1280/20

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

Bore d22.225 mmOutside diameter D57.15 mmOverall width T22.225 mmDynamic rating Cr65.8 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

Inch family

Designation: 1280/20
Family: Inch Tapered Roller Bearings
Bore d: 22.225 mm
Outside diameter D: 57.15 mm
Overall width T: 22.225 mm
Inner ring width B: 22.225 mm
Minimum corner radius r: 0.8 mm
Minimum corner radius r1: 1.6 mm
Dynamic load rating Cr: 65.8 kN
Static load rating C0r: 55.7 kN
Fatigue load limit Cu: 8.05 kN
Grease limiting speed: 7,600 rpm
Published row text: 1280/20 | 22.225 | 57.15 | 22.225 | 22.225 | 0.8 | 1.6 | 65.8 | 55.7 | 8.05 | 7600

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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