114.3 mm bore bearings
9 models with a 114.3 mm (4.500 in) bore across 1 bearing type, outside diameters from 177.8 to 228.6 mm. Tables are grouped by type; open a model for full specs and equivalents.
9 models 177.8–228.6 mm OD range 2 brands
| Model | Series | d (mm) | D (mm) | B (mm) | Brand | Seal | Clearance | C (kN) |
|---|---|---|---|---|---|---|---|---|
| 64450-64700 | 64000 | 114.3 | 177.8 | 41.275 | SKF | open | CN | 307 |
| 64450-64700-NTN | 4t-inch | 114.3 | 177.8 | 41.275 | NTN | open | CN | 257 |
| 68450-68712 | 68000 | 114.3 | 180.975 | 34.925 | SKF | open | CN | 227 |
| 68450-68712-NTN | 4t-inch | 114.3 | 180.975 | 34.925 | NTN | open | CN | 187 |
| 938-932 | 935 | 114.3 | 212.725 | 66.675 | SKF | open | CN | 626 |
| 938-932-NTN | 4t-inch | 114.3 | 212.725 | 66.675 | NTN | open | CN | 525 |
| HH224346-310 | HH224300 | 114.3 | 212.725 | 66.675 | SKF | open | CN | 619 |
| HH224346-HH224310 | 4t-inch | 114.3 | 212.725 | 66.675 | NTN | open | CN | 635 |
| HM926740-HM926710 | 4t-inch | 114.3 | 228.6 | 53.975 | NTN | open | CN | 475 |
Exact-dimension interchange groups at 114.3 mm bore
These d×D×B envelopes at a 114.3 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:
Selecting a 114.3 mm bore bearing
The bore fixes the shaft, not the bearing capacity. At 114.3 mm the catalog spans 177.8–228.6 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 m6 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 114.3 mm bore?
This index lists 9 verified bearing models with a 114.3 mm (4.500 in) bore across 1 bearing type, from 177.8 to 228.6 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.
How do I choose between the 177.8–228.6 mm OD options for a 114.3 mm shaft?
On a fixed 114.3 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 114.3 mm bearings?
A 114.3 mm bore on a rotating inner ring normally uses a m6 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.