HM88542/12

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

Bore d31.75 mmOutside diameter D73.812 mmOverall width T29.37 mmDynamic rating Cr93 kNKoyo calculation tool ↗

Live manufacturer specification row

Published specifications

Inch family

Designation: HM88542/12
Family: Inch Tapered Roller Bearings
Bore d: 31.75 mm
Outside diameter D: 73.812 mm
Overall width T: 29.37 mm
Inner ring width B: 27.783 mm
Minimum corner radius r: 1.2 mm
Minimum corner radius r1: 3.2 mm
Dynamic load rating Cr: 93 kN
Static load rating C0r: 101 kN
Fatigue load limit Cu: 14.2 kN
Grease limiting speed: 5,600 rpm
Published row text: HM88542/12 | 31.75 | 73.812 | 29.37 | 27.783 | 1.2 | 3.2 | 93 | 101 | 14.2 | 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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