Double Row Cylindrical Roller Bearings
Amigo double row cylindrical roller bearings are engineered with precision and available in multiple configurations, featuring either a cylindrical or tapered bore. The comprehensive standard assortment detailed in this section encompasses:
- NNU design bearings
- NN design bearings
- NNUP design bearings
- High Load Carrying Capacity
Double row cylindrical roller bearings, with a secondary row of rollers, are engineered to handle substantial radial loads, making them ideal for heavy-duty applications. - Low Friction
The innovative open flange design, coupled with optimized roller end geometry and surface finish, facilitates the formation of a lubricant film, thereby reducing friction and enhancing axial load capacity. - Extended Service Life
The logarithmic roller profile is designed to minimize edge stresses at the roller/raceway contact, improving resilience to misalignment and shaft deflection. - Enhanced Operational Reliability
The precise surface finish on roller and raceway contact areas promotes the establishment of a hydrodynamic lubricant film, ensuring reliable operation. - Separable and Interchangeable Components
Double row cylindrical roller bearings feature separable components, enhancing ease of installation, removal, and maintenance, with interchangeable parts for flexibility. - High Speed Capability
Specialized cage designs accommodate high speeds, rapid accelerations, and peak load conditions, ensuring optimal performance under demanding circumstances.
Double Row Cylindrical Roller Bearings are engineered for superior radial load capacity and are extensively employed across various industrial sectors. Their advanced precision engineering and versatility render them suitable for a wide array of applications, available in numerous designs, variants, and sizes. Typical applications include:
- Rolling mills
- Gearboxes
- Heavy-duty electric motors
- Machine tools
- Wind turbines
- Railways and locomotives
- Steel processing equipment
- Mining machinery
- Paper mills
- Industrial pumps
Double Row Cylindrical Roller Bearings - Designs and Variants
Basic Design Bearings
Double Row Cylindrical Roller Bearings in their basic design offer high radial load capacity and can handle axial loads in both directions. These bearings are often used in applications requiring increased load handling while maintaining compact design, such as in rolling mills and heavy-duty gearboxes.
Variants/Features
Double Row Cylindrical Roller Bearings come in several variants, including different cage materials (steel or brass), special coatings for enhanced durability, and sealed designs for environments with high contamination. These features enhance performance in industries like mining, steel processing, and wind energy.
Matched Bearings
Matched Double Row Cylindrical Roller Bearings are used where balanced load distribution and higher stiffness are required. These are typically found in applications such as industrial gearboxes, railways, and machinery where multiple bearings must work in parallel to support large loads.
Double Row Cylindrical Roller Bearings Size Chart
| Designation | d [mm] | D [mm] | B [mm] | C [mm] |
|---|---|---|---|---|
| BC2B 320119 | 300 | 460.0 | 180 | |
| 315583 C | 320 | 480.0 | 175 | |
| BC2B 322216 | 320 | 460.0 | 120 | |
| NNU 4164 F | 320 | 540.0 | 218 | |
| NNUP 4964 B/HB1W33 | 320 | 440.0 | 118 | |
| BC2B 320118 | 340 | 520.0 | 305 | 200.0 |
| NNU 4168 M/W33 | 340 | 580.0 | 243 | |
| BC2B 319878 | 350 | 520.0 | 150 | |
| BC2B 322217 | 360 | 500.0 | 125 | |
| BC2B 319961 | 370 | 520.0 | 220 | 193.0 |
| BC2B 320041 | 380 | 540.0 | 200 | |
| BC2B 326131/HB1 | 380 | 540.0 | 130 | |
| NNU 4176 M | 380 | 620.0 | 243 | |
| 314987 B | 400 | 560.0 | 205 | |
| 314987 C | 400 | 560.0 | 205 | |
| BC2B 3236363/HA4 | 400 | 600.19 | 200 | |
| 316019 | 410 | 600.0 | 220 | |
| 314391 | 420 | 620.0 | 200 | |
| 314982 | 420 | 600.0 | 220 | |
| BC2B 326137/HB1 | 420 | 580.0 | 130 | |
| 316077 A | 440 | 620.0 | 225 | |
| BC2B 316521 | 440 | 640.0 | 230 | |
| NNU 4888 KM/W33 | 440 | 540.0 | 100 | |
| NNU 4888 M/W33 | 440 | 540.0 | 100 |
Recommended Reading
Frequently Asked Questions (FAQs)
Q: What are Double Row Cylindrical Roller Bearings used for?
A: They are used in applications requiring high radial load capacity, such as rolling mills, gearboxes, and heavy-duty electric motors.
Q: How do Double Row Cylindrical Roller Bearings differ from single row bearings?
A: Double row bearings can support heavier radial loads and provide greater rigidity, making them suitable for demanding applications.
Q: Can Double Row Cylindrical Roller Bearings handle axial loads?
A: These bearings primarily handle radial loads, but some designs can also accommodate limited axial loads in both directions.
Q: What industries commonly use Double Row Cylindrical Roller Bearings?
A: They are used in industries such as steel manufacturing, mining, railway transportation, and power generation.
Q: Are Double Row Cylindrical Roller Bearings suitable for high-speed applications?
A: Yes, they are designed to perform well under high-speed conditions, especially in equipment like wind turbines and paper mills.
Q: What materials are used in Double Row Cylindrical Roller Bearings?
A: These bearings are typically made from high-quality steel, with options for brass or steel cages to enhance durability.
Q: How are Double Row Cylindrical Roller Bearings lubricated?
A: They generally use oil or grease lubrication to reduce friction and ensure smooth operation in harsh environments.
Q: How do you select the correct size of a Double Row Cylindrical Roller Bearing?
A: The size is determined by the load requirements, operating speed, and space constraints of the application.
Q: Can Double Row Cylindrical Roller Bearings be used in oscillating applications?
A: Yes, they are well-suited for oscillating applications in industries like construction and mining.