Product Specifications
| Parameter |
Details |
| Model NO. |
Double Row Cylindrical Roller Bearing |
| Outer Dimension |
Medium and Large(120-190mm) |
| Material |
Bearing Steel |
| Spherical |
Non-Aligning Bearings |
| Load Direction |
Axial Bearing |
| Separated |
Separated |
| Clearance |
C0 C2 C3 C4 C5 |
| Cage |
Brass, Steel |
| Vibration |
Z1V1 Z2V2 Z3V3 |
| Hardness |
60-64 HRC |
| Transport Package |
Carton Pallet |
| HS Code |
8482800000 |
Application Industries
| Industry |
Typical Equipment |
| Construction Machinery |
Excavators, Loaders, Bulldozers |
| Mining |
Crushers, Conveyors, Drilling Rigs |
| Machine Tools |
CNC Lathes, Milling Machines, Spindles |
| Steel |
Rolling Mills, Continuous Casters, Overhead Cranes |
| Industrial Machinery |
Gearboxes, Pumps, Compressors |
Minimize Downtime with Reliable Double Row Cylindrical Roller Bearing NNU4938/4940 B/Sp W33
Maintaining industrial machinery means dealing with unexpected bearing failures that halt production and increase costs. Sourcing authentic double row cylindrical roller bearings often involves long lead times from multiple suppliers, while inconsistent quality across channels raises risks of premature wear in critical equipment like gearboxes and rolling mills.
Authentic Double Row Cylindrical Roller Bearings, In-Stock for Immediate Delivery
Our NNU4938/4940 B/Sp W33 double row cylindrical roller bearing addresses these challenges with genuine quality and ready availability. As an official distributor, we maintain large centralized inventory to support urgent maintenance needs, ensuring you get the right bearing when you need it. Designed for industrial machinery, this bearing combines separated inner and outer rings for easy installation, making it ideal for high-load applications in mining and construction equipment.
Engineered for Heavy-Duty Industrial Machinery Performance
This double row cylindrical roller bearing excels in demanding environments where axial and radial loads are present. With a hardness of 60-64 HRC and vibration grades up to Z3V3, it delivers stable performance in high-speed rotating equipment such as machine tool spindles and steel mill conveyors. The separated design allows for quick replacement during maintenance, reducing downtime and keeping your operations running efficiently.
Key Technical Features That Ensure Longevity
The NNU4938/4940 B/Sp W33 bearing incorporates critical features that directly impact equipment reliability. Its brass cage provides superior strength and heat resistance compared to standard steel cages, ensuring consistent roller spacing and reducing friction in high-temperature applications. Clearance options from C0 to C5 allow precise matching to operating conditions—C3 clearance, for example, accommodates thermal expansion in continuous-duty machinery, while C4 is suited for heavy shock loads in mining equipment. Vibration grades Z1V1 to Z3V3 meet strict noise and stability requirements, making it suitable for precision machine tools where smooth operation is essential.
Avoid Hidden Costs: Why Authenticity Matters for Industrial Bearings
Choosing non-genuine double row cylindrical roller bearings may seem cost-effective initially, but the long-term consequences are significant. Counterfeit bearings often fail prematurely due to substandard materials and poor manufacturing, leading to unplanned downtime, expensive repairs, and potential damage to connected components. Our bearings adhere to ISO 9001 quality standards, with each unit inspected before shipment to ensure compliance with original specifications. By investing in authentic bearings, you reduce total cost of ownership through extended service life and fewer replacements.
Your Trusted Partner for Industrial Bearing Solutions
With official authorization from top bearing brands, we guarantee traceability for every product, backed by complete quality inspection documents. Our cross-brand technical team, with expertise in both European precision and American heavy-duty bearings, provides free选型 support to ensure you get the right fit for your equipment. Serving over 1,200 clients across 55+ countries, we’ve built a reputation for reliable large-project supply and unified quality certification. Our one-stop procurement process simplifies ordering, allowing you to mix brands and receive consolidated delivery, reducing supplier management costs.
Packaging & Shipping
- Secure carton pallet packaging to prevent damage during transit
- 现货 available for delivery within 3-7 working days
- Global logistics options including DHL, FedEx, UPS, air, and sea freight
- Real-time tracking provided for all shipments
- Minimum order quantity of 1 piece, supporting emergency maintenance needs
Get Your NNU4938/4940 B/Sp W33 Bearing Today
Don’t let equipment downtime affect your productivity. Whether you need a single bearing for emergency repair or bulk orders for planned maintenance, we ensure prompt delivery and reliable performance. Send us your requirements now to get started.
Frequently Asked Questions
Q: Are these bearings genuine?
A: Yes, we are an official authorized distributor, and every bearing can be traced to the authentic supply chain with complete authorization documents.
Q: How do I confirm if this bearing fits my equipment?
A: Provide your equipment model or operating parameters, and our technical team will conduct free选型 verification to ensure compatibility.
Q: What is the warranty policy?
A: We adhere to original manufacturer warranty standards, with unconditional replacement for manufacturing defects.
Q: What is the minimum order quantity?
A: We accept orders for 1 piece, supporting urgent maintenance requirements.
Q: How long does shipping take?
A: 现货 items are shipped within 3-7 working days, with flexible logistics options including DHL, FedEx, UPS, air, and sea freight.
Q: How can I verify the authenticity of the bearing?
A: Each bearing comes with original packaging and security labels; we also provide complete traceability documents for verification.
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