18590/20

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

Bore d41.275 mmOutside diameter D73.025 mmOverall width T16.667 mmDynamic rating Cr57.6 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

Inch family

Designation: 18590/20
Family: Inch Tapered Roller Bearings
Bore d: 41.275 mm
Outside diameter D: 73.025 mm
Overall width T: 16.667 mm
Inner ring width B: 17.462 mm
Minimum corner radius r: 3.6 mm
Minimum corner radius r1: 1.6 mm
Dynamic load rating Cr: 57.6 kN
Static load rating C0r: 55.8 kN
Fatigue load limit Cu: 8.15 kN
Grease limiting speed: 5,200 rpm
Published row text: 18590/20 | 41.275 | 73.025 | 16.667 | 17.462 | 3.6 | 1.6 | 57.6 | 55.8 | 8.15 | 5200

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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