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The 30305J is a metric tapered roller bearing conforming to ISO 355 standards, featuring a 25 mm bore diameter and belonging to the 303 series. Tapered roller bearings use conical rolling elements between inner and outer ring raceways to handle combined radial and axial loads.
These bearings are commonly used in automotive wheel hubs, gearboxes, differentials, and industrial machinery requiring high load capacity in both directions. The tapered geometry allows for adjustment of bearing clearance and accommodation of shaft misalignment.
Interchange / cross reference
Cross-references are provided as a guide — verify dimensions and fit for your application.
30305J
Bore/Inner Diameter Inch: 0.984
Bore/Inner Diameter mm: 25
For large orders ($2000+) please inquire by email.
