6304 2RD

Manufacturer-published boundary dimensions, basic load ratings, fatigue limit, and f0 factor.

Bore d20 mmOutside diameter D52 mmWidth B15 mmDynamic rating Cr19.9 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

JTEKT/Koyo

Designation: 6304 2RD
Classification: Extremely light contact sealed
Bore d: 20 mm
Outside diameter D: 52 mm
Width B: 15 mm
Minimum corner radius r: 1.1 mm
Basic dynamic load rating Cr: 19.9 kN
Basic static load rating C0r: 7.85 kN
Fatigue load limit Cu: 0.66 kN
Factor f0: 12.3
Published row text: 6304 2RD | 20 | 52 | 15 | 1.1 | 19.9 | 7.85 | 0.66 | 12.3

Verification boundary

Do not infer interchange

Designation and sealingConfirm the complete bearing number and exact shield/seal construction.

Fit and geometryVerify shaft/housing fits, shoulders, fillets, internal clearance, and installation constraints.

DutyCheck speed, temperature, lubrication, contamination, load direction, and required life.

Current manufacturer dataUse the linked JTEKT/Koyo calculation tool and current catalog before ordering.

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