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 |
|---|
| Heavy Machinery | Industrial Gearboxes, Large Motors, Press Machines |
| Manufacturing | Rolling Mills, Conveyors, Machine Tools |
| Mining & Construction | Crushers, Excavators, Heavy Duty Pumps |
| Power Generation | Generators, Turbines, Compressors |
Stop Production Delays with NNU4921 B/Sp W33 Double Row Cylindrical Roller Bearing
Industrial maintenance teams know the frustration of equipment downtime caused by bearing failures. Sourcing reliable heavy duty bearings often means coordinating with multiple suppliers, facing long lead times for separated design bearings, and struggling to verify quality across different channels. When your heavy machinery grinds to a halt, every hour of delay impacts production schedules and bottom lines.
Authorized Quality, Ready for Immediate Shipment
As an official SKF solution provider, we ensure the NNU4921 B/Sp W33 Double Row Cylindrical Roller Bearing meets global quality standards through full-process control. Our separated design bearing is stocked in our central warehouse, supporting emergency maintenance needs with fast delivery. Whether your application involves industrial gearboxes, large motors, or heavy duty pumps, this bearing delivers the performance you need without the wait.
Engineered for Heavy Duty Machinery Performance
The NNU4921 B/Sp W33 excels in demanding industrial environments where heavy radial and axial loads are present. Its separated design allows for easy mounting and dismounting, a critical advantage during maintenance operations. With a hardness of 60-64 HRC, this bearing withstands the rigors of continuous operation in mining equipment, rolling mills, and power generation machinery, ensuring reliable performance under extreme conditions.
Key Technical Features That Matter
The clearance options (C0, C2, C3, C4, C5) allow precise matching to your specific operating conditions, optimizing load distribution and reducing heat generation. Cage materials—brass and steel—provide durability and stability, even at high speeds, while the Z1V1 to Z3V3 vibration grades ensure smooth operation, minimizing noise and extending equipment life. The non-aligning design maintains accuracy in applications where shaft alignment is critical, preventing premature wear and potential equipment damage.
Why Genuine Bearings Reduce Total Cost
Choosing authentic heavy duty cylindrical roller bearings like the NNU4921 B/Sp W33 avoids the hidden costs of counterfeit products. Fake bearings often fail early, leading to unplanned downtime, expensive repairs, and potential damage to surrounding components. Our bearings, compliant with SKF global standards, offer consistent performance and longer service life, lowering your total cost of ownership by reducing maintenance frequency and extending equipment uptime.
Our Commitment to Your Operations
With official authorization covering full product categories, we provide one-stop procurement for all your bearing needs. Our sealing and lubrication engineering team offers professional support for installation and maintenance, ensuring optimal performance. Serving over 900 clients across 50+ countries, we deliver emergency maintenance products quickly, minimizing your downtime. Every bearing undergoes strict quality inspection before shipment, with complete documentation for compliance and traceability.
Packaging & Shipping
- Secure carton pallet packaging to prevent damage during transit
- Expedited delivery for urgent orders, with现货 available for prompt dispatch
- Flexible shipping options including DHL, FedEx, UPS, air, and sea freight
- Real-time logistics tracking provided for all shipments
- Minimum order quantity of 1 piece, supporting both maintenance and project requirements
Restore Your Machinery's Performance Today
Don't let bearing issues slow down your production. The NNU4921 B/Sp W33 Double Row Cylindrical Roller Bearing is ready to ship, ensuring your heavy duty machinery gets back to work quickly. Contact us now with your requirements, and we'll help you secure the right bearing for your application.
Frequently Asked Questions
Q: Are these bearings genuine and authentic?
A: Yes, we are an official authorized SKF solution provider, and all products are sourced through genuine supply chains with complete traceability documentation.
Q: How can I confirm if this bearing fits my equipment?
A: Provide your equipment model or specific operating parameters, and our technical team will verify compatibility and offer选型 support at no cost.
Q: What is the warranty policy for this bearing?
A: We adhere to SKF's official warranty standards, covering manufacturing defects with unconditional replacement or refund.
Q: What is the minimum order quantity?
A: We accept orders starting from 1 piece, supporting emergency maintenance and small-batch procurement needs.
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 documentation. We provide verification support through official channels to confirm authenticity.
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