32222U bearing: complete specifications & equivalents
The 32222U is a ISO 355 radial bearing sized 110 x 200 x 56 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 110 mm |
| Outer diameter D | 200 mm |
| Width B | 56 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 465 kN |
| Basic static load rating C0 | 605 kN |
| Fatigue load limit Pu | 65 kN |
| Limiting speed (mechanical) | 1800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 7440 g |
| Manufacturer designation | NTN 32222U |
| Standard | ISO 355 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.com.
Dimensions in inches & 32200-series range
| Bore d | 4.331 in |
|---|---|
| Outer diameter D | 7.874 in |
| Width B | 2.205 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 45 mm |
| Smallest bore in 32200-series | 17 mm |
| Largest outer diameter in 32200-series | 580 mm |
| Width range across 32200-series | 17.25–159 mm |
| Bore position in 32200-series (smallest first) | 21 of 36 |
| Bore above smallest 32200-series size | 93 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32222U | 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 32222U model number is decoded
32222U is a metric single-row tapered roller bearing in the NTN 4T programme: a pressed-steel cage guides profiled rollers between a separable cone and cup on the 110×200 mm ISO 355 envelope, with 56 mm overall assembled width T. NTN also quotes this bearing with its ISO 355 dimension-series abbreviation, 3FC, which is the maker-neutral cross-reference for the 110×200 mm envelope; 4T is NTN's own tapered-roller brand mark on the parts. The rollers run with their large ends against the cone's integral guide rib; the rib/end-flange contact carries the thrust component and is the reason lubricant must reach the rib face of 32222U, not only the raceway. Imperial cross-check for the drawing: 110×200×56 mm is 4.331 × 7.874 × 2.205 in; ISO 355 makes the envelope interchangeable but C/C0, 465/605 kN, is NTN-specific. Re-adjustment after bedding-in is standard practice: re-check end play once the paired 32222U arrangement has run in, because initial seat seating relaxes the set preload slightly.
Typical equipment & failure modes
Common applications
- mineral-processing feeder and crusher auxiliaries
- marine winch and deck-machinery shafts
- paper-machine press-section rolls
- large agricultural and forestry machine axles
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- flaking on one cone only when a back-to-back / face-to-face pair is loaded unevenly by a bent shaft
- smearing on the roller large ends and cone rib after a dry start with preload but no oil film
- cage fatigue when the pair is run continuously near the grease limiting speed without oil cooling
- fretting corrosion on a loose cone seat that creeps under rotating load
Selection pitfalls — read before you substitute
- Mount the 110 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 7440 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The heavy-section 32200 family at 110 mm bore (200×56 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 2,400 r/min oil ceiling.
- Replacing one half of an adjusted pair without resetting end play negates the 56 mm T dimension logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- Replacing one half of an adjusted pair without resetting end play negates the 56 mm T dimension logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- Back-to-back and face-to-face arrangements react differently to shaft bending: pick the pair orientation for the moment load before locking the 110 mm shoulder geometry, because retrofitting flips the cups.
- The 465/605 kN ratings and 65 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32222U (ISO 355 3FC); internal geometry legitimately differs between manufacturers, so re-verify ratings, adjustment and suffix before substituting another make on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 32222U?
32222U is a metric 4T tapered roller bearing to ISO 355: 110 mm bore, 200 mm outside diameter and 56 mm assembled width T (4.331 × 7.874 × 2.205 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 465 kN, C0 605 kN, Pu 65 kN, grease limiting speed 1,800 r/min, oil speed 2,400 r/min, mass about 7440 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32222U?
4T is NTN's tapered roller bearing brand mark, stamped on the cone and cup in the factory. It identifies the NTN 4T programme and is not a dimension, so the catalogue and this page list the bare ISO 355 number (32222U); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32222U designation encode the 110 mm bore and what is 3FC?
last two digits 22 are the ISO bore code, ×5 = 110 mm (codes 00–03 use the 10/12/15/17 exception table). The 200 mm OD and 56 mm assembled T follow the ISO 355 dimension-series plan. 3FC is the maker-neutral ISO 355 abbreviation for this dimension series (the same code other manufacturers print); 4T is NTN's own brand mark.
Why does 32222U list two speeds, 1,800 and 2,400 r/min?
The lower figure, 1,800 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32222U at 2,400 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32222U mean?
Suffix reading on 32222U: U marks the reinforced/uprated internal design of the bare number, a separate order number with higher load capacity than the basic execution; the suffix is part of the order number and the variants are not interchangeable articles.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.