30312JR

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

Bore d60 mmOutside diameter D130 mmOverall width T33.5 mmDynamic rating Cr217 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

Metric family

Designation: 30312JR
Family: Metric Tapered Roller Bearings
Bore d: 60 mm
Outside diameter D: 130 mm
Overall width T: 33.5 mm
Inner ring width B: 31 mm
Minimum corner radius r: 3 mm
Minimum corner radius r1: 2.5 mm
Dynamic load rating Cr: 217 kN
Static load rating C0r: 201 kN
Fatigue load limit Cu: 31.9 kN
Grease limiting speed: 3,100 rpm
Published row text: 30312JR | 60 | 130 | 33.5 | 31 | 3 | 2.5 | 217 | 201 | 31.9 | 3100

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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