Product Specifications
| Parameter |
Details |
| Model NO. |
NF311EM |
| Outer Dimension |
35mm-180mm |
| Material |
Bearing Steel |
| Spherical |
Non-Aligning Bearings |
| Load Direction |
Radial Bearing |
| Separated |
Separated |
| Product Name |
Cylindrical Roller Bearing 307 |
| Bore Size |
15-90 mm |
| Structure |
Cylindrical |
| Lubrication |
Grease or Oil |
| Precision Rating |
P0 P6 P5 P4 P2 |
| Vibration |
Z1V1 Z2V2 Z3V3 |
| Service |
OEM ODM |
| Transport Package |
Carton Pallet |
| Specification |
55*120*29mm |
| Trademark |
BDL |
| Origin |
China |
| HS Code |
8482500090 |
| Production Capacity |
100000 |
Application Industries
| Industry |
Typical Equipment |
| Industrial Machinery |
Machine Tools, Printing Machinery, Reducers |
| Auto Manufacturing |
Automotive Components, Gearboxes |
| Agricultural Machinery |
Harvesters, Tractors |
| New Energy |
Wind Turbines, Photovoltaic Equipment |
| Construction Machinery |
Excavators, Heavy-Duty Equipment |
Minimize Downtime with Reliable NU311EM NUP311EM Cylindrical Roller Bearings for Industrial Machinery
Industrial machinery operators know the frustration of unexpected downtime caused by bearing failures. When low-quality bearings fail prematurely, production lines halt, repair costs mount, and deadlines are missed. Sourcing precision bearings that balance performance, availability, and cost remains a constant challenge for maintenance managers and procurement teams.
Precision Cylindrical Roller Bearings Engineered for Industrial Reliability
Our Cylindrical Roller Bearing NU311EM NUP311EM series addresses these pain points with P0-P4 precision ratings and Z1V1-Z3V3 vibration grades, ensuring stable operation in industrial machinery. As an integrated manufacturer with ISO9001 and ISO14001 certifications, we offer 1pc MOQ for standard items, 3-5 days sample lead time, and 5-15 days bulk delivery—perfect for both emergency repairs and planned maintenance. These bearings are designed for radial load applications in machine tools, reducers, and printing equipment, where precision and durability are non-negotiable.
Optimal Performance in Demanding Industrial Conditions
Cylindrical Roller Bearings excel in high-speed, heavy-load industrial environments. The separated structure allows for easy installation and maintenance, while the bearing steel construction provides robust wear resistance. Whether operating in dust-filled factories or high-temperature settings, these bearings maintain their precision, supporting continuous production in critical machinery like CNC lathes and conveyor systems. Their radial load capacity makes them ideal for equipment where axial movement is minimal but radial force is significant.
Technical Excellence That Drives Machinery Performance
The precision rating (P0-P4) directly impacts machinery accuracy—P4 bearings, for instance, reduce vibration and noise in high-speed spindles, improving finished product quality. Vibration grades (Z1V1-Z3V3) ensure smooth operation, extending bearing life by minimizing internal friction. The 55*120*29mm specification balances load capacity and space constraints, fitting seamlessly into standard industrial equipment designs. Grease or oil lubrication flexibility allows adaptation to specific operating conditions, from low-maintenance gearboxes to high-speed machine tool spindles.
Long-Term Value: Authentic Bearings vs. Hidden Costs of Inferior Alternatives
Choosing genuine Cylindrical Roller Bearings eliminates the hidden costs of counterfeit products. Fake bearings often fail within months, causing secondary damage to shafts and housings. Our 12-month global warranty covers manufacturing defects, and we provide free technical guidance to ensure proper installation—reducing the risk of premature failure. While initial costs for genuine bearings may be higher, the extended service life and reduced downtime result in lower total cost of ownership over time, especially in high-throughput industrial settings.
Why Industrial Buyers Choose Saifan Bearings
With over 18 years of experience manufacturing bearings for global markets, we combine R&D expertise with strict quality control. Our QC lab conducts rigorous testing on every batch, ensuring compliance with international standards. We support OEM/ODM customization to meet unique machinery requirements, and our flexible payment options (T/T, credit card, Alibaba trade) simplify transactions. Our Jinan facility maintains large inventories, enabling fast delivery to Europe, America, Southeast Asia, and the Middle East. When you partner with us, you gain a reliable supplier committed to stable supply and competitive pricing.
Packaging & Shipping
- Carton and pallet packaging for secure transportation
- 3-5 days lead time for samples, 5-15 days for bulk orders
- Multiple shipping options including express, air, and sea freight
- Real-time logistics tracking provided for all orders
- 1pc minimum order quantity available for standard items
Secure Your Machinery’s Performance Today
Don’t let bearing failures disrupt your production schedule. Whether you need NU311EM, NUP311EM, or other cylindrical roller bearings, we have the inventory and expertise to meet your needs. Send us your requirements, and our team will provide a tailored quote to keep your machinery running smoothly.
Frequently Asked Questions
Q: Are these bearings genuine and traceable?
A: Yes, we are an integrated manufacturer with full quality control processes. Each bearing is produced in our ISO-certified facility and can be traced through our production records.
Q: How do I confirm the correct bearing size for my equipment?
A: Provide your equipment model or existing bearing dimensions (bore size, outer diameter, width), and our technical team will verify compatibility at no cost.
Q: What is your warranty policy?
A: We offer a 12-month global warranty covering manufacturing defects. Defective products will be replaced or refunded based on inspection results.
Q: What is the minimum order quantity?
A: Standard items have a 1pc MOQ, supporting both emergency repairs and small-batch purchases.
Q: How long does shipping take to [my location]?
A: Sample lead time is 3-5 days, bulk delivery 5-15 days. Shipping time depends on location—contact us with your address for a specific estimate.
Q: Can you provide technical data sheets for these bearings?
A: Yes, we supply detailed technical specifications including load ratings, speed limits, and material composition upon request.
