NJ309
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What NJ309 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) |
09 |
Bore | Bore code 09 × 5 = 45 mm |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
NJ309 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 45 mm | 1.7717 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 100 mm | 3.937 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 25 mm | 0.9843 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 | Normal (CN): no clearance code in the designation | Stated by the designation | |
| Tolerance class | Normal (ISO P0 / ABEC 1): no tolerance-class code | Stated by the designation | |
Equivalent to / interchanges with
| Brand | Part number | Basis |
|---|---|---|
| TIMKEN | NJ309 | Timken Interchange Guide |
Equivalents are dimensional and closure-for-closure: same bore, outside diameter, width, seals or shields and internal clearance. Bearing interchange tables
NJ309 is a cylindrical roller bearing, 45 mm bore × 100 mm OD × 25 mm wide (1.7717 × 3.937 × 0.9843 in). Published interchange tables list it as equivalent to TIMKEN NJ309.
The NJ309 is a single-row cylindrical roller bearing with dimensions of 45mm bore, 100mm outside diameter, and 25mm width. This bearing design features high radial load capacity and allows axial displacement of the shaft relative to the housing, making it suitable for applications requiring accommodation of thermal expansion.
