6903 2RS

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

Bore d17 mmOutside diameter D30 mmWidth B7 mmDynamic rating Cr5.75 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

JTEKT/Koyo

Designation: 6903 2RS
Classification: Contact sealed 2RS
Bore d: 17 mm
Outside diameter D: 30 mm
Width B: 7 mm
Minimum corner radius r: 0.3 mm
Basic dynamic load rating Cr: 5.75 kN
Basic static load rating C0r: 2.55 kN
Fatigue load limit Cu: 0.13 kN
Factor f0: 14.7
Published row text: 6903 2RS | 17 | 30 | 7 | 0.3 | 5.75 | 2.55 | 0.13 | 14.7

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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