32232UUTG bearing: complete specifications & equivalents
The 32232UUTG is a ISO 355 radial bearing sized 160 x 290 x 84 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 160 mm |
| Outer diameter D | 290 mm |
| Width B | 84 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1140 kN |
| Basic static load rating C0 | 1420 kN |
| Fatigue load limit Pu | 136 kN |
| Limiting speed (mechanical) | 1200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 23900 g |
| Manufacturer designation | NTN 32232UUTG |
| 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 | 6.299 in |
|---|---|
| Outer diameter D | 11.417 in |
| Width B | 3.307 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 65 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) | 26 of 36 |
| Bore above smallest 32200-series size | 143 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32232UUTG | 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 32232UUTG model number is decoded
32232UUTG is the NTN 4T catalogue entry for a 160×290×84 mm metric tapered roller bearing — separable cone and cup, designed for combined radial and axial load as an individually adjusted bearing. The last two digits 32 are the ISO bore code, ×5 = 160 mm (codes 00–03 use the 10/12/15/17 exception table) under the ISO 355 numbering; the 84 mm value printed here is T, the width of the fully assembled cone-plus-cup set, not the inner-ring width alone. At 1140 kN C the bearing offers about 7.1 kN of dynamic capacity per millimetre of the 160 mm bore — compare any substitution on this ratio and the 84 mm assembled T, not on bore alone. Speed planning uses both catalogue columns: grease 1,200 r/min is the cage/rib mechanical ceiling for 32232UUTG, oil 1,700 r/min is available with circulating oil — a 500 r/min margin at this size. When pairing 32232UUTG 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
- 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
- fretting corrosion on a loose cone seat that creeps under rotating load
Selection pitfalls — read before you substitute
- At 160 mm bore the 32232UUTG 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 1140 kN C level.
- The heavy-section 32200 family at 160 mm bore (290×84 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 1,700 r/min oil ceiling.
- Back-to-back and face-to-face arrangements react differently to shaft bending: pick the pair orientation for the moment load before locking the 160 mm shoulder geometry, because retrofitting flips the cups.
- The 65.0 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 32232UUTG or the ring will bottom out on the radius instead of the shoulder face.
- Open 32232UUTG units have no seals: a wheel-hub or gearbox application needs external sealing or the 1,200 r/min grease figure is meaningless once water reaches the cone rib.
- The 1140/1420 kN ratings and 136 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32232UUTG (ISO 355 4GD); 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 32232UUTG?
32232UUTG is a metric 4T tapered roller bearing to ISO 355: 160 mm bore, 290 mm outside diameter and 84 mm assembled width T (6.299 × 11.417 × 3.307 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 1140 kN, C0 1420 kN, Pu 136 kN, grease limiting speed 1,200 r/min, oil speed 1,700 r/min, mass about 23900 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32232UUTG?
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 (32232UUTG); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32232UUTG designation encode the 160 mm bore and what is 4GD?
last two digits 32 are the ISO bore code, ×5 = 160 mm (codes 00–03 use the 10/12/15/17 exception table). The 290 mm OD and 84 mm assembled T follow the ISO 355 dimension-series plan. 4GD 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 32232UUTG list two speeds, 1,200 and 1,700 r/min?
The lower figure, 1,200 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32232UUTG at 1,700 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32232UUTG mean?
Suffix reading on 32232UUTG: the UUTG suffix marks the ULTAGE specification for large NTN tapered rollers — upgraded material and internal design for longer life inside the unchanged ISO 355 envelope; 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.