Brought to you by Wafangdian JinYu Bearing Manufacturing Co., Ltd (WJY Bearing) — a trusted name in precision rolling bearings. This guide covers 8 types of single row cylindrical roller bearings with detailed rib configurations, axial load capacities, and real-world applications. Browse all single row series →
Single row cylindrical roller bearings offer high radial load capacity and low friction, making them ideal for high-speed applications. The key difference lies in the rib design on inner/outer rings, which determines axial load handling and shaft displacement behavior. Below we break down eight standard types — N, NU, NJ, NF, NUP, NFP, RN, RNU — with direct links to each product series.
| Type | Inner Ring Ribs | Outer Ring Ribs | Axial Load | Typical Use |
|---|---|---|---|---|
| N | Both sides | None | Bidirectional displacement | High speed, electric motors |
| NU | None | Both sides | Bidirectional displacement | Conveyors, gearboxes |
| NJ | One side (fixed) | Both sides | Unidirectional | Mining, vibratory screens |
| NF | Both sides | One side | Unidirectional | Machine tools, robotics |
| NUP | One fixed + separable retainer | Both sides | Bidirectional (limited) | Gearboxes, marine |
| NFP | Both sides | One fixed + separable retainer | Limited bidirectional | Steel mills, high temp |
| RN | Double ribs | No outer ring | Radial only | Compact spindles |
| RNU | No inner ring | Double ribs | Radial only | Lightweight machinery |
1. N-Type Cylindrical Roller Bearings View N Series →
- Ribs: Outer ring – no ribs; Inner ring – ribs both sides.
- Axial capacity: Allows bidirectional shaft displacement relative to housing.
- Advantage: Optimized for high speed; low friction for energy efficiency.
- Applications: Precision machinery, pumps, fans, electric motors.
2. NU-Type Cylindrical Roller Bearings View NU Series →
- Ribs: Outer ring – both sides; Inner ring – no ribs.
- Axial capacity: Supports bidirectional displacement.
- Advantage: Enhanced load distribution; separable inner ring for easy installation.
- Applications: Automotive transmissions, conveyor rollers.
3. NJ-Type Cylindrical Roller Bearings View NJ Series →
- Ribs: Outer ring – both sides; Inner ring – one fixed rib + separable retainer.
- Axial capacity: Withstands unidirectional axial load.
- Advantage: Stable under vibration; cost-effective for directional loads.
- Applications: Mining equipment, agricultural machinery.
4. NF-Type Cylindrical Roller Bearings
- Ribs: Outer ring – one side; Inner ring – both sides.
- Axial capacity: Unidirectional axial load.
- Advantage: Compact design, high rigidity for precision tools.
- Applications: Machine tools, robotics.
5. NUP-Type Cylindrical Roller Bearings View NUP Series →
- Ribs: Outer ring – both sides; Inner ring – fixed rib + separable flat retainer.
- Axial capacity: Bidirectional displacement with locking mechanism.
- Advantage: Combines radial and light bidirectional axial loads.
- Applications: Gearboxes, marine propulsion, adjustable speed drives.
6. NFP-Type Cylindrical Roller Bearings
- Ribs: Outer ring – fixed rib + separable retainer; Inner ring – both sides.
- Axial capacity: Limited bidirectional axial movement.
- Advantage: Easy maintenance, high-temperature resistance.
- Applications: Steel mills, foundries, continuous operation environments.
7. RN-Type Cylindrical Roller Bearings
- Ribs: No outer ring; Inner ring with double ribs.
- Axial capacity: Radial loads only.
- Advantage: Extremely compact, optimized heat dissipation.
- Applications: Electric motors, high-speed spindles.
8. RNU-Type Cylindrical Roller Bearings
- Ribs: No inner ring; Outer ring with double ribs.
- Axial capacity: Radial load focused.
- Advantage: Reduced weight, extended lifespan in high-cycle applications.
- Applications: Aerospace components, robotics.
Conclusion: Matching Bearing Types to Your Application
Selecting the right cylindrical roller bearing depends on rib configuration, axial load requirements, and space constraints. At WJY Bearing (Wafangdian JinYu Bearing Manufacturing Co., Ltd), we manufacture and supply all eight types — N, NU, NJ, NF, NUP, NFP, RN, RNU — with customized options available.
Need help choosing? Contact WJY Bearing Engineers or explore our full single row collection.