Description
Product Specifications
| Parameter | Details |
|---|---|
| Bearing Type | 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 Suitability
| Industry | Typical Applications |
|---|---|
| Heavy Duty Industrial | Industrial machinery, large-scale equipment, power transmission systems |
Struggling with Bearing Failures in Heavy Duty Applications? The NNU4921 B/Sp W33 Double Row Cylindrical Roller Bearing Delivers Reliability
Many industrial operations face unexpected downtime due to bearing failures—especially in heavy duty machinery where misalignment, high loads, and harsh conditions take their toll. Sourcing the right replacement can be frustrating when dimensions don’t match or quality is inconsistent, leading to repeated replacements and increased maintenance costs.
Engineered for Heavy Duty Performance: NNU4921 B/Sp W33 Double Row Cylindrical Roller Bearing
Designed to tackle these challenges, our Double Row Cylindrical Roller Bearing NNU4921 B/Sp W33 offers a separated structure that simplifies installation and replacement, even in tight spaces. As a professional bearing supplier with extensive experience across industrial sectors, we ensure this bearing meets the demands of heavy duty applications through rigorous testing and adherence to international standards, providing a reliable solution for your critical equipment.
Ideal for High-Load, Precision-Demanding Environments
This Heavy Duty Industrial Bearing excels in applications requiring high radial load capacity and precise shaft guidance, such as large gearboxes, rolling mills, and heavy machinery. Its separated design allows for easy mounting and dismounting, making it suitable for scenarios where maintenance access is limited. The W33 cylindrical design further enhances lubrication retention, ensuring consistent performance in continuous operation.
Key Engineering Features That Enhance Durability
Crafted from high-quality Bearing Steel with a hardness of 60-64 HRC, this bearing delivers exceptional wear resistance and fatigue strength, critical for withstanding heavy loads over extended periods. The brass or steel cage options provide stability at high speeds, while clearance grades (C0, C2, C3, C4, C5) allow customization to specific operating conditions—whether you need tight precision or flexibility for thermal expansion. Vibration classes Z1V1 to Z3V3 ensure smooth operation, reducing noise and minimizing stress on connected components.
Why Choosing the Right Bearing Lowers Total Cost
Investing in a quality Double Row Cylindrical Roller Bearing like the NNU4921 B/Sp W33 reduces long-term costs by minimizing downtime and replacement frequency. Inferior bearings with subpar material hardness or imprecise clearances often fail prematurely, leading to unplanned shutdowns and costly repairs. Our bearings undergo strict dimensional and performance testing, aligning with ISO standards to ensure they meet your application’s exact requirements, ultimately lowering your total cost of ownership.
Quality You Can Trust: From Production to Delivery
We maintain ISO 9001 certified processes, from raw material inspection to final product testing, ensuring every bearing meets specified tolerances and performance criteria. Our comprehensive inventory includes both standard and hard-to-find models, allowing us to fulfill orders promptly. We stand behind our products with a warranty against manufacturing defects, providing peace of mind that your investment is protected.
Packaging & Shipping
- Packaged in carton pallets for secure transportation
- Available for immediate dispatch from stock
- Flexible shipping options including express, air, and sea freight
- Low minimum order quantity to support both small repairs and large-scale projects
Get Your NNU4921 B/Sp W33 Bearing Quote Today
Whether you need a single replacement or bulk order, provide us with your required quantity and delivery location, and we’ll deliver competitive pricing and lead times. Our team can also assist with cross-referencing part numbers or confirming compatibility with your equipment—ensuring you get the right bearing the first time.
Frequently Asked Questions
Q: Do you supply bearings from other brands or models?
A: Yes, we offer a full range of bearings across international and domestic brands. Simply provide the brand, model, or dimensions, and we can source or supply the exact specification you need.
Q: How can I confirm if this bearing fits my equipment?
A: Share your equipment model, shaft diameter, housing bore, and load requirements. Our technical team will verify compatibility and recommend the appropriate clearance and cage material if needed.
Q: What is your warranty policy?
A: We provide a warranty against manufacturing defects. Specific terms are outlined in each order contract, covering replacement or refund for bearings that fail due to production issues.
Q: What is the minimum order quantity?
A: We accept low minimum orders, including single units for emergency repairs, with volume discounts available for bulk purchases.
Q: How long does shipping take?
A: In-stock bearings ship within 1-2 business days. Shipping time depends on your location—express delivery takes 3-5 days, while sea freight varies by destination.
Q: Can you customize bearings to specific requirements?
A: Yes, we support OEM/ODM customization, including special clearances, cage materials, and packaging, based on your technical drawings or specifications.
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.
