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82.55 mm bore bearings

16 models with a 82.55 mm (3.250 in) bore across 1 bearing type, outside diameters from 125.412 to 168.275 mm. Tables are grouped by type; open a model for full specs and equivalents.

16 models 125.412–168.275 mm OD range 2 brands

Tapered Roller Bearings (16)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
27687-27620 4t-inch 82.55 125.412 25.4 NTN open CN 113
47686-47620 4t-inch 82.55 133.35 33.338 NTN open CN 170
HM516448-HM516410 4t-inch 82.55 133.35 39.688 NTN open CN 196
495-493 4t-inch 82.55 136.525 30.162 NTN open CN 143
580-572 575 82.55 139.992 36.512 SKF open CN 227
580-572-NTN 4t-inch 82.55 139.992 36.512 NTN open CN 197
582-572 4t-inch 82.55 139.992 36.512 NTN open CN 197
663-653 655 82.55 146.05 41.275 SKF open CN 270
663-653-NTN 4t-inch 82.55 146.05 41.275 NTN open CN 228
749A-742 745 82.55 150.089 44.45 SKF open CN 351
749A-742-NTN 4t-inch 82.55 150.089 44.45 NTN open CN 289
595-592A 4t-inch 82.55 152.4 39.688 NTN open CN 199
663-652 4t-inch 82.55 152.4 41.275 NTN open CN 228
757-752 4t-inch 82.55 161.925 47.625 NTN open CN 299
6559C-6535 4t-inch 82.55 161.925 53.975 NTN open CN 340
842-832 4t-inch 82.55 168.275 53.975 NTN open CN 375

Exact-dimension interchange groups at 82.55 mm bore

These d×D×B envelopes at a 82.55 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 82.55 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 82.55 mm the catalog spans 125.412–168.275 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 82.55 mm bore?

This index lists 16 verified bearing models with a 82.55 mm (3.250 in) bore across 1 bearing type, from 125.412 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 125.412–168.275 mm OD options for a 82.55 mm shaft?

On a fixed 82.55 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 82.55 mm bearings?

A 82.55 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.