30302 Bearing — Cross-Reference & Equivalents
The 30302 is a tapered roller bearing with ISO 355 boundary dimensions 15×42×14.25 mm. The table below lists how 8 major brands designate it, with catalog links and interchange notes.
Specifications
| Bore (d) | 15 mm |
|---|---|
| Outer Diameter (D) | 42 mm |
| Overall Width (T) | 14.25 mm |
| Type | Tapered Roller Bearing |
| Standard | ISO 355 |
Cross-Reference by Brand
| Brand | Part No. | Boundary dims | Catalog |
|---|---|---|---|
| SKF | 30302 | match | SKF catalog ↗ |
| NSK | 30302 | match | NSK catalog ↗ |
| FAG | 30302 | match | FAG catalog ↗ |
| NTN | 30302 | match | NTN catalog ↗ |
| KOYO | 30302 | match | KOYO catalog ↗ |
| NACHI | 30302 | match | NACHI catalog ↗ |
| Timken | 30302 | match | Timken catalog ↗ |
| INA | 30302 | match | INA catalog ↗ |
Interchange notes
All brands build this designation to the same ISO 355 boundary dimensions (d, D and overall width T), so the mounting envelope is interchangeable. For tapered roller bearings, though, matching dimensions is necessary but NOT sufficient — there are more interchange traps than for ball bearings: (1) Contact angle and the e / Y factors are not fully fixed by the boundary standard and differ by brand; they change the equivalent load and rated life, so read them from each maker's catalog. (2) The cup (outer ring) and cone (inner ring) are separable and often sold as separate part numbers (especially Timken) — do not mix cup and cone across brands. (3) These bearings are open (no seals); their axial preload/clearance is set at assembly with shims or a lock nut, not built in, so re-set it to the assembly spec after any swap. (4) Timken's inch TS series is a different system from the metric ISO 302xx/303xx — never infer interchange from the name. (5) Match precision class (P0/P6/P5). Load ratings (dynamic Cr, static C0r) are intentionally NOT listed here: they vary by brand and internal design and are a safety-critical selection parameter — read them directly from the manufacturer catalog linked in the table above.
FAQ
What bearings are equivalent to a 30302?
The 30302 is built to ISO 355 boundary dimensions 15×42×14.25 mm by SKF, NSK, FAG, NTN, KOYO, NACHI, Timken, INA. All share the same mounting envelope; match clearance, precision class and (where applicable) seal suffix before substituting.
What are the dimensions of a 30302 bearing?
Bore 15 mm, outer diameter 42 mm, T 14.25 mm (ISO 355).
Can I replace one brand's 30302 with another?
Dimensionally yes — all brands build the 30302 to ISO 355 (15×42×14.25 mm). Tapered roller bearings are open (no seals). The cup (outer ring) and cone (inner ring) are matched as an assembly; confirm contact angle subclass and precision class before substituting.
Related sizes
Boundary-dimension cross-reference only. Per the applicable ISO standard (ISO 15 for ball, ISO 355 for tapered), the boundary dimensions are common across brands, so the mounting envelope is interchangeable. This is NOT a drop-in part equivalence. Internal clearance, precision class, seal/shield type (where applicable), cage material and factory lubrication are encoded in brand-specific suffixes and must be matched separately. Always verify against the manufacturer's catalog before substituting.