1380/28

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

Bore d22.225 mmOutside diameter D52.388 mmOverall width T19.368 mmDynamic rating Cr45.9 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

Inch family

Designation: 1380/28
Family: Inch Tapered Roller Bearings
Bore d: 22.225 mm
Outside diameter D: 52.388 mm
Overall width T: 19.368 mm
Inner ring width B: 20.168 mm
Minimum corner radius r: 1.6 mm
Minimum corner radius r1: 1.6 mm
Dynamic load rating Cr: 45.9 kN
Static load rating C0r: 37.9 kN
Fatigue load limit Cu: 5.45 kN
Grease limiting speed: 8,000 rpm
Published row text: 1380/28 | 22.225 | 52.388 | 19.368 | 20.168 | 1.6 | 1.6 | 45.9 | 37.9 | 5.45 | 8000

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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