NJ306-C4
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What NJ306-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) |
06 |
Bore | Bore code 06 × 5 = 30 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.
NJ306-C4 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 30 mm | 1.1811 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 72 mm | 2.8346 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 19 mm | 0.748 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 | |
NJ306-C4 is a cylindrical roller bearing, 30 mm bore × 72 mm OD × 19 mm wide (1.1811 × 2.8346 × 0.748 in). It has C4 internal clearance.
The NJ306-C4 is a single-row cylindrical roller bearing with a 30mm bore diameter, 72mm outside diameter, and 19mm width. This NJ-type bearing features a removable inner ring with integral flanges on the outer ring, allowing for axial displacement of the shaft relative to the housing. The C4 radial clearance provides greater internal clearance than standard, making it suitable for applications with thermal expansion or misalignment considerations.
