320/28JR

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

Bore d28 mmOutside diameter D52 mmOverall width T16 mmDynamic rating Cr44.1 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

Metric family

Designation: 320/28JR
Family: Metric Tapered Roller Bearings
Bore d: 28 mm
Outside diameter D: 52 mm
Overall width T: 16 mm
Inner ring width B: 16 mm
Minimum corner radius r: 1 mm
Minimum corner radius r1: 1 mm
Dynamic load rating Cr: 44.1 kN
Static load rating C0r: 44 kN
Fatigue load limit Cu: 6.1 kN
Grease limiting speed: 7,500 rpm
Published row text: 320/28JR | 28 | 52 | 16 | 16 | 1 | 1 | 44.1 | 44 | 6.1 | 7500

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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