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 |
| Specification |
As Your Request |
| Trademark |
zhaoyun |
| Origin |
Jiangsu China |
| HS Code |
8482800000 |
| Production Capacity |
1000000 |
Application Industries
| Industry |
Typical Equipment |
| Industrial Manufacturing |
Air Compressors |
Stop Air Compressor Downtime with High Precision NUP311 EC Cylindrical Roller Bearings
Air compressor operators know the cost of unexpected downtime—missed deadlines, disrupted production, and expensive repairs. Many face the frustration of bearings failing prematurely due to poor precision or incompatible clearance, especially in high-pressure applications. Sourcing reliable, application-specific bearings often means navigating minimum order quantities that don’t fit maintenance needs or dealing with long lead times when every hour counts.
Engineered for Air Compressor Reliability: NUP311 EC Double Row Cylindrical Roller Bearing
Our Double Row Cylindrical Roller Bearing NUP311 EC N M/C3 is designed to address these challenges, delivering the performance air compressors demand. With a separated structure for easy installation and maintenance, this bearing handles axial loads efficiently while maintaining high precision. Crafted from premium bearing steel with a hardness of 60-64 HRC, it ensures stable operation even in the continuous duty cycles of industrial air compressors. Whether you’re replacing a worn bearing or sourcing for new equipment, we support orders from 1 piece, making emergency repairs and small-batch purchases feasible without compromising on quality.
Optimal Performance in Air Compressor Applications
Air compressors operate under demanding conditions—high rotational speeds, varying loads, and continuous vibration. The NUP311 EC bearing’s cylindrical roller design distributes load evenly across the raceways, reducing stress and extending service life. Its non-aligning structure is ideal for compressors where shaft alignment is critical, while the C3 clearance grade accommodates thermal expansion during prolonged operation, preventing seizure and overheating. This combination of features makes it a reliable choice for both piston and rotary screw air compressors, ensuring consistent airflow and minimizing unplanned maintenance.
Key Technical Features That Matter for Air Compressors
The performance of your air compressor depends on critical bearing specifications. The NUP311 EC’s brass or steel cage options balance durability and weight, with brass cages offering superior heat resistance for high-temperature compressor environments. Vibration grades Z1V1 to Z3V3 allow customization based on noise requirements, ensuring the bearing operates quietly without sacrificing stability. The separated design not only simplifies installation but also allows for thorough inspection and lubrication, essential for maximizing bearing life in dusty or humid workshop conditions. With 60-64 HRC hardness, the bearing resists wear even under the constant friction of air compressor operation, reducing the need for frequent replacements.
The Hidden Costs of Low-Quality Air Compressor Bearings
Choosing an inferior bearing for your air compressor may seem cost-effective initially, but the long-term expenses tell a different story. A bearing with subpar precision can cause excessive vibration, leading to premature wear on other compressor components like rotors and seals. Poor material quality often results in early failure, with downtime costs quickly outpacing the initial savings. Our NUP311 EC bearing meets strict production standards, with full-process quality control from raw material inspection to final performance testing. By investing in a high-precision, durable bearing, you reduce total cost of ownership through fewer replacements, lower maintenance labor, and uninterrupted production.
Why Industrial Buyers Choose Saifan Bearings
With over 15 years of bearing manufacturing and export experience, Saifan Bearings combines technical expertise with reliable service. Our factory is equipped with advanced precision processing equipment and automated production lines, ensuring consistent quality across every batch. We hold ISO 9001:2015 and ISO 14001 certifications, reflecting our commitment to quality management and environmental responsibility. Our technical team provides free guidance on bearing selection, installation, and maintenance, helping you avoid costly选型 mistakes. For distributors and wholesalers, we offer free samples (freight borne by the customer) to verify performance before placing bulk orders. With 3-5 working days for sample delivery and 5-15 days for bulk orders, we ensure you get the bearings you need when you need them.
Packaging & Shipping
- Standard packaging: Carton pallet for secure transportation
- Sample orders shipped within 3-5 working days
- Bulk orders delivered in 5-15 working days
- Multiple logistics options available to meet your delivery timeline
- 1 piece MOQ for standard bearings, supporting emergency repair needs
Get Your NUP311 EC Bearing Shipped Today
Don’t let bearing issues slow down your air compressor operation. Whether you need a single replacement bearing or a bulk order for production, we’re ready to fulfill your request. Send us your bearing model, application details, and quantity, and our team will provide a quote within 24 hours. With our fast delivery and reliable quality, you can get your compressor back to full capacity with minimal delay.
Frequently Asked Questions
Q: Is this bearing suitable for high-pressure air compressors?
A: Yes, the NUP311 EC Double Row Cylindrical Roller Bearing is designed to handle axial loads and high rotational speeds, making it suitable for high-pressure air compressor applications. Its C3 clearance grade accommodates thermal expansion, ensuring stable performance under continuous operation.
Q: How can I confirm if this bearing fits my specific air compressor model?
A: Provide your air compressor’s model number, shaft diameter, and operating conditions (speed, load, temperature), and our technical team will verify compatibility and provide free选型 guidance.
Q: What is the warranty policy for this bearing?
A: We offer a 12-month warranty from the date of delivery. Qualified defective products can be replaced free of charge with your next bulk order or via direct refund.
Q: What is the minimum order quantity for this bearing?
A: The minimum order quantity for standard bearings is 1 piece, supporting both emergency repairs and small-batch purchases.
Q: How quickly can I receive my order?
A: Sample orders are shipped within 3-5 working days, and bulk orders take 5-15 working days. We offer flexible logistics options to meet your delivery needs.
Q: How do you ensure the quality of the bearings?
A: All products
Tags:
Air Compressor Bearing
Cylindrical Roller Bearing for Air Compressor
Double Row Cylindrical Bearing M/C3
Double Row Cylindrical Roller Bearing
High Precision NUP311 EC Bearing
High-Precision Cylindrical Bearing
NUP311 EC Bearing
NUP311 EC N M/C3 Bearing
