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The 30309J is a metric tapered roller bearing conforming to ISO 355 standards, featuring a 45 mm bore diameter. Tapered roller bearings use conical raceways and tapered rollers to handle combined radial and axial loads efficiently.
This bearing type is commonly used in automotive wheel hubs, gearboxes, conveyor systems, and industrial machinery where both radial and thrust loads are present. The tapered geometry allows for precise load distribution and adjustability during installation.
Interchange / cross reference
Cross-references are provided as a guide — verify dimensions and fit for your application.
30309J
Bore/Inner Diameter Inch: 1.772
Bore/Inner Diameter mm: 45
Outside Diameter Inch: 3.937
Outside Diameter mm: 100
For large orders ($2000+) please inquire by email.
