32210 bearing: complete specifications & equivalents
The 32210 is a ISO 355 radial bearing sized 50 x 90 x 24.75 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 50 mm |
| Outer diameter D | 90 mm |
| Width B | 24.75 mm |
| Seal / shield | open |
| Internal clearance | CN available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 555 g |
| Standard | ISO 355 |
| Catalog version | iso355-geometry |
| Last verified | 2026-09-24 |
Source: ISO 15 boundary-dimensions standard · extracted 2026-09-24
Standard-interchange bearing: dimensions per ISO 15; CN clearance, P0 tolerance and a stamped-steel cage are catalogue defaults unless the supplier states otherwise, and mass is a geometry-derived estimate. Brand catalogue load ratings and limiting speeds for 32210 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 32200-series range
| Bore d | 1.969 in |
|---|---|
| Outer diameter D | 3.543 in |
| Width B | 0.974 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in 32200-series | 20 mm |
| Largest outer diameter in 32200-series | 200 mm |
| Width range across 32200-series | 19–56 mm |
| Bore position in 32200-series (smallest first) | 7 of 19 |
| Bore above smallest 32200-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32210 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 32210 model number is decoded
In the 32200-series the last two digits of 32210 encode the bore: code 10 = 50 mm (code × 5 from 04 upward). The ISO 355 envelope is 90 mm outside diameter and 24.75 mm total assembly width T over the separable cone and cup — 1.969 × 3.543 × 0.974 in, with a 20.0 mm radial section height. Tapered rollers carry combined radial and single-direction axial load; bidirectional thrust needs an opposed pair (X face-to-face or O back-to-back) adjusted at fit-up. With a rotating cone on a 50 mm shaft, typical catalogue practice is a k5 shaft seat with an H7 housing bore, EP lubrication and a defined end-play setting — verify against the load direction and magnitude.
Typical equipment & failure modes
Common applications
- commercial gearbox input/output shafts
- conveyor head and tail pulleys
- fork-lift steer axles
- industrial transmission shafts
- light-truck and van wheel hubs
Known failure patterns
- roller large-end smearing and scoring against the inner-ring guide rib from loss of the EP lubricant film
- raceway spalling at the roller-rib junction after the L10 life or sustained axial overload
- over-preload heat: a shim stack cut too thin drives contact stress up and seizes the cone on the seat
- under-preload end play that lets the rollers skid, producing noise and false brinelling
- water and grit pitting in unsealed hubs where the cup-cone joint acts as a debris entry path
Selection pitfalls — read before you substitute
- On this 50 mm-bore 32210, thermal growth of the shaft closes up the adjusted clearance; set cold end play around 0.03–0.12 mm and recheck after the first hot run — a medium-series cone that was correct cold on the 50 mm seat can seize hot.
- The 322 medium series at 50 mm bore (90×24.75 mm) gains roller length and load over the 30210 on the same OD; the wider 24.75 mm assembly needs a wider housing shoulder and changes the pinion offset in a differential.
- Before fitting 32210, machine the 50 mm shaft seat and 90 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 24.75 mm-wide cone and cup only load correctly when the full faces abut, and a large radius pinches the 20.0 mm radial section.
- The 32210 cup drives into the 90 mm housing bore with a sleeve against its outer face only; pressure on the inner ring or cage transfers through the rollers and leaves indentations that become spalls within the 24.75 mm load zone.
- Relubrication for 32210 must reach the rib-roller end contact, not just the 50 mm bore; in a hub repack, work EP grease through the roller set until it exudes at both faces of the 24.75 mm-wide assembly or the sliding rib contact starves first.
- Tapered rollers accept virtually no misalignment; a deflected 50 mm shaft or a tilted housing shoulder concentrates load on one end of the 24.75 mm-wide roller row — align seats and verify housing perpendicularity.
- Press the 32210 cone onto the 50 mm shaft with force on the inner ring and the cup into the 90 mm housing on the outer ring; driving through the rollers or transmitting mounting force across the assembly brinells the raceways.
Frequently asked questions
What are the dimensions of a 32210 tapered roller bearing?
A 32210 single-row metric tapered roller bearing per ISO 355 has a 50 mm bore, 90 mm outer diameter and 24.75 mm total assembly width (1.969 × 3.543 × 0.974 in), a 20.0 mm radial section and roughly 555 g geometry-based estimated mass; catalogue masses vary with roller and cage design.
How does the 32210 bore code work?
The last two digits of 32210 are bore code 10, giving 10 × 5 = 50 mm bore — the same convention as 6xx ball bearings, starting at code 04 (20 mm). The 90 mm OD and 24.75 mm width come from the ISO 355 diameter and width series, not the bore code alone.
What is the cone and cup of 32210?
Tapered roller bearings are separable: the cone is the inner ring with the tapered rollers and cage, the cup is the outer ring. 32210 denotes a matched cone-and-cup set. They are fitted separately — cone pressed on the shaft, cup in the housing — and adjusted against each other.
How is the preload or clearance of 32210 set?
At fit-up the 50 mm-bore cone is tightened against the cup while the hub is rotated, seated, then backed off to the specified end play — a typical starting range of 0.03–0.12 mm for a 50 mm bore — and locked with shims, a locknut or a spacer. Too tight overheats and seizes the rib; too loose causes skid, noise and early wear. Confirm the exact figure in the hub or axle-maker procedure.
Can 32210 take axial load in both directions?
A single 32210 takes thrust in one direction only — the roller large ends bear against the inner-ring rib under load. Bidirectional axial load requires an opposed pair: X (face-to-face) tolerates misalignment slightly better, O (back-to-back) gives a wider load centre and more moment stiffness.
Reviewed & verified by the MPN Base engineering desk against source catalog iso355-geometry on 2026-09-24. Read our editorial & correction policy.