JTEKT/Koyo Metric Tapered Roller Bearings · live catalog page 1
30304AJR
Manufacturer-published tapered-roller dimensions, load ratings, fatigue load limit, and limiting speed.
Bore d20 mmOutside diameter D52 mmOverall width T16.25 mmDynamic rating Cr45.3 kNKoyo calculation tool ↗
Live manufacturer specification row
Published specifications
- Designation
- 30304AJR
- Family
- Metric Tapered Roller Bearings
- Bore d
- 20 mm
- Outside diameter D
- 52 mm
- Overall width T
- 16.25 mm
- Inner ring width B
- 16 mm
- Minimum corner radius r
- 1.5 mm
- Minimum corner radius r1
- 1.5 mm
- Dynamic load rating Cr
- 45.3 kN
- Static load rating C0r
- 35.1 kN
- Fatigue load limit Cu
- 5.05 kN
- Grease limiting speed
- 8,300 rpm
- Published row text
- 30304AJR | 20 | 52 | 16.25 | 16 | 1.5 | 1.5 | 45.3 | 35.1 | 5.05 | 8300
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 Bearings32004JRD 42 mm · T 15 mmMetric Tapered Roller Bearings57008RD 47 mm · T 15.25 mmMetric Tapered Roller Bearings30204JRD 47 mm · T 15.25 mmMetric Tapered Roller Bearings32204JRD 47 mm · T 19.25 mmMetric Tapered Roller Bearings32204XRD 47 mm · T 19.25 mmMetric Tapered Roller Bearings30304ACD 52 mm · T 16.25 mmMetric Tapered Roller Bearings32304CRD 52 mm · T 22.25 mmMetric Tapered Roller Bearings32304JRD 52 mm · T 22.25 mm