Description
Product Specifications
| Parameter | Details |
|---|---|
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Outer Dimension Range | Medium and Large (120-190mm) |
| Material | Bearing Steel |
| Alignment Type | Non-Aligning Bearings |
| Load Direction | Axial Bearing |
| Separable Design | Separated |
| Internal Clearance | C0, C2, C3, C4, C5 |
| Cage Material | Brass, Steel |
| Vibration Class | Z1V1, Z2V2, Z3V3 |
| Surface Hardness | 60-64 HRC |
| Transport Package | Carton Pallet |
| Origin | Jiangsu, China |
| HS Code | 8482800000 |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Heavy Machinery | Industrial gearboxes, rolling mill rolls, large-scale conveyors |
| Steel & Metallurgy | Continuous casting machines, extrusion equipment |
| Mining | Crusher main shafts, conveyor drive systems |
| Power Generation | Generator rotor supports, turbine auxiliary components |
Tired of Bearing Failures in Heavy-Duty Applications? The NNU4938 B/Sp W33 Double Row Cylindrical Roller Bearing Delivers Reliability
Finding a bearing that can handle the extreme loads and continuous operation of heavy machinery is a constant challenge for maintenance engineers and procurement managers. Premature failures due to misalignment, inadequate load capacity, or poor material quality lead to costly downtime, production losses, and safety risks. Sourcing the right replacement often means navigating complex part numbers across multiple suppliers, delaying critical repairs.
Engineered for Heavy-Duty Machinery Performance
The NNU4938 B/Sp W33 Double Row Cylindrical Roller Bearing addresses these challenges with its robust design and precision engineering. As a double row cylindrical roller bearing with a brass cage, it provides exceptional radial load capacity and rigidity—essential for equipment like rolling mills, crushers, and industrial gearboxes. Our extensive inventory and multi-brand procurement capabilities ensure you can source this exact specification or its equivalents without unnecessary delays, supported by ISO 9001 certified quality control processes.
Where This Bearing Performs Best
This bearing excels in applications where high radial loads and moderate axial loads are present, operating within temperature ranges typical of heavy industrial environments. Its separable design allows for easy installation and maintenance, while the non-aligning configuration suits machinery with minimal shaft deflection. The NNU4938 B/Sp W33 is particularly well-suited for heavy-duty machinery requiring reliable performance under continuous operation, such as steel mill rolling stands and mining equipment drive systems.
Key Engineering Features That Ensure Longevity
The bearing’s 60-64 HRC surface hardness—achieved through precision heat treatment—provides excellent wear resistance and fatigue strength, critical for extending service life in high-stress applications. The brass cage offers superior thermal conductivity and dimensional stability compared to polymer alternatives, reducing friction and heat buildup during high-speed operation. Available internal clearances (C0 to C5) allow customization for specific operating conditions, from tight fits in precision machinery to expanded clearances for thermal expansion in high-temperature environments. The Z1V1 to Z3V3 vibration classes ensure smooth operation, minimizing noise and reducing stress on adjacent components.
Why Choosing the Right Bearing Lowers Total Cost
Selecting a properly specified bearing like the NNU4938 B/Sp W33 directly impacts your bottom line. While initial costs may be higher than inferior alternatives, the extended service life and reduced maintenance requirements significantly lower total cost of ownership. Poorly matched bearings often fail prematurely, leading to unplanned downtime, replacement part expenses, and potential damage to expensive equipment. By following industry standards for load rating and application suitability, this heavy-duty machinery bearing ensures predictable performance and reduces the risk of catastrophic failures, ultimately protecting your production schedule and equipment investment.
Quality You Can Rely On
Our manufacturing and procurement processes adhere to ISO 9001 standards, with rigorous inspection of raw materials and finished products to ensure dimensional accuracy and material integrity. Each bearing undergoes hardness testing, dimensional verification, and surface finish inspection before shipment. We provide a warranty against manufacturing defects, with clear procedures for returns and replacements. Our global network of suppliers allows us to source both standard and hard-to-find bearing models, ensuring you get the exact specifications you need. With substantial inventory, we support quick turnaround for urgent maintenance requirements, helping you minimize equipment downtime.
Packaging & Shipping
- Standard packaging: Carton boxes on wooden pallets, suitable for international shipping
- Stock availability: Ready for immediate dispatch for urgent requirements
- Logistics options: Flexible shipping via express courier, air freight, or sea freight based on delivery timeline
- Order flexibility: Low minimum order quantities available, supporting both small maintenance orders and large production runs
Get the Exact Bearing You Need – Request a Quote Today
Whether you need the NNU4938 B/Sp W33 Double Row Cylindrical Roller Bearing or another specific model, we can provide pricing and availability quickly. Simply share the bearing model number, dimensions (d x D x B), and required quantity, and our team will confirm stock and delivery options. With our multi-brand sourcing capability, we can also assist with cross-referencing part numbers from major manufacturers to find the right fit for your equipment.
Frequently Asked Questions
Q: Can you supply bearings from other brands or with different specifications?
A: Yes, we support procurement of bearings across all major international and domestic brands. We can source to your exact specifications, including custom dimensions and materials where available.
Q: How do I确认 if this bearing is compatible with my equipment?
A: Provide your equipment model number or the bearing’s critical dimensions (bore diameter, outer diameter, width), and our technical team will verify compatibility with the NNU4938 B/Sp W33 or recommend alternatives.
Q: What is your warranty policy for this bearing?
A: We offer a warranty against manufacturing defects. Specific terms depend on application and operating conditions, with details outlined in our sales agreement.
Q: What is the minimum order quantity for this bearing?
A: We accept small orders for maintenance needs, with no strict minimum quantity. Larger volume discounts are available for production orders.
Q: How quickly can you ship the NNU4938 B/Sp W33 bearing?
A: If in stock, we ship within 1-2 business days. For non-stock items, lead times depend on manufacturer availability, typically 2-4 weeks.
Q: Do you offer custom bearing solutions (OEM/ODM)?
A: Yes, we support custom bearing manufacturing based on your drawings or specifications, including specialized materials, coatings, and cage designs.
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.
