JTEKT/Koyo Metric Tapered Roller Bearings · live catalog page 1
30203JR
Manufacturer-published tapered-roller dimensions, load ratings, fatigue load limit, and limiting speed.
Bore d17 mmOutside diameter D40 mmOverall width T13.25 mmDynamic rating Cr26 kNKoyo calculation tool ↗
Live manufacturer specification row
Published specifications
- Designation
- 30203JR
- Family
- Metric Tapered Roller Bearings
- Bore d
- 17 mm
- Outside diameter D
- 40 mm
- Overall width T
- 13.25 mm
- Inner ring width B
- 12 mm
- Minimum corner radius r
- 1 mm
- Minimum corner radius r1
- 1 mm
- Dynamic load rating Cr
- 26 kN
- Static load rating C0r
- 20.7 kN
- Fatigue load limit Cu
- 2.85 kN
- Grease limiting speed
- 10,000 rpm
- Published row text
- 30203JR | 17 | 40 | 13.25 | 12 | 1 | 1 | 26 | 20.7 | 2.85 | 10000
Verification boundary
What still needs to match
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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