32022XU bearing: complete specifications & equivalents
The 32022XU is a ISO 355 radial bearing sized 110 x 170 x 38 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 | 170 mm |
| Width B | 38 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 261 kN |
| Basic static load rating C0 | 390 kN |
| Fatigue load limit Pu | 43 kN |
| Limiting speed (mechanical) | 2000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3070 g |
| Manufacturer designation | NTN 32022XU |
| 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 & 32000-series range
| Bore d | 4.331 in |
|---|---|
| Outer diameter D | 6.693 in |
| Width B | 1.496 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 30 mm |
| Smallest bore in 32000-series | 20 mm |
| Largest outer diameter in 32000-series | 650 mm |
| Width range across 32000-series | 15–130 mm |
| Bore position in 32000-series (smallest first) | 22 of 43 |
| Bore above smallest 32000-series size | 90 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32022XU | 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 32022XU model number is decoded
NTN supplies this 110 mm bore tapered roller position as 32022XU: one cone assembly, one cup, line-contact rollers and a steel cage, rated 261 kN basic dynamic and 390 kN static on the low-section 32000 family tuned for low friction. NTN also quotes this bearing with its ISO 355 dimension-series abbreviation, 4DC, which is the maker-neutral cross-reference for the 110×170 mm envelope; 4T is NTN's own tapered-roller brand mark on the parts. NTN grades 4T metric bearings as open bearings without integral seals; at 110 mm bore the application supplies the seals and the grease fill or oil supply to the 4DC ISO 355 assembly. Speed planning uses both catalogue columns: grease 2,000 r/min is the cage/rib mechanical ceiling for 32022XU, oil 2,700 r/min is available with circulating oil — a 700 r/min margin at this size. Mount the 110 mm-bore cone on the shaft first (induction heat, max 120 °C), fit the cup square in its housing, then set preload or end play; never drive the cup home through the rollers of 32022XU.
Typical equipment & failure modes
Common applications
- large agricultural and forestry machine axles
- heavy industrial gearboxes and crane travel drives
- rolling-mill auxiliary and pinion-stand shafts
- large conveyor and bucket-elevator pulleys
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- preload loss from racewear when one bearing of the paired set is replaced without re-adjusting end play
- rib scoring when axial load is carried beyond the cone rib capacity of the adjusted pair
- cage damage from a mounting blow delivered through the roller complement instead of the ring face
- water-induced pitting when the open bearing is exposed to washdown without external seals
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 3070 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The thin 38 mm section of 32022XU is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 110 mm bore smears the roller ends against the rib.
- On slash-size and T-code bearings confirm the full code on both cone and cup before fitting: the 110 mm bore alone does not identify the cup, and a mismatched cone/cup set has no catalogue rating.
- Replacing one half of an adjusted pair without resetting end play negates the 38 mm T dimension logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- The 30.0 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 32022XU or the ring will bottom out on the radius instead of the shoulder face.
- The 261/390 kN ratings and 43 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32022XU (ISO 355 4DC); 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 32022XU?
32022XU is a metric 4T tapered roller bearing to ISO 355: 110 mm bore, 170 mm outside diameter and 38 mm assembled width T (4.331 × 6.693 × 1.496 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 261 kN, C0 390 kN, Pu 43 kN, grease limiting speed 2,000 r/min, oil speed 2,700 r/min, mass about 3070 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32022XU?
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 (32022XU); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32022XU designation encode the 110 mm bore and what is 4DC?
last two digits 22 are the ISO bore code, ×5 = 110 mm (codes 00–03 use the 10/12/15/17 exception table). The 170 mm OD and 38 mm assembled T follow the ISO 355 dimension-series plan. 4DC 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 32022XU list two speeds, 2,000 and 2,700 r/min?
The lower figure, 2,000 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32022XU at 2,700 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32022XU mean?
Suffix reading on 32022XU: XU combines the X ISO boundary section with the U uprated internal design; 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.