JTEKT/Koyo DB matched pair · live catalog page 3
7308BDB
Manufacturer-published matched-pair dimensions, load ratings, fatigue limit, and limiting speed.
Live manufacturer specification row
Published specifications
- Designation
- 7308BDB
- Arrangement
- Back-to-back matched pair (DB)
- Bore d
- 40 mm
- Outside diameter D
- 90 mm
- Pair width B
- 46 mm
- Minimum corner radius r
- 1.5 mm
- Minimum corner radius r1
- 1 mm
- Dynamic load rating Cr
- 91 kN
- Static load rating C0r
- 60.6 kN
- Fatigue load limit Cu
- 3.95 kN
- Factor f0
- Not published
- Grease limiting speed
- 4,400 rpm
- Published row text
- 7308BDB | 40 | 90 | 46 | 1.5 | 1 | 91 | 60.6 | 3.95 | - | 4400
Verification boundary
What still needs to match
Arrangement and contact angleConfirm DB arrangement, contact angle, precision, preload, and complete suffix.
Fits and geometryVerify shaft/housing seats, shoulders, fillets, spacers, and axial clamping.
DutyCheck combined radial/axial load, stiffness, speed, lubrication, temperature, and required life.
Current dataUse the linked JTEKT/Koyo calculation and CAD tools before ordering.
Related Koyo DB pairs
Same bore dimension
DB matched pair7208BDBD 80 mm · pair width 36 mmDB matched pair7208DBD 80 mm · pair width 36 mmDB matched pair7208CDBD 80 mm · pair width 36 mmDB matched pair7308DBD 90 mm · pair width 46 mmDB matched pair7308CDBD 90 mm · pair width 46 mmDB matched pair7408BDBD 110 mm · pair width 54 mmDB matched pair7408DBD 110 mm · pair width 54 mmDB matched pair7908CDB FYD 62 mm · pair width 24 mm