88.9 mm bore bearings
10 models with a 88.9 mm (3.500 in) bore across 1 bearing type, outside diameters from 121.442 to 168.275 mm. Tables are grouped by type; open a model for full specs and equivalents.
10 models 121.442–168.275 mm OD range 2 brands
| Model | Series | d (mm) | D (mm) | B (mm) | Brand | Seal | Clearance | C (kN) |
|---|---|---|---|---|---|---|---|---|
| LL217849-LL217810 | 4t-inch | 88.9 | 121.442 | 15.083 | NTN | open | CN | 63 |
| L217849-L217810 | 4t-inch | 88.9 | 123.825 | 20.638 | NTN | open | CN | 89 |
| 42350-42584 | 4t-inch | 88.9 | 148.43 | 28.575 | NTN | open | CN | 153 |
| 593-592A | 593 | 88.9 | 152.4 | 39.688 | SKF | open | CN | 237 |
| 593-592A-NTN | 4t-inch | 88.9 | 152.4 | 39.688 | NTN | open | CN | 199 |
| HM518445-410 | HM518400 | 88.9 | 152.4 | 39.688 | SKF | open | CN | 300 |
| 759-752 | 4t-inch | 88.9 | 161.925 | 47.625 | NTN | open | CN | 299 |
| 6580-6535 | 6500 | 88.9 | 161.925 | 53.975 | SKF | open | CN | 404 |
| 6580-6535-NTN | 4t-inch | 88.9 | 161.925 | 53.975 | NTN | open | CN | 340 |
| 850-832 | 4t-inch | 88.9 | 168.275 | 53.975 | NTN | open | CN | 375 |
Exact-dimension interchange groups at 88.9 mm bore
These d×D×B envelopes at a 88.9 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:
Selecting a 88.9 mm bore bearing
The bore fixes the shaft, not the bearing capacity. At 88.9 mm the catalog spans 121.442–168.275 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 88.9 mm bore?
This index lists 10 verified bearing models with a 88.9 mm (3.500 in) bore across 1 bearing type, from 121.442 to 168.275 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.
How do I choose between the 121.442–168.275 mm OD options for a 88.9 mm shaft?
On a fixed 88.9 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 88.9 mm bearings?
A 88.9 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.