30304 (Tapered Roller bearing)
The 30304 is a Tapered Roller bearing with boundary dimensions of 20 x 52 x 16.25 mm (bore x outside diameter x width). It has a basic dynamic load rating of 35.2 kN and a basic static load rating of 36 kN.
Cross-Reference
| Manufacturer | Reference |
|---|---|
| SKF | 30304 |
| Timken | 30304 |
| FAG (Schaeffler) | 30304 |
Cross-references are matched on the ISO 15 boundary dimensions
(20 x 52 x 16.25 mm) and bearing type, which is what makes parts interchangeable. The
suffixes (e.g. -2RS, -2Z, -E1) encode seals, shields, and internal design
variants, not the envelope size.
Boundary Dimensions
| Dimension | Value |
|---|---|
| Bore (d) | 20 mm |
| Outside diameter (D) | 52 mm |
| Width (B/T) | 16.25 mm |
Load Ratings
| Rating | Value |
|---|---|
| Basic dynamic load rating (C) | 35.2 kN |
| Basic static load rating (C0) | 36 kN |
Type & Application Notes
Tapered Roller bearings are handles combined radial and axial loads through a tapered raceway, common in wheel and gearbox hubs. The 30304 is commonly found in wheel hubs, automotive differentials, and axle gearboxes. Dynamic rating 35.2 kN sets the load a bearing can carry for a one-million-revolution rating life (L10), while the static rating 36 kN governs the maximum load a stationary bearing can withstand without permanent deformation.
Interchange Notes
When substituting the 30304:
- Match the boundary dimensions (20 x 52 x 16.25 mm) exactly — this is what guarantees fit.
- Match the bearing type (Tapered Roller); mixing roller and ball types changes stiffness, speed limits, and load capacity.
- Match or exceed the dynamic load rating (35.2 kN) for the intended life.
- Respect the seal/shield suffix the application requires (open, Z, 2Z, RS, or 2RS).
Frequently Asked Questions
What Timken bearing crosses to SKF 30304?
The Timken equivalent is 30304.
What FAG bearing crosses to SKF 30304?
The FAG (Schaeffler) equivalent is 30304.
What are the dimensions of the 30304 bearing?
20 x 52 x 16.25 mm (bore x OD x width).
What is the load rating of the 30304 bearing?
Dynamic 35.2 kN, static 36 kN.
What type of bearing is the 30304?
It is a Tapered Roller bearing.