The NU308ECJ is a specific type of cylindrical roller bearing. Here’s a breakdown of its designation and key features:
1. NU Design:
- NU indicates the type of cylindrical roller bearing. In this case:
- NU means the bearing has two flanges on the outer ring and no flanges on the inner ring. This design allows the inner ring to move axially relative to the outer ring, making it suitable for applications where axial displacement needs to be accommodated.
2. 308:
- 308 is the size designation:
- 3 indicates the series (medium duty).
- 08 indicates the bore diameter. For metric bearings, the bore diameter is calculated as 08 × 5 = 40 mm.
3. ECJ:
- ECJ refers to the internal design and material:
- EC: Stands for “Optimized Internal Design.” This means the bearing has a higher load-carrying capacity due to improved roller and raceway profiles.
- J: Indicates the material of the cage (guide ring). In this case, J typically refers to a pressed steel cage.
Key Features:
- High Radial Load Capacity: Cylindrical roller bearings are designed to handle high radial loads.
- Axial Displacement: The NU design allows for axial displacement of the shaft relative to the housing.
- Optimized Internal Design (EC): Provides higher load capacity and better performance under heavy loads.
- Steel Cage (J): The pressed steel cage is robust and suitable for high-speed applications.
Applications:
Cylindrical roller bearings like the NU308ECJ are commonly used in:
- Electric motors
- Gearboxes
- Industrial machinery
- Pumps
- Compressors
Telē (Typical for NU308):
- Bore Diameter (d): 40 mm
- Outer Diameter (D): 90 mm
- Lautele (B): 23 mm
If you need further details, such as load ratings or specific performance data, consult the manufacturer’s datasheet or catalog.
