JTEKT/Koyo Metric Tapered Roller Bearings · live catalog page 8
30311DJR
Manufacturer-published tapered-roller dimensions, load ratings, fatigue load limit, and limiting speed.
Bore d55 mmOutside diameter D120 mmOverall width T31.5 mmDynamic rating Cr161 kNKoyo calculation tool ↗
Live manufacturer specification row
Published specifications
- Designation
- 30311DJR
- Family
- Metric Tapered Roller Bearings
- Bore d
- 55 mm
- Outside diameter D
- 120 mm
- Overall width T
- 31.5 mm
- Inner ring width B
- 29 mm
- Minimum corner radius r
- 2.5 mm
- Minimum corner radius r1
- 2 mm
- Dynamic load rating Cr
- 161 kN
- Static load rating C0r
- 148 kN
- Fatigue load limit Cu
- 22.3 kN
- Grease limiting speed
- 2,900 rpm
- Published row text
- 30311DJR | 55 | 120 | 31.5 | 29 | 2.5 | 2 | 161 | 148 | 22.3 | 2900
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.
Related Koyo bearings
Same family and bore
Metric Tapered Roller Bearings32911JRD 80 mm · T 17 mmMetric Tapered Roller Bearings32011JRD 90 mm · T 23 mmMetric Tapered Roller Bearings33011JRD 90 mm · T 27 mmMetric Tapered Roller Bearings33111JRD 95 mm · T 30 mmMetric Tapered Roller Bearings30211CRD 100 mm · T 22.75 mmMetric Tapered Roller Bearings30211JRD 100 mm · T 22.75 mmMetric Tapered Roller Bearings32211CRD 100 mm · T 26.75 mmMetric Tapered Roller Bearings32211JR-1D 100 mm · T 26.75 mm