Product Specifications
| Parameter |
Details |
| Model NO. |
NNU4921BK/SPW33 |
| Type |
Cylindrical Roller Bearing |
| Number of Row |
Double Row |
| Inner Diameter |
105 mm |
| Seals Type |
Open |
| Trademark |
SKF |
| Origin |
China |
| Selling Units |
Single Item |
| Single Gross Weight |
0.100 kg |
Application Industries
| Industry |
Typical Equipment |
| Construction Machinery |
Excavator gearboxes, loader axles |
| Mining |
Crusher main shafts, conveyor rollers |
| Machine Tools |
CNC lathe spindles, milling machine gearboxes |
| Steel |
Rolling mill stands, continuous casting machines |
Prevent Costly Downtime with Genuine SKF NNU4921BK/SPW33 Cylindrical Roller Bearing
Industrial machinery operators know the frustration: unexpected bearing failures halt production lines, emergency replacements take weeks to source, and mixed-brand orders create coordination headaches. When your equipment relies on precision components like the NNU4921BK/SPW33 bearing, choosing the wrong supplier can mean the difference between smooth operation and costly downtime.
Genuine SKF Bearings, In Stock for Immediate Delivery
As an official SKF distributor, we eliminate these pain points with authentic NNU4921BK/SPW33 cylindrical roller bearings ready for immediate shipment. This double row open type bearing, designed for industrial machinery, features SKF’s precision engineering to handle radial loads in high-speed applications. Our centralized inventory ensures you avoid long lead times, whether you need a single unit for emergency repair or bulk quantities for scheduled maintenance.
Engineered for Heavy-Duty Industrial Performance
The NNU4921BK/SPW33 thrives in demanding environments where reliability is non-negotiable. Its double row cylindrical design delivers exceptional radial load capacity, making it ideal for machine tool spindles, gearboxes, and conveyor systems operating under continuous stress. The open type construction allows for easy lubrication maintenance, ensuring optimal performance even in dusty industrial settings common in mining and construction sites.
Technical Design That Maximizes Machine Uptime
This bearing’s technical specifications directly impact your equipment’s performance and longevity. The 105 mm inner diameter provides precise shaft fitting, critical for maintaining alignment in high-torque applications. The double row configuration distributes load evenly across contact surfaces, reducing wear and extending service life compared to single row alternatives. As an SKF industrial roller bearing, it adheres to strict manufacturing tolerances that minimize vibration and noise—key factors in precision machinery operation.
Why Authenticity Matters for Your Bottom Line
Non-genuine bearings may cost less upfront, but they often fail prematurely, leading to unplanned downtime. A single hour of production loss in manufacturing can exceed the cost of ten genuine bearings. Our NNU4921BK/SPW33 bearings come with complete traceability documentation, ensuring you receive components that meet SKF’s rigorous quality standards. This commitment to authenticity reduces the risk of catastrophic failures that damage expensive machinery and endanger operator safety.
Your Trusted Partner for Industrial Bearings
With 1,200+ clients across 55+ countries, we’ve built our reputation on delivering reliable bearing solutions. As dual-brand authorized distributors for SKF and Timken, we offer one-stop mixed procurement that simplifies your supply chain. Our ISO 9001 quality inspection system ensures every bearing meets specifications before shipment. Our cross-brand technical team provides expert support for installation and troubleshooting, while our global logistics network ensures timely delivery to major markets including Australia, Russia, and Saudi Arabia.
Packaging & Shipping
- Original SKF packaging with product identification and batch traceability
- Protective outer packaging to prevent damage during transit
- Package Size: 20.00cm × 20.00cm × 20.00cm
- Package Gross Weight: 0.200kg per unit
- Global shipping via DHL, FedEx, or UPS with tracking provided
- 1-piece minimum order supported for emergency repairs
Get Your Bearing Shipped Today
Don’t let equipment downtime erode your profitability. Whether you need the NNU4921BK/SPW33 bearing for scheduled maintenance or emergency replacement, our ready inventory means you can get back to production faster. Submit your order details now and reduce your machinery’s idle time.
Frequently Asked Questions
Q: Is this a genuine SKF bearing?
A: Yes, we are an official SKF authorized distributor. Every bearing comes with full traceability documentation and can be verified through SKF’s official channels.
Q: How do I confirm this bearing fits my equipment?
A: Provide your equipment model or technical specifications, and our cross-brand technical team will verify compatibility at no cost.
Q: What is your warranty policy?
A: We stand behind product authenticity and quality. All bearings come with SKF’s standard manufacturer warranty covering material and manufacturing defects.
Q: What is the minimum order quantity?
A: We accept orders for 1 piece, ideal for emergency maintenance needs, with no maximum order restrictions.
Q: How quickly can you ship this bearing?
A: In-stock items ship within 3-7 business days via your preferred logistics method (DHL, FedEx, UPS, air, or sea freight).
Q: How can I verify the bearing’s authenticity?
A: Each SKF bearing features laser-etched markings, packaging with security holograms, and batch codes that can be validated through SKF’s official verification system.
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