71.438 mm bore bearings
8 models with a 71.438 mm (2.813 in) bore across 1 bearing type, outside diameters from 117.475 to 136.525 mm. Tables are grouped by type; open a model for full specs and equivalents.
8 models 117.475–136.525 mm OD range 2 brands
| Model | Series | d (mm) | D (mm) | B (mm) | Brand | Seal | Clearance | C (kN) |
|---|---|---|---|---|---|---|---|---|
| 33281-33462 | 33000 | 71.438 | 117.475 | 30.162 | SKF | open | CN | 152 |
| 33281-33462-NTN | 4t-inch | 71.438 | 117.475 | 30.162 | NTN | open | CN | 129 |
| 47490-47420 | 4t-inch | 71.438 | 120 | 32.545 | NTN | open | CN | 163 |
| 567A-563 | 4t-inch | 71.438 | 127 | 36.512 | NTN | open | CN | 181 |
| 644-632 | 4t-inch | 71.438 | 136.525 | 41.275 | NTN | open | CN | 215 |
| H414249-H414210 | 4t-inch | 71.438 | 136.525 | 41.275 | NTN | open | CN | 251 |
| H715345-311 | H715300 | 71.438 | 136.525 | 46.038 | SKF | open | CN | 273 |
| H715345-H715311 | 4t-inch | 71.438 | 136.525 | 46.038 | NTN | open | CN | 248 |
Selecting a 71.438 mm bore bearing
The bore fixes the shaft, not the bearing capacity. At 71.438 mm the catalog spans 117.475–136.525 mm outside diameter: the light sections suit compact housings and moderate duty, while the larger ODs use bigger rolling elements and carry substantially more load. Select first by the required dynamic load rating C for the calculated L10 life, then by available radial space.
For a rotating inner ring a k5 shaft seat with an H7 housing is the usual starting point; an interference fit plus thermal growth consumes internal clearance, so C3 is the common industrial default rather than CN. Sealed variants (-2RS, -ZZ) trade a small amount of speed for contamination protection and maintenance-free operation — compare the sealed and open versions of the same envelope before substituting one for the other.
Frequently asked questions
What bearings have a 71.438 mm bore?
This index lists 8 verified bearing models with a 71.438 mm (2.813 in) bore across 1 bearing type, from 117.475 to 136.525 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.
How do I choose between the 117.475–136.525 mm OD options for a 71.438 mm shaft?
On a fixed 71.438 mm bore, a smaller outside diameter means a lighter section for limited housing space and moderate load; a larger OD with a wider ring carries more radial and axial load and lasts longer at the same duty. Compare the C dynamic load rating in each model table, then match seal type, internal clearance (CN/C3/C4) and precision class to the actual mounting and operating temperature.
What shaft fit and bore code apply to 71.438 mm bearings?
A 71.438 mm bore on a rotating inner ring normally uses a k5 shaft seat with an H7 housing bore (verify against the catalogue for heavy or stationary-ring duty). Bore diameters below 20 mm follow the 10/12/15/17 mm exception table rather than code × 5.