32020XU bearing: complete specifications & equivalents
The 32020XU is a ISO 355 radial bearing sized 100 x 150 x 32 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 100 mm |
| Outer diameter D | 150 mm |
| Width B | 32 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 188 kN |
| Basic static load rating C0 | 281 kN |
| Fatigue load limit Pu | 32 kN |
| Limiting speed (mechanical) | 2200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1910 g |
| Manufacturer designation | NTN 32020XU |
| 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 | 3.937 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 1.26 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 25 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) | 20 of 43 |
| Bore above smallest 32000-series size | 80 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32020XU | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
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 32020XU model number is decoded
For a 100 mm shaft with a thrust component, NTN lists 32020XU, a metric 4T tapered roller bearing of 188 kN C and 281 kN C0 inside the 150 mm OD, 32 mm-wide assembled set. The last two digits 20 are the ISO bore code, ×5 = 100 mm (codes 00–03 use the 10/12/15/17 exception table) under the ISO 355 numbering; the 32 mm value printed here is T, the width of the fully assembled cone-plus-cup set, not the inner-ring width alone. At 188 kN C the bearing offers about 1.9 kN of dynamic capacity per millimetre of the 100 mm bore — compare any substitution on this ratio and the 32 mm assembled T, not on bore alone. Grease relubrication at 2,200 r/min limiting speed targets the rib contact; if the drive needs 3,000 r/min it must be arranged for oil lubrication with a defined flow to the large roller ends. With a rotating shaft a k5/m5 shaft seat and a press-fit cup are typical catalogue practice for 32020XU; reverse the logic if the cup rotates, and re-verify against load direction and magnitude.
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
- cone-raceway spalling at the large rib when preload is set too high for the lubricant film
- rib scoring when axial load is carried beyond the cone rib capacity of the adjusted pair
- preload loss from racewear when one bearing of the paired set is replaced without re-adjusting end play
- cage damage from a mounting blow delivered through the roller complement instead of the ring face
- edge loading when shaft deflection exceeds the few arc-minutes of misalignment the adjusted pair allows
Selection pitfalls — read before you substitute
- Mount the 100 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 1910 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The thin 32 mm section of 32020XU is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 100 mm bore smears the roller ends against the rib.
- The 25.0 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 32020XU or the ring will bottom out on the radius instead of the shoulder face.
- The U/UTG/X/C/CA/D suffix variants of a base number share the bore but not the article: ordering 32020XU by size alone can deliver the wrong contact-angle execution for a pinion position.
- Open 32020XU units have no seals: a wheel-hub or gearbox application needs external sealing or the 2,200 r/min grease figure is meaningless once water reaches the cone rib.
- The 188/281 kN ratings and 32 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32020XU (ISO 355 4CC); 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 32020XU?
32020XU is a metric 4T tapered roller bearing to ISO 355: 100 mm bore, 150 mm outside diameter and 32 mm assembled width T (3.937 × 5.906 × 1.26 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 188 kN, C0 281 kN, Pu 32 kN, grease limiting speed 2,200 r/min, oil speed 3,000 r/min, mass about 1910 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32020XU?
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 (32020XU); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32020XU designation encode the 100 mm bore and what is 4CC?
last two digits 20 are the ISO bore code, ×5 = 100 mm (codes 00–03 use the 10/12/15/17 exception table). The 150 mm OD and 32 mm assembled T follow the ISO 355 dimension-series plan. 4CC 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 32020XU list two speeds, 2,200 and 3,000 r/min?
The lower figure, 2,200 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32020XU at 3,000 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32020XU mean?
Suffix reading on 32020XU: 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.