30222 bearing: complete specifications & equivalents
The 30222 is a ISO 355 radial bearing sized 110 x 200 x 41 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 110 mm |
| Outer diameter D | 200 mm |
| Width B | 41 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) | 4584 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 30222 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 30200-series range
| Bore d | 4.331 in |
|---|---|
| Outer diameter D | 7.874 in |
| Width B | 1.614 in |
| ISO bore code | 22 |
| Radial section height (D−d)/2 | 45 mm |
| Smallest bore in 30200-series | 20 mm |
| Largest outer diameter in 30200-series | 200 mm |
| Width range across 30200-series | 15.25–41 mm |
| Bore position in 30200-series (smallest first) | 19 of 19 |
| Bore above smallest 30200-series size | 90 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 30222 | 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 30222 model number is decoded
In the 30200-series the last two digits of 30222 encode the bore: code 22 = 110 mm (code × 5 from 04 upward). The ISO 355 envelope is 200 mm outside diameter and 41 mm total assembly width T over the separable cone and cup — 4.331 × 7.874 × 1.614 in, with a 45.0 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 110 mm shaft, typical catalogue practice is a m6 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
- railway axle boxes
- agricultural tractor axles
- truck and trailer wheel hubs
- heavy final drives and differentials
- large conveyor drum pulleys
Known failure patterns
- fretting corrosion on a loose shaft seat when the cone is pressed to an interference that relaxes with wear
- cup creep and housing bore fretting when the outer ring is left without its specified press fit
- 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
Selection pitfalls — read before you substitute
- The large 110 mm-bore 30222 develops substantial mounting forces; heat the cone (induction heater, max 120 °C) and never tighten the adjusting nut to seat it — draw it up by torque, then back off to the mark, leaving roughly 0.05–0.20 mm end play on the 110 mm shaft.
- The 302 light series at 110 mm bore (200×41 mm, 45.0 mm section) is the default general-purpose tapered row; a 32222 on the same 110 mm bore uses the same OD but a wider section for heavier load — it is not a like-for-like width swap.
- Before fitting 30222, machine the 110 mm shaft seat and 200 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 41 mm-wide cone and cup only load correctly when the full faces abut, and a large radius pinches the 45.0 mm radial section.
- The 30222 cup drives into the 200 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 41 mm load zone.
- Inspect the removed 30222 cone and cup as a pair: pitting on the 200 mm cup with a clean cone usually means seal failure and water ingress, while rib scoring on the 110 mm cone points to wrong preload or lost EP film — the two faults need different corrections.
- Do not swap a 30200 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 30222 tapered roller bearing?
A 30222 single-row metric tapered roller bearing per ISO 355 has a 110 mm bore, 200 mm outer diameter and 41 mm total assembly width (4.331 × 7.874 × 1.614 in), a 45.0 mm radial section and roughly 4584 g geometry-based estimated mass; catalogue masses vary with roller and cage design.
How does the 30222 bore code work?
The last two digits of 30222 are bore code 22, giving 22 × 5 = 110 mm bore — the same convention as 6xx ball bearings, starting at code 04 (20 mm). The 200 mm OD and 41 mm width come from the ISO 355 diameter and width series, not the bore code alone.
What is the cone and cup of 30222?
Tapered roller bearings are separable: the cone is the inner ring with the tapered rollers and cage, the cup is the outer ring. 30222 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 30222 set?
At fit-up the 110 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 0.05–0.20 mm for a 110 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 30222 take axial load in both directions?
A single 30222 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.