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 |
| HS Code |
8482800000 |
Application Industries
| Industry |
Typical Equipment |
| Manufacturing |
Machine Tool Spindles, CNC Machine Main Shafts |
| Industrial Machinery |
Spindle Main Shafts, Precision Rotating Equipment |
Prevent Spindle Failures with NU320 EC J/C3 Double Row Cylindrical Roller Bearing
Machine tool operators know the cost of unexpected spindle downtime—lost production, missed deadlines, and costly repairs. When a spindle bearing fails prematurely, it’s often due to incorrect clearance, poor material quality, or incompatible design for high-speed applications. Sourcing reliable bearings that meet strict precision standards can be a challenge, especially when balancing lead times and customization needs.
Engineered for Spindle Performance: NU320 EC J/C3 Bearing
The Double Row Cylindrical Roller Bearing NU320 EC J/C3 is designed to address these pain points, offering C3 clearance optimized for spindle main shafts. With over 18 years of manufacturing experience, our bearings are produced using high-grade chrome steel and precision processing equipment, ensuring stable performance even in continuous operation. As a professional integrated manufacturer, we support both standard orders and OEM/ODM customization to match specific spindle requirements.
Optimal Performance in High-Speed Spindle Applications
This NU320 EC J/C3 Spindle Bearing excels in machine tool spindles where high rotational speed and radial load capacity are critical. The separated design allows for easy installation and maintenance, while the C3 clearance provides the necessary thermal expansion room during high-speed operation, reducing friction and extending service life. Whether used in CNC lathes, milling machines, or grinding equipment, this bearing delivers consistent precision under demanding conditions.
Key Technical Features That Matter
The performance of the Main Shaft C3 Clearance Roller Bearing is defined by its critical technical attributes. The 60-64 HRC hardness ensures wear resistance, maintaining dimensional stability even under heavy loads. The brass or steel cage options provide durability and efficient roller guidance, crucial for minimizing vibration (Z1V1 to Z3V3 grades) in high-precision applications. With C3 clearance, the bearing accommodates thermal growth in spindle systems, preventing seizure and ensuring smooth rotation at varying speeds. These features collectively contribute to a bearing that meets ISO industrial standards, as verified by our in-house laboratory testing.
Why Genuine Bearings Reduce Total Cost of Ownership
Choosing genuine Double Row Cylindrical Roller Bearing NU320 over counterfeit alternatives directly impacts your bottom line. Counterfeit bearings often lack proper material heat treatment and precision machining, leading to early failure—costing more in downtime and replacement than the initial savings. Our bearings undergo strict incoming material inspection and full-process supervision, certified by ISO 9001:2015 and ISO 14001. With a 12-month warranty and free replacement for qualified defects, the long-term reliability of our products lowers total ownership costs significantly.
Our Commitment to Reliable Supply
With a production capacity of 1,000,000 units annually and a global sales network covering Europe, North America, and Southeast Asia, we ensure stable supply for both standard and custom orders. Our flexible MOQ policy allows for 1 piece orders on standard bearings, ideal for emergency repairs, while bulk orders ship within 5-15 working days. A professional technical team provides free guidance on selection and installation, supported by remote troubleshooting. We accept multiple secure payment methods, including T/T, Credit Card, and Alibaba platform orders, ensuring a smooth transaction process.
Packaging & Shipping
- Carton pallet packaging to ensure product protection during transit
- Sample orders shipped within 3-5 working days, bulk orders within 5-15 working days
- Flexible logistics options including express, air, and sea freight
- Real-time logistics tracking provided for all shipments
- 1 piece MOQ for standard bearings, supporting small-batch and emergency needs
Secure Your Spindle Performance Today
Don’t let substandard bearings compromise your machine tool productivity. The NU320 EC J/C3 Spindle Bearing is in stock and ready to ship, with the technical support to ensure proper integration into your spindle system. Whether you need a single unit for maintenance or bulk orders for production, we deliver the reliability your operations demand.
Frequently Asked Questions
Q: Is this bearing genuine and traceable?
A: Yes, all our bearings are manufactured in-house with strict quality control, compliant with ISO standards. We provide full production and testing records for traceability.
Q: How do I confirm if NU320 EC J/C3 is suitable for my spindle?
A: Our technical team can assist with选型 based on your spindle specifications, load requirements, and operating speed. Provide your equipment details for personalized guidance.
Q: What is the warranty policy for this bearing?
A: We offer a 12-month warranty from the date of delivery, covering manufacturing defects. Qualified defective products can be replaced free of charge or refunded.
Q: What is the minimum order quantity?
A: The MOQ for standard bearings like NU320 EC J/C3 is 1 piece, supporting both small repairs and large-scale production needs.
Q: How quickly can I receive my order?
A: Sample orders ship within 3-5 working days, while bulk orders take 5-15 working days. Expedited shipping options are available upon request.
Q: How can I verify the bearing’s quality upon receipt?
A: Each bearing undergoes dimensional and performance testing before shipment. We provide test reports upon request, and our team can guide you through visual and functional inspections.
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