32212 bearing: complete specifications & equivalents
The 32212 is a ISO 355 radial bearing sized 60 x 110 x 29.75 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 60 mm |
| Outer diameter D | 110 mm |
| Width B | 29.75 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) | 1013 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 32212 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 32200-series range
| Bore d | 2.362 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.171 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 25 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) | 9 of 19 |
| Bore above smallest 32200-series size | 40 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32212 | 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 32212 model number is decoded
In the 32200-series the last two digits of 32212 encode the bore: code 12 = 60 mm (code × 5 from 04 upward). The ISO 355 envelope is 110 mm outside diameter and 29.75 mm total assembly width T over the separable cone and cup — 2.362 × 4.331 × 1.171 in, with a 25.0 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 60 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
- fork-lift steer axles
- industrial transmission shafts
- light-truck and van wheel hubs
- final-drive pinion and differential bearings
- commercial gearbox input/output shafts
Known failure patterns
- 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
- false brinelling from vibration while the axle is stationary during transport
- fretting corrosion on a loose shaft seat when the cone is pressed to an interference that relaxes with wear
Selection pitfalls — read before you substitute
- On this 60 mm-bore 32212, 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 60 mm seat can seize hot.
- The 322 medium series at 60 mm bore (110×29.75 mm) gains roller length and load over the 30212 on the same OD; the wider 29.75 mm assembly needs a wider housing shoulder and changes the pinion offset in a differential.
- The 29.75 mm-wide 32212 ring seats against a shaft and housing shoulder whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 60 mm bore and 110 mm cup seat square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 25.0 mm section.
- When mounting 32212 to a 60 mm shaft, warm the cone to 80–100 °C and slide it dry to the shoulder; cooling shrinks it into its interference, whereas hammering a cold cone through a 110 mm assembly dents the tapered raceway before first run.
- Keep the 32212 pair matched through rebuilds; the 29.75 mm running geometry and contact pattern are adjusted between the two cups, so replacing one side with an unmarked row shifts the contact patch off-centre and ruins the 60 mm shaft alignment.
- Do not swap a 32200 row for a ball bearing of the same bore: tapered rollers are heavier, slower (sliding rib contact caps the speed) and must be adjusted, but they outperform ball bearings on combined load and shock in gear and hub duty.
- Assign fits by which ring rotates: an interference shaft fit for a rotating cone; if the cup rotates instead, reverse the logic — a loose rotating ring creeps and frets its seat.
Frequently asked questions
What are the dimensions of a 32212 tapered roller bearing?
A 32212 single-row metric tapered roller bearing per ISO 355 has a 60 mm bore, 110 mm outer diameter and 29.75 mm total assembly width (2.362 × 4.331 × 1.171 in), a 25.0 mm radial section and roughly 1013 g geometry-based estimated mass; catalogue masses vary with roller and cage design.
How does the 32212 bore code work?
The last two digits of 32212 are bore code 12, giving 12 × 5 = 60 mm bore — the same convention as 6xx ball bearings, starting at code 04 (20 mm). The 110 mm OD and 29.75 mm width come from the ISO 355 diameter and width series, not the bore code alone.
What is the cone and cup of 32212?
Tapered roller bearings are separable: the cone is the inner ring with the tapered rollers and cage, the cup is the outer ring. 32212 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 32212 set?
At fit-up the 60 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 60 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 32212 take axial load in both directions?
A single 32212 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.