NJ318
Tier-one manufacturer — brand supplied may vary ✓ Dimensions checked: ISO table and supplier data agreeCouldn't load pickup availability
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What NJ318 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) |
18 |
Bore | Bore code 18 × 5 = 90 mm |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
NJ318 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 90 mm | 3.5433 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 190 mm | 7.4803 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 43 mm | 1.6929 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
Also listed in manufacturer interchange tables (1): confirm suffix codes before ordering
- TIMKEN NJ318GICE (Timken Interchange Guide)
These carry maker-specific suffix codes (cage, lubrication groove, design) that we have not matched one-for-one. The size is the same; check the codes against your application.
Equivalents are dimensional and closure-for-closure: same bore, outside diameter, width, seals or shields and internal clearance. Bearing interchange tables
NJ318 is a cylindrical roller bearing, 90 mm bore × 190 mm OD × 43 mm wide (3.5433 × 7.4803 × 1.6929 in).
The NJ318 is a cylindrical roller bearing with a 90mm bore diameter, 190mm outside diameter, and 43mm width. This single-row bearing design features high radial load capacity and allows axial displacement of the shaft relative to the housing, accommodating thermal expansion in machinery.
