JTEKT/Koyo DB matched pair · live catalog page 4
7211DB
Manufacturer-published matched-pair dimensions, load ratings, fatigue limit, and limiting speed.
Live manufacturer specification row
Published specifications
- Designation
- 7211DB
- Arrangement
- Back-to-back matched pair (DB)
- Bore d
- 55 mm
- Outside diameter D
- 100 mm
- Pair width B
- 42 mm
- Minimum corner radius r
- 1.5 mm
- Minimum corner radius r1
- 1 mm
- Dynamic load rating Cr
- 104 kN
- Static load rating C0r
- 79.6 kN
- Fatigue load limit Cu
- 4.9 kN
- Factor f0
- Not published
- Grease limiting speed
- 4,800 rpm
- Published row text
- 7211DB | 55 | 100 | 42 | 1.5 | 1 | 104 | 79.6 | 4.9 | - | 4800
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 pair7211BDBD 100 mm · pair width 42 mmDB matched pair7211CDBD 100 mm · pair width 42 mmDB matched pair7311BDBD 120 mm · pair width 58 mmDB matched pair7311DBD 120 mm · pair width 58 mmDB matched pair7311CDBD 120 mm · pair width 58 mmDB matched pair7911CDB FYD 80 mm · pair width 26 mmDB matched pair7011BDB FYD 90 mm · pair width 36 mmDB matched pair7011DB FYD 90 mm · pair width 36 mm