Explore our primary line of high-performance slewing gears, dual-axis rotary drives, and industrial-grade four-point contact bearings manufactured at our state-of-the-art facility in Jiangsu.
In modern industrial mechanics, dealing with high loads and angular misalignment is a major challenge. Double row self-aligning roller bearings are uniquely designed to handle these conditions. Featuring two rows of barrel-shaped rollers that run on a common spherical outer ring raceway, these bearings can adapt to misalignment between the shaft and the housing. This configuration distributes loads evenly across both rows, preventing edge stress and premature failure.
These bearings perform exceptionally well in heavy-duty machinery subject to shaft bending or structural deflection under load. Because the center of the outer ring spherical raceway matches the bearing's geometric center, the inner components can tilt dynamically without increasing friction or heat.
From an engineering perspective, this design provides a high radial load rating and a moderate axial load capability in both directions. The rolling elements are kept in alignment by steel, brass, or polyamide cages, depending on the application requirements. For heavy operations like mining vibrating screens, machined brass cages offer the necessary vibration resistance and stability.
By choosing a double row self-aligning roller bearing, you reduce structural fatigue, lower power losses, and extend the L10 operating life of your machinery.
Established in 2022, Jiangsu Manchen Transmission Technology Co., Ltd. is a professional manufacturing enterprise integrating design, research and development, manufacturing, and sales.
The company is located in Huangtu Town, Jiangyin City, Jiangsu Province, with highly convenient transportation and direct access to major maritime logistics hubs. We maintain mature technical conditions and advanced equipment. Relying on precise forging, heat treatment, and precision processing techniques, we provide high-load-bearing, high-strength, and long-life transmission solutions. Our products support applications across construction machinery, medical equipment, intelligent warehousing, the photovoltaic industry, port machinery, industrial robots, environmental protection equipment, and other heavy sectors.
Equipped with advanced testing equipment and a complete quality control system, our processes ensure full traceability from raw material selection to final product delivery, meeting both domestic and international industry standards.
Take a look inside our high-precision machining facility in Jiangsu, featuring automatic tooling, advanced heat treatment lines, and climate-controlled finishing environments.
We manage every stage of manufacturing in-house to ensure material integrity, tight tolerances, and predictable service life for global industrial equipment.
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Our location in Jiangsu places us close to some of China’s leading steel producers. We source vacuum-degassed GCr15 high-carbon chromium steel, ensuring minimal non-metallic inclusions and excellent resistance to subsurface fatigue.
By operating in the Jiangyin industrial cluster, we benefit from an optimized supply chain. We manage forging, heat treatment, and precision grinding within a tight local radius, reducing lead times and transportation costs.
We offer complete OEM/ODM customization. Whether you require custom radial clearances (C3, C4, C5) or specialized brass or steel cages, our engineering team provides direct design calculations and finite element analysis (FEA).
When specifying bearings for heavy duty applications, purchasing managers and design engineers must look beyond basic dimensions. Operating life, rotational accuracy, and load capacities dictate long-term performance. Double row self-aligning roller bearings are engineered to handle high radial loads alongside moderate axial forces.
Standard self-aligning bearings feature symmetrical rollers that adjust to the spherical profile of the outer raceway. Under variable shaft deflections, the rollers maintain line contact with the rings, preventing severe localized stress. Choosing the right bearing requires evaluating several factors:
Proper radial internal clearance keeps the bearing operating reliably at temperature. Normal clearance (CN) is suitable for standard conditions. C3 or C4 clearances are recommended for environments with high heat dissipation (like continuous casting lines or dryer rolls in paper mills) to prevent thermal seizure.
The cage guides the rolling elements. Standard applications utilize pressed steel cages (CC design). For heavy shock loads, high vibration, or extreme accelerations, machined brass cages (CA design) offer superior guidance and durability.
| Parameters | Standard Steel Cage (CC/EC) | Machined Brass Cage (CA/MA) | Polyamide Cage (TVPB) |
|---|---|---|---|
| Operating Temperature | -40°C to +200°C | -50°C to +250°C | -30°C to +120°C |
| Shock & Vibration Resistance | Moderate | Excellent | Good (lightweight applications) |
| Optimal Applications | Pumps, general machinery | Mining screens, paper mills | High-speed gearboxes, fans |
| Lubricant Compatibility | All mineral & synthetic lubricants | Most lubricants; avoid aggressive EP additives | Compatible with standard industrial greases |
Lubrication is critical to bearing life. The W33 suffix indicates a circumferential groove with three lubrication holes in the outer ring. This feature ensures lubricant reaches the rolling paths, flushing away debris and cooling the assembly.
The company has always adhered to the business philosophy of "quality first, mutual cooperation and win-win", providing high-quality services and reliable products to both new and existing customers.
Vibrating screens, crushers, and conveyors operate under high shock loads and dusty conditions. Our double row self-aligning roller bearings, equipped with heavy-duty seals, keep dirt out and retain grease, reducing unplanned downtime in harsh mining environments.
Wind turbine yaw systems and solar tracking drives experience constant changes in load direction and high wind torque. Our slew drives and bearings are designed to handle high overturning moments, maintaining precise alignment and stable tracking control.
Find technical answers to common questions about selecting, mounting, and maintaining double row self-aligning bearings.
Under normal operating conditions, double row self-aligning roller bearings can accommodate angular misalignment from 1.5° to 2.5° between the inner and outer rings. The exact limit depends on the bearing series, seal design, and internal clearances. Exceeding this limit can cause roller edge stress, reducing overall bearing life.
The W33 configuration includes an annular groove and three lubrication holes in the outer ring. This design enables direct relubrication into the center of the bearing, ensuring even grease distribution to both rows of rollers. It also helps flush out old grease and contaminants, which is essential for heavy industrial machinery.
Choose a machined brass cage (CA) for applications with high shock loads, strong vibrations, or high accelerations (such as vibrating screens and paper mills). The brass cage is guided by the inner ring or the rollers, offering higher stability and lower friction. For general-purpose applications with stable loads, a pressed steel cage (CC) is a cost-effective choice.
Key parameters include steel quality (GCr15), heat treatment stability, machining tolerances (ISO grade P6 or P5), and internal clearance matching (CN, C3, or C4). Working with a manufacturer that provides full material traceability and non-destructive testing (NDT) reports, like Jiangsu Manchen, ensures consistent quality.
In addition, we have established long-term cooperative relationships with many well-known domestic enterprises. With stable quality and complete after-sales services, we have won wide recognition in the market. In the future, the company will continue to focus on technological upgrading in the transmission field, and strive to provide global customers with higher-quality and more cost-effective rotary transmission products and services.
Explore our range of compact slewing bearings, L-type configurations, and double-row contact ball swivel designs engineered for high overturning moments.
Manchen Transmission