JTEKT/Koyo DB matched pair · live catalog page 4
7409DB
Manufacturer-published matched-pair dimensions, load ratings, fatigue limit, and limiting speed.
Live manufacturer specification row
Published specifications
- Designation
- 7409DB
- Arrangement
- Back-to-back matched pair (DB)
- Bore d
- 45 mm
- Outside diameter D
- 120 mm
- Pair width B
- 58 mm
- Minimum corner radius r
- 2 mm
- Minimum corner radius r1
- 1 mm
- Dynamic load rating Cr
- 185 kN
- Static load rating C0r
- 120 kN
- Fatigue load limit Cu
- 9.3 kN
- Factor f0
- Not published
- Grease limiting speed
- 3,300 rpm
- Published row text
- 7409DB | 45 | 120 | 58 | 2 | 1 | 185 | 120 | 9.3 | - | 3300
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 pair7209BDBD 85 mm · pair width 38 mmDB matched pair7209DBD 85 mm · pair width 38 mmDB matched pair7209CDBD 85 mm · pair width 38 mmDB matched pair7309BDBD 100 mm · pair width 50 mmDB matched pair7309DBD 100 mm · pair width 50 mmDB matched pair7309CDBD 100 mm · pair width 50 mmDB matched pair7409BDBD 120 mm · pair width 58 mmDB matched pair7909CDB FYD 68 mm · pair width 24 mm