32038XUUTG bearing: complete specifications & equivalents
The 32038XUUTG is a ISO 355 radial bearing sized 190 x 290 x 64 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 190 mm |
| Outer diameter D | 290 mm |
| Width B | 64 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 840 kN |
| Basic static load rating C0 | 1210 kN |
| Fatigue load limit Pu | 113 kN |
| Limiting speed (mechanical) | 1100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 15000 g |
| Manufacturer designation | NTN 32038XUUTG |
| 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 | 7.48 in |
|---|---|
| Outer diameter D | 11.417 in |
| Width B | 2.52 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 50 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) | 30 of 43 |
| Bore above smallest 32000-series size | 170 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32038XUUTG | 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 32038XUUTG model number is decoded
For a 190 mm shaft with a thrust component, NTN lists 32038XUUTG, a metric 4T tapered roller bearing of 840 kN C and 1210 kN C0 inside the 290 mm OD, 64 mm-wide assembled set. Digit by digit, the bare number identifies the low-section 32000 family tuned for low friction and a bore code resolving to 190 mm; 290 mm OD and 64 mm assembled T are the matching ISO 355 boundary dimensions shared with other makers of the same dimension series. Suffix reading on 32038XUUTG: 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. Speed planning uses both catalogue columns: grease 1,100 r/min is the cage/rib mechanical ceiling for 32038XUUTG, oil 1,600 r/min is available with circulating oil — a 500 r/min margin at this size. When pairing 32038XUUTG with a second tapered bearing, keep the matched arrangement clean: a single stray grit particle between cup and housing changes preload faster than the adjustment range can correct.
Typical equipment & failure modes
Common applications
- cement-plant kiln and mill drive trains
- rolling-mill roll-neck and gearbox positions
- large crusher and SAG/AG-mill drive shafts
- wind-turbine gearbox and main-shaft arrangements
Known failure patterns
- cone-raceway spalling at the large rib when preload is set too high for the lubricant film
- smearing on the roller large ends and cone rib after a dry start with preload but no oil film
- flaking on one cone only when a back-to-back / face-to-face pair is loaded unevenly by a bent shaft
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- rolling-contact fatigue after the catalogue L10 life at the actual combined load
Selection pitfalls — read before you substitute
- At 190 mm bore the 32038XUUTG 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 840 kN C level.
- The thin 64 mm section of 32038XUUTG is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 190 mm bore smears the roller ends against the rib.
- Never fit the 190 mm cone by hammering the 290 mm cup: force for both press fits goes through the ring faces only, or brinell marks release as noise within the first running hours.
- ISO 355 makes the 190×290 mm envelope interchangeable but not the ratings: NTN prints 840/1210 kN for this execution, and a cheaper same-number part can differ in roller complement and steel.
- ISO 355 makes the 190×290 mm envelope interchangeable but not the ratings: NTN prints 840/1210 kN for this execution, and a cheaper same-number part can differ in roller complement and steel.
- The 840/1210 kN ratings and 113 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32038XUUTG (ISO 355 4FD); 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 32038XUUTG?
32038XUUTG is a metric 4T tapered roller bearing to ISO 355: 190 mm bore, 290 mm outside diameter and 64 mm assembled width T (7.48 × 11.417 × 2.52 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 840 kN, C0 1210 kN, Pu 113 kN, grease limiting speed 1,100 r/min, oil speed 1,600 r/min, mass about 15000 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32038XUUTG?
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 (32038XUUTG); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32038XUUTG designation encode the 190 mm bore and what is 4FD?
last two digits 38 are the ISO bore code, ×5 = 190 mm (codes 00–03 use the 10/12/15/17 exception table). The 290 mm OD and 64 mm assembled T follow the ISO 355 dimension-series plan. 4FD 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 32038XUUTG list two speeds, 1,100 and 1,600 r/min?
The lower figure, 1,100 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32038XUUTG at 1,600 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32038XUUTG mean?
Suffix reading on 32038XUUTG: 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.