32088UTG bearing: complete specifications & equivalents
The 32088UTG is a ISO 355 radial bearing sized 440 x 650 x 130 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 440 mm |
| Outer diameter D | 650 mm |
| Width B | 130 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 3250 kN |
| Basic static load rating C0 | 5000 kN |
| Fatigue load limit Pu | 365 kN |
| Limiting speed (mechanical) | 440 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 140000 g |
| Manufacturer designation | NTN 32088UTG |
| 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 | 17.323 in |
|---|---|
| Outer diameter D | 25.591 in |
| Width B | 5.118 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 105 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) | 43 of 43 |
| Bore above smallest 32000-series size | 420 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32088UTG | 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 32088UTG model number is decoded
For a 440 mm shaft with a thrust component, NTN lists 32088UTG, a metric 4T tapered roller bearing of 3250 kN C and 5000 kN C0 inside the 650 mm OD, 130 mm-wide assembled set. The last two digits 88 are the ISO bore code, ×5 = 440 mm (codes 00–03 use the 10/12/15/17 exception table) under the ISO 355 numbering; the 130 mm value printed here is T, the width of the fully assembled cone-plus-cup set, not the inner-ring width alone. NTN adjusts these bearings by cup or cone position rather than shipping a preloaded set; the mounting drawing must state end play or preload for 32088UTG, since running clearance is set during assembly. Imperial cross-check for the drawing: 440×650×130 mm is 17.323 × 25.591 × 5.118 in; ISO 355 makes the envelope interchangeable but C/C0, 3250/5000 kN, is NTN-specific. Mount the 440 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 32088UTG.
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
- cone-raceway spalling at the large rib when preload is set too high for the lubricant film
- 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 fatigue when the pair is run continuously near the grease limiting speed without oil cooling
- indentation of the raceways by hard particles in unsealed open arrangements
Selection pitfalls — read before you substitute
- At 440 mm bore the 32088UTG 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 3250 kN C level.
- The thin 130 mm section of 32088UTG is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 440 mm bore smears the roller ends against the rib.
- Minimum load matters at high speed: an unloaded 32088UTG at a large fraction of 440 r/min lets rollers skid and smear the cone rib; spring-preload lightly loaded pair arrangements.
- The 105.0 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 32088UTG or the ring will bottom out on the radius instead of the shoulder face.
- On slash-size and T-code bearings confirm the full code on both cone and cup before fitting: the 440 mm bore alone does not identify the cup, and a mismatched cone/cup set has no catalogue rating.
- The 3250/5000 kN ratings and 365 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32088UTG; 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 32088UTG?
32088UTG is a metric 4T tapered roller bearing to ISO 355: 440 mm bore, 650 mm outside diameter and 130 mm assembled width T (17.323 × 25.591 × 5.118 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 3250 kN, C0 5000 kN, Pu 365 kN, grease limiting speed 440 r/min, oil speed 620 r/min, mass about 140000 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32088UTG?
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 (32088UTG); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32088UTG designation encode the 440 mm bore?
last two digits 88 are the ISO bore code, ×5 = 440 mm (codes 00–03 use the 10/12/15/17 exception table). The 650 mm OD and 130 mm assembled T follow the ISO 355 dimension-series plan.
Why does 32088UTG list two speeds, 440 and 620 r/min?
The lower figure, 440 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32088UTG at 620 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32088UTG mean?
Suffix reading on 32088UTG: the UTG 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.