66.675 mm bore bearings
13 models with a 66.675 mm (2.625 in) bore across 1 bearing type, outside diameters from 103.213 to 136.525 mm. Tables are grouped by type; open a model for full specs and equivalents.
13 models 103.213–136.525 mm OD range 1 brand
| Model | Series | d (mm) | D (mm) | B (mm) | Brand | Seal | Clearance | C (kN) |
|---|---|---|---|---|---|---|---|---|
| L812148-L812111 | 4t-inch | 66.675 | 103.213 | 17.602 | NTN | open | CN | 66.5 |
| 29590-29520 | 4t-inch | 66.675 | 107.95 | 25.4 | NTN | open | CN | 101 |
| 395A-394A-NTN | 4t-inch | 66.675 | 110 | 22 | NTN | open | CN | 99.5 |
| 39590-39520-NTN | 4t-inch | 66.675 | 112.712 | 30.162 | NTN | open | CN | 153 |
| 3984-3925 | 4t-inch | 66.675 | 112.712 | 30.162 | NTN | open | CN | 132 |
| 3994-3920 | 4t-inch | 66.675 | 112.712 | 30.162 | NTN | open | CN | 132 |
| HM212049-HM212010 | 4t-inch | 66.675 | 122.238 | 38.1 | NTN | open | CN | 208 |
| 560-552A | 4t-inch | 66.675 | 123.825 | 38.1 | NTN | open | CN | 175 |
| HM813844-HM813810 | 4t-inch | 66.675 | 127 | 36.512 | NTN | open | CN | 181 |
| 641-633 | 4t-inch | 66.675 | 130.175 | 41.275 | NTN | open | CN | 215 |
| 6386-6320 | 4t-inch | 66.675 | 135.755 | 53.975 | NTN | open | CN | 310 |
| 641-632 | 4t-inch | 66.675 | 136.525 | 41.275 | NTN | open | CN | 215 |
| H414242-H414210 | 4t-inch | 66.675 | 136.525 | 41.275 | NTN | open | CN | 251 |
Exact-dimension interchange groups at 66.675 mm bore
These d×D×B envelopes at a 66.675 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:
Selecting a 66.675 mm bore bearing
The bore fixes the shaft, not the bearing capacity. At 66.675 mm the catalog spans 103.213–136.525 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 66.675 mm bore?
This index lists 13 verified bearing models with a 66.675 mm (2.625 in) bore across 1 bearing type, from 103.213 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 103.213–136.525 mm OD options for a 66.675 mm shaft?
On a fixed 66.675 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 66.675 mm bearings?
A 66.675 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.