Overview
The SKF NJ308 ECJ /C3 is a single-row cylindrical roller bearing engineered for demanding industrial applications. With a bore diameter of 40 mm, outer diameter of 90 mm, and width of 23 mm, this bearing is manufactured to SKF’s precision standards and delivers reliable performance in high-speed, high-load environments. The NJ design accommodates heavy radial loads while maintaining low friction and reduced noise levels.
Key Features
- NJ Design with Flanges: Two integral flanges on the outer ring and one on the inner ring allow the bearing to accommodate axial displacement in one direction
- Steel Cage: Robust steel cage ensures stability during high-speed operation
- High Radial Load Capacity: Cylindrical roller design optimizes load distribution for heavy radial loads
- Low Noise and Vibration: Engineered for smooth rotation in dynamic industrial environments
- Made in Germany: Manufactured by SKF to ISO standards for durability and consistency
Technical Specifications
- Bore Diameter (Inner): 40 mm
- Outside Diameter (Outer): 90 mm
- Width (Height): 23 mm
- Bearing Type: Single-row cylindrical roller bearing, NJ design
- Cage Type: Steel cage
- Clearance: C3 (greater than normal radial internal clearance)
- Manufacturer: SKF (Sweden/Germany)
- Standards: ISO 281, DIN 625
Typical Applications
The SKF NJ308 ECJ /C3 is widely used in:
- Industrial pumps and compressors
- Electric motors and generators
- Gearboxes and speed reducers
- Manufacturing machinery and production equipment
- Conveyor systems and material handling
- Heavy equipment and construction machinery
Compatibility & Replacements
Compatible With
- Standard bearing housings and pedestals designed for 40 mm bore diameter shafts
- ISO standard mounted arrangements
- Industrial equipment requiring NJ-type cylindrical roller bearings
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering. NJ308 variants with different cage types (ECP, ECM, ECML) may not be direct substitutes without confirming load and speed ratings.
Works With
- SKF lubrication systems (grease and oil)
- Standard bearing seals and shields
- ISO-standard shaft and housing tolerances
