NJ308-C4
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What NJ308-C4 means
| Code | Position | Meaning |
|---|---|---|
NJ |
Type | Cylindrical roller bearing, type NJ: two flanges on the outer ring, one on the inner ring (locates in one direction) |
3 |
Diameter series | Diameter series 3 (medium) |
08 |
Bore | Bore code 08 × 5 = 40 mm |
C4 |
Internal clearance | C4: radial internal clearance greater than C3 |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
NJ308-C4 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 40 mm | 1.5748 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 90 mm | 3.5433 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 23 mm | 0.9055 in | ISO table for this designation, confirmed by supplier data |
| Bearing type | Cylindrical roller bearing | Stated by the designation | |
| Seals / shields | Open (no seals or shields) | Stated by the designation | |
| Internal clearance | C4 (greater than C3) | Stated by the designation | |
| Tolerance class | Normal (ISO P0 / ABEC 1): no tolerance-class code | Stated by the designation | |
NJ308-C4 is a cylindrical roller bearing, 40 mm bore × 90 mm OD × 23 mm wide (1.5748 × 3.5433 × 0.9055 in). It has C4 internal clearance.
The NJ308-C4 is a single-row cylindrical roller bearing with a 40mm bore diameter, 90mm outside diameter, and 23mm width. This NJ-type bearing features a two-rib outer ring design with one rib on the inner ring, allowing axial displacement of the shaft relative to the housing. The C4 designation indicates a radial internal clearance greater than C3, suitable for applications with thermal expansion or shaft deflection.
