12175/303

Manufacturer-published tapered-roller dimensions, load ratings, fatigue load limit, and limiting speed.

Bore d44.45 mmOutside diameter D76.992 mmOverall width T17.463 mmDynamic rating Cr60.8 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

Inch family

Designation: 12175/303
Family: Inch Tapered Roller Bearings
Bore d: 44.45 mm
Outside diameter D: 76.992 mm
Overall width T: 17.463 mm
Inner ring width B: 17.145 mm
Minimum corner radius r: 1.6 mm
Minimum corner radius r1: 1.6 mm
Dynamic load rating Cr: 60.8 kN
Static load rating C0r: 62.2 kN
Fatigue load limit Cu: 8.95 kN
Grease limiting speed: 5,000 rpm
Published row text: 12175/303 | 44.45 | 76.992 | 17.463 | 17.145 | 1.6 | 1.6 | 60.8 | 62.2 | 8.95 | 5000

Verification boundary

Do not infer interchange

Exact set architectureConfirm metric versus inch family, cone/cup identity, series, and complete designation.

Fits and geometryVerify shaft/housing seats, shoulders, fillets, preload/endplay, and mounting arrangement.

DutyCheck combined radial/axial loading, lubrication, speed, temperature, contamination, and required life.

Current manufacturer dataUse the linked JTEKT/Koyo calculation and CAD tools before ordering.

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