all shipments
- Minimum order quantity of 1 unit, supporting both emergency repairs and bulk orders
Get Your NNU4934 B/Sp C3 Bearing Shipped Today
Don’t let bearing issues delay your construction projects. Send us your order details—including quantity and application parameters—and our team will confirm availability and provide a quotation within 24 hours. With our fast delivery and technical support, you can restore equipment operation quickly and avoid costly downtime.
Frequently Asked Questions
Q: Are these genuine SKF bearings?
A: Yes, we are an official authorized SKF distributor. Every bearing comes with full traceability documentation to verify authenticity.
Q: How do I confirm if this bearing fits my construction equipment?
A: Provide your equipment model or working condition parameters (load, speed, temperature), and our SKF-certified technical team will verify compatibility.
Q: What is your warranty policy?
A: We adhere to SKF's official warranty standards, offering unconditional replacement for manufacturing defects.
Q: What is the minimum order quantity?
A: We accept orders starting from 1 unit to support emergency maintenance needs.
Q: How long does shipping take?
A: In-stock bearings are delivered within 3-7 business days via your choice of logistics (DHL, FedEx, UPS, air, or sea freight).
Q: How can I verify the bearing's authenticity?
A: Each bearing includes SKF's official packaging withé˜²ä¼ªæ ‡ç¾, laser marking, and traceability certificates. We can also provide verification support through SKF's official channels.
Ready to order or need a quote?
Send your bearing designation, application details, and quantity — we'll respond within 24 hours.
Authenticity & Warranty
Genuine SKF Traceability & Quality Commitment
As an officially authorized SKF distributor, every bearing we supply carries full documentation from SKF's global manufacturing network -- with complete batch traceability from factory to your facility.
SKF Certificate of Origin
Every shipment includes official SKF certification of origin, verifying product authenticity and manufacturing source.
Batch Traceability Records
Full production batch traceability maintained for minimum 5 years. Enables quality audit and failure investigation.
SKF Authorized Distributor Status
Verified annually by SKF. Our authorized status can be confirmed directly through the SKF distributor verification system.
Quality Warranty
All products carry SKF manufacturer warranty. Defective products are replaced or refunded -- no questions asked.
Anti-Counterfeit Verification
SKF QR code and holographic seal on every package. Verify authenticity instantly via SKF's official verification portal.
Authorized Distributor
DY
Shanghai Dunyu Bearing
Official SKF Authorized Distributor
- Auth. Since
- 2010+
- Quality Std.
- ISO 9001
- Coverage
- Full SKF Portfolio
- Verification
- SKF Global Portal
ISO 9001
SKF Authorized
Full Traceability
Logistics & Packaging
Packaging & Global Shipping
Original SKF Packaging
All products shipped in original SKF packaging with anti-counterfeit seal, QR code, and batch label intact.
Export Carton + Wooden Crate
Standard export carton for small orders. Custom wooden crates with moisture-proof lining for large/heavy shipments.
Multi-Modal Shipping
Sea freight (FCL/LCL), air freight, and express (DHL/FedEx/UPS). DDP, DAP, CIF, FOB terms all supported.
Delivery Timeline
In-stock items: 1-3 days dispatch. Air freight: 3-7 days door-to-door. Sea freight: 15-35 days by destination.
Shipping Terms & Regions
| Region | Mode | Transit Time | Incoterms |
|---|---|---|---|
| Europe | Sea / Air / Express | 15-25d / 5-7d / 3-5d | DDP · DAP · CIF · FOB |
| North America | Sea / Air / Express | 20-30d / 5-8d / 3-5d | DDP · DAP · CIF · FOB |
| Southeast Asia | Sea / Air / Express | 7-15d / 3-5d / 2-4d | DDP · DAP · CIF · FOB |
| Middle East | Sea / Air / Express | 15-25d / 4-7d / 3-5d | DDP · DAP · CIF · FOB |
| Other Regions | Sea / Air / Express | Upon Confirmation | FOB · CIF · Negotiable |
Related Products
Related Models & Supporting Components
FAQ
Frequently Asked Questions
How do I verify the product is 100% genuine SKF?
Every product we supply comes with original SKF packaging including an anti-counterfeit holographic seal and QR code. You can scan the QR code on the SKF official website to verify authenticity. We also provide the SKF Certificate of Origin with every shipment, and our authorized distributor status can be verified directly through SKF's global distributor portal.
What is the minimum order quantity (MOQ)?
There is no strict minimum order quantity for standard catalog items. We support single-piece sample orders for testing and evaluation. For bulk procurement and long-term supply programs, we offer preferential pricing and dedicated inventory reservation. Contact our sales team for a customized procurement plan.
How long does it take to receive a formal quotation?
We guarantee a formal quotation with full SKF traceability certification within 24 business hours of receiving your inquiry. For urgent requirements, our team can typically respond within 2 hours during business hours (Mon-Sat, 9:00-18:00 GMT+8). Contact us via WhatsApp for fastest response.
Do you support DDP (Delivered Duty Paid) shipping?
Yes, we fully support DDP, DAP, CIF, and FOB incoterms across 60+ countries. Our logistics team handles all export documentation, customs clearance, and last-mile delivery. We work with leading freight forwarders and express carriers (DHL, FedEx, UPS) to ensure reliable and timely delivery.
Can you provide technical support for bearing selection?
Absolutely. Our SKF-certified engineers provide comprehensive technical support including bearing selection, application analysis, failure investigation, and lubrication planning. We can also assist with housing selection, mounting tool recommendations, and condition monitoring solutions. Technical support is available 24/7 via email and WhatsApp.
What are the payment terms?
We accept T/T (bank transfer), L/C (letter of credit) for large orders, and Western Union. Standard terms are 30% deposit with 70% balance before shipment. For established long-term customers with framework agreements, we offer net payment terms. All transactions are conducted in USD or EUR.
What happens if I receive a defective product?
All products carry the full SKF manufacturer warranty. In the unlikely event of a defective product, we will arrange replacement or full refund -- no questions asked. Our quality team will also conduct a failure analysis to identify the root cause and prevent recurrence. Please retain the original packaging and documentation for warranty claims.
Still have questions? Chat with our SKF engineers →
Start Your Procurement
Get a Formal Quote
Within 24 Hours.
Send us your bearing model, quantity, and delivery requirements. Our SKF-certified team will respond with a formal quotation, traceability certificate, and logistics plan.
- 100% Genuine SKF with Certificate of Origin
- Formal quotation within 24 hours
- Sample orders & bulk supply supported
- DDP/DAP/CIF to 60+ countries
- Dedicated SKF-certified account manager
Send Inquiry -- SKF Bearing Specialist Online