32052XUUTG bearing: complete specifications & equivalents
The 32052XUUTG is a ISO 355 radial bearing sized 260 x 400 x 87 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 260 mm |
| Outer diameter D | 400 mm |
| Width B | 87 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1540 kN |
| Basic static load rating C0 | 2270 kN |
| Fatigue load limit Pu | 193 kN |
| Limiting speed (mechanical) | 800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 39000 g |
| Manufacturer designation | NTN 32052XUUTG |
| 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 | 10.236 in |
|---|---|
| Outer diameter D | 15.748 in |
| Width B | 3.425 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 70 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) | 34 of 43 |
| Bore above smallest 32000-series size | 240 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32052XUUTG | 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 32052XUUTG model number is decoded
NTN supplies this 260 mm bore tapered roller position as 32052XUUTG: one cone assembly, one cup, line-contact rollers and a steel cage, rated 1540 kN basic dynamic and 2270 kN static on the low-section 32000 family tuned for low friction. The last two digits 52 are the ISO bore code, ×5 = 260 mm (codes 00–03 use the 10/12/15/17 exception table) under the ISO 355 numbering; the 87 mm value printed here is T, the width of the fully assembled cone-plus-cup set, not the inner-ring width alone. Suffix reading on 32052XUUTG: the XUUTG suffix marks the ULTAGE specification for large NTN tapered rollers — upgraded material and internal design for longer life inside the unchanged ISO 355 envelope; XU combines the X ISO boundary section with the U uprated internal design; the suffix is part of the order number and the variants are not interchangeable articles. Selection: C 1540 kN against C0 2270 kN gives a C0/C ratio of 1.47 for the 260 mm bore, and the equivalent combined load must keep below the rating at the target L10 with the pair counted as one unit. Mount the 260 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 32052XUUTG.
Typical equipment & failure modes
Common applications
- offshore crane and drawworks drums
- heavy haul railway traction gearboxes
- large marine propulsion reduction gears
- cement-plant kiln and mill drive trains
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- 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 fatigue when the pair is run continuously near the grease limiting speed without oil cooling
- water-induced pitting when the open bearing is exposed to washdown without external seals
Selection pitfalls — read before you substitute
- At 260 mm bore the 32052XUUTG set is adjusted with hydraulic nuts on large mill and wind positions; follow the drive-up angle/end-play procedure, because manual torque methods cannot control preload at the 1540 kN C level.
- The thin 87 mm section of 32052XUUTG is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 260 mm bore smears the roller ends against the rib.
- Open 32052XUUTG units have no seals: a wheel-hub or gearbox application needs external sealing or the 800 r/min grease figure is meaningless once water reaches the cone rib.
- On slash-size and T-code bearings confirm the full code on both cone and cup before fitting: the 260 mm bore alone does not identify the cup, and a mismatched cone/cup set has no catalogue rating.
- ISO 355 makes the 260×400 mm envelope interchangeable but not the ratings: NTN prints 1540/2270 kN for this execution, and a cheaper same-number part can differ in roller complement and steel.
- The 1540/2270 kN ratings and 193 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32052XUUTG (ISO 355 4FC); 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 32052XUUTG?
32052XUUTG is a metric 4T tapered roller bearing to ISO 355: 260 mm bore, 400 mm outside diameter and 87 mm assembled width T (10.236 × 15.748 × 3.425 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 1540 kN, C0 2270 kN, Pu 193 kN, grease limiting speed 800 r/min, oil speed 1,100 r/min, mass about 39000 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32052XUUTG?
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 (32052XUUTG); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32052XUUTG designation encode the 260 mm bore and what is 4FC?
last two digits 52 are the ISO bore code, ×5 = 260 mm (codes 00–03 use the 10/12/15/17 exception table). The 400 mm OD and 87 mm assembled T follow the ISO 355 dimension-series plan. 4FC 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 32052XUUTG list two speeds, 800 and 1,100 r/min?
The lower figure, 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 32052XUUTG at 1,100 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32052XUUTG mean?
Suffix reading on 32052XUUTG: the XUUTG suffix marks the ULTAGE specification for large NTN tapered rollers — upgraded material and internal design for longer life inside the unchanged ISO 355 envelope; XU combines the X ISO boundary section with the U uprated internal design; 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.