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 |
| Industrial Machinery |
Machine Tools, Gearboxes, Reducers |
| Manufacturing |
Printing Machines, Conveyors, Compressors |
| Agricultural Equipment |
Tractors, Harvesters, Heavy Duty Machinery |
| Engineering |
Excavators, Construction Machinery |
Reduce Downtime with Precision Double Row Cylindrical Roller Bearing NU321-Ec J for Industrial Machinery
Industrial machinery operators know the cost of unexpected downtime—hours lost to bearing failures, maintenance delays, and production halts. When bearings fail prematurely due to poor quality or incorrect specifications, the impact ripples through entire operations. Sourcing reliable bearings that meet exacting standards often means navigating complex supply chains with minimum order requirements that don’t align with urgent repair needs.
Engineered for Reliable Performance in Industrial Machinery
The Double Row Cylindrical Roller Bearing NU321-Ec J with C3 Clearance is designed to address these challenges. As a professional bearing manufacturer with decades of experience, we produce high-standard bearings from P0 to P4 precision grades, ensuring this cylindrical roller bearing delivers consistent performance in industrial machinery applications. Whether used in gearboxes, printing machines, or reducers, its separated design allows for easy installation and maintenance, reducing downtime during replacements.
Optimal Performance in Demanding Industrial Conditions
This double row cylindrical roller bearing excels in heavy-load industrial environments, where axial and radial forces are constant. With a hardness of 60-64 HRC, it withstands wear and tear even in high-cycle operations, making it ideal for machine tools and construction equipment. The C3 clearance ensures thermal expansion compensation, critical for machinery operating at varying temperatures, while vibration grades Z1V1 to Z3V3 minimize noise and ensure smooth rotation under load.
Key Technical Features That Drive Machinery Efficiency
The NU321-Ec J bearing’s design incorporates several technical elements that directly impact machinery performance. Its bearing steel construction provides the durability needed for continuous operation, while the brass or steel cage options offer flexibility—brass cages excel in high-speed applications, distributing lubrication evenly to reduce friction. The separated inner and outer rings allow for easy mounting, a crucial advantage during maintenance when time is critical. With outer dimensions ranging from 120-190mm, this medium-to-large bearing balances load capacity with space efficiency, fitting seamlessly into standard industrial machinery designs.
Why Quality Bearings Lower Total Operational Costs
Choosing substandard bearings may seem cost-effective initially, but the hidden expenses add up quickly. Early failures lead to unplanned maintenance, replacement parts, and production losses that far exceed the initial savings. Our cylindrical roller bearings meet ISO international standards, ensuring reliability and longevity. With a strict quality control process—from raw material inspection to full-process production supervision—we guarantee each bearing performs as expected, reducing the risk of costly downtime. For distributors and industrial buyers, this means stable supply and consistent quality, lowering the total cost of ownership over time.
Your Trusted Partner for Industrial Bearings
Since 2005, Jinan Saifan Bearing Co., Ltd has supplied bearings to brand owners, distributors, and industrial buyers across Europe, North America, Southeast Asia, and the Middle East. Our ISO 9001:2015 and ISO 14001 certifications reflect our commitment to quality and environmental responsibility. We offer flexible order policies, including 1 piece MOQ for standard bearings, ensuring you get the exact quantity needed—whether for emergency repairs or bulk production. Our professional technical team provides free guidance on selection and installation, while our 12-month warranty covers manufacturing defects, offering peace of mind with every purchase.
Packaging & Shipping
- Secure carton pallet packaging to protect bearings during transit
- Sample orders shipped within 3-5 working days, bulk orders within 5-15 working days
- Multiple logistics options including international couriers and sea freight
- Real-time logistics tracking provided for all shipments
- 1 piece MOQ available for standard bearings, supporting urgent maintenance needs
Get Your NU321-Ec J Bearing Today
Don’t let bearing issues disrupt your operations. Whether you need a single replacement or bulk order, we ensure fast delivery and reliable performance. Send us your specifications, application details, and quantity, and our team will provide a tailored quote within 24 hours. Keep your machinery running smoothly with bearings designed for industrial durability.
Frequently Asked Questions
Q: Is this bearing a genuine product?
A: Yes, we are a professional manufacturer with strict quality control processes. All products meet ISO standards and are backed by our ISO 9001:2015 certification.
Q: How do I confirm if this bearing fits my equipment?
A: Provide your equipment model or specific dimensions (bore, outer diameter, width), and our technical team will verify compatibility for free.
Q: What is the warranty period for this bearing?
A: We offer a 12-month warranty from the date of delivery, covering manufacturing defects with free replacement or refund options.
Q: What is the minimum order quantity?
A: Standard bearings have a 1 piece MOQ, making it easy to order replacements or small quantities for testing.
Q: How long does shipping take?
A: Sample orders ship in 3-5 working days, bulk orders in 5-15 working days, with tracking provided once shipped.
Q: How can I ensure the bearing’s quality upon receipt?
A: Each bearing undergoes strict finished product inspection. Contact our team for certificates of conformity or test reports if needed.
Ready to order or need a quote?
Send your bearing designation, application details, and quantity — we’ll respond within 24 hours.
