25877R/21

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

Bore d34.925 mmOutside diameter D73.025 mmOverall width T23.812 mmDynamic rating Cr90.1 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

Inch family

Designation: 25877R/21
Family: Inch Tapered Roller Bearings
Bore d: 34.925 mm
Outside diameter D: 73.025 mm
Overall width T: 23.812 mm
Inner ring width B: 24.608 mm
Minimum corner radius r: 1.6 mm
Minimum corner radius r1: 0.8 mm
Dynamic load rating Cr: 90.1 kN
Static load rating C0r: 87.3 kN
Fatigue load limit Cu: 13.1 kN
Grease limiting speed: 5,600 rpm
Published row text: 25877R/21 | 34.925 | 73.025 | 23.812 | 24.608 | 1.6 | 0.8 | 90.1 | 87.3 | 13.1 | 5600

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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