525/522

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

Bore d38.1 mmOutside diameter D101.6 mmOverall width T34.925 mmDynamic rating Cr164 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

Inch family

Designation: 525/522
Family: Inch Tapered Roller Bearings
Bore d: 38.1 mm
Outside diameter D: 101.6 mm
Overall width T: 34.925 mm
Inner ring width B: 36.068 mm
Minimum corner radius r: 3.6 mm
Minimum corner radius r1: 3.2 mm
Dynamic load rating Cr: 164 kN
Static load rating C0r: 159 kN
Fatigue load limit Cu: 24.8 kN
Grease limiting speed: 4,000 rpm
Published row text: 525/522 | 38.1 | 101.6 | 34.925 | 36.068 | 3.6 | 3.2 | 164 | 159 | 24.8 | 4000

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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