Custom Cylindrical Roller Bearings Manufacturer
Shanghai Yinin Bearing & Transmission Company is a China-based Custom Cylindrical Roller Bearings manufacturer with over 20 years of experience. Since 1999, we have evolved from an export agent into an integrated group with our own manufacturing facilities, Jiangsu Dahua Bearing Manufacturing Co., Ltd., and a dedicated quality control center. Our cylindrical roller bearing range covers NU, NJ, NUP, N, and NF series, designed for high radial load capacity, rigidity, and high-speed operation across industrial equipment, automotive, agriculture, and automation sectors.
We supply both standard and customized cylindrical roller bearings in chrome steel and stainless steel, with bore sizes from 10 mm to 200 mm and outer diameters up to 350 mm. Our engineering team works directly with you to match the bearing design to your shaft system, load conditions, and operating environment, ensuring reliable performance and long service life.
Our Cylindrical Roller Bearing Range
Each series in our range offers distinct axial load handling capabilities and mounting characteristics. The table below summarizes the design features and typical applications to help you select the right configuration.
| Series |
Design Feature |
Axial Load Capability |
Typical Applications |
| NU Series |
Two integral flanges on outer ring, no flanges on inner ring |
None (free axial displacement) |
Non-locating bearing positions in gearboxes, electric motors, pumps |
| NJ Series |
One integral flange on inner ring |
Single-direction axial location |
Locating bearing for shafts with moderate axial loads |
| NUP Series |
Two integral flanges on inner ring plus a loose rib |
Bidirectional axial location |
Fixed bearing positions in machine tool spindles, rolling mills |
| N Series |
Two integral flanges on inner ring, no flanges on outer ring |
None (free axial displacement) |
Non-locating positions where outer ring rotates |
| NF Series |
One integral flange on outer ring |
Single-direction axial location |
Locating bearing for outer ring rotation applications |
Application Fit and Engineering Considerations
Cylindrical roller bearings excel in applications where high radial loads, high speeds, and rigidity are critical. Their line contact between rollers and raceways distributes load over a larger area than ball bearings, making them ideal for heavy-duty machinery. We produce bearings with machined brass cages, steel cages, or polyamide cages depending on speed, temperature, and lubrication requirements.
When selecting a series, consider the axial load direction and whether the bearing must act as a locating or non-locating bearing. For example, NU and N series allow axial displacement of the shaft relative to the housing, preventing internal stress due to thermal expansion. NJ and NF series provide single-direction location, while NUP series offers full location in both directions. Our engineers can help you determine the optimal arrangement for your shaft system.
Customization and Configuration Options
We understand that standard catalogs do not always cover every requirement. As a custom cylindrical roller bearings supplier, we offer modifications to internal clearance (C2, C0, C3, C4), precision classes (P0, P6, P5, P4), and cage materials. We can also produce non-standard bore and outer diameters, special widths, and bearings with tapered bore (K suffix) for easy mounting on tapered shafts.
For high-speed applications, we can adjust roller profile and surface finish to reduce edge stress and improve fatigue life. For corrosive environments, stainless steel (AISI 440C) bearings are available. We also supply bearings with seals or shields on request, although open designs are standard for cylindrical roller bearings to allow proper lubrication.
Quality Assurance and Testing
Quality is the foundation of our manufacturing process. We conduct inspections after each production step, from raw material analysis to final assembly. Our quality control center in Jiangsu is equipped with precision measuring instruments to verify dimensional accuracy, running accuracy, and radial clearance. Finished bearings undergo 100% inspection for critical parameters, and we can provide material certificates and inspection reports upon request.
Our factory operates under an integrated quality management system, and we continuously invest in modern equipment to maintain consistency. We test sample bearings for noise, vibration, and temperature rise under load to ensure they meet performance expectations before shipment.
Production Capacity and Delivery
With an annual production capacity of 8 million sets across our group, we can handle both small batches (MOQ from 100 sets) and large-volume orders. In-stock standard sizes are shipped within 3 working days. For custom bearings, lead time depends on complexity and quantity, typically 2-4 weeks after drawing approval. We package bearings with rust-proof oil and wrap them in moisture-proof paper, then export via sea or air freight from Shanghai.
Information We Use to Configure Your Solution
To prepare an accurate quotation and technical proposal, please provide the following details:
- Bearing series and reference number (if replacing an existing bearing)
- Shaft and housing dimensions, fits, and tolerances
- Radial and axial loads, including dynamic and static equivalents
- Operating speed (RPM) and duty cycle
- Lubrication type (grease or oil) and method
- Operating temperature range and environmental conditions
- Required precision class and internal clearance
- Any special materials, cages, or coatings
- Quantity and target delivery schedule
With this information, our engineering team will recommend the most suitable series and configuration, ensuring optimal performance and cost-effectiveness.
Maintenance and Service Support
Proper installation and maintenance are essential for bearing longevity. We provide mounting instructions and recommend suitable tools for press fitting or induction heating. Our bearings are designed for easy disassembly and inspection. We also offer technical support for troubleshooting and can supply spare parts for maintenance programs.
For distributors and OEMs, we offer training on bearing selection and handling, as well as after-sales service to address any issues that arise during operation.
Frequently Asked Questions
What is the difference between NU and NJ series cylindrical roller bearings?
NU series bearings have no flanges on the inner ring, allowing axial displacement of the shaft in both directions. NJ series bearings have a single flange on the inner ring, providing axial location in one direction. Choose NU for non-locating positions and NJ for locating positions where axial load is unidirectional.
Can you manufacture non-standard cylindrical roller bearings?
Yes, we specialize in custom cylindrical roller bearings. We can produce bearings with non-standard dimensions, special materials like stainless steel, and customized internal geometry to meet your application requirements. Provide your specifications, and our engineers will design and manufacture accordingly.
What is the minimum order quantity for custom bearings?
Our MOQ is 100 sets for custom cylindrical roller bearings. This allows us to support prototype development and small-batch production while maintaining cost efficiency. For standard sizes, we can often supply smaller quantities from stock.
How do you ensure bearing quality?
We perform inspections at every stage of production, from incoming raw materials to final assembly. Finished bearings are 100% inspected for dimensional accuracy and running quality. We also conduct performance tests on sample bearings to verify noise, vibration, and temperature characteristics.
What is your typical lead time?
For in-stock standard bearings, we ship within 3 working days. For custom orders, lead time is typically 2-4 weeks after drawing approval, depending on complexity and quantity. We will confirm exact delivery dates when you place your order.
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