32240UUTG bearing: complete specifications & equivalents
The 32240UUTG is a ISO 355 radial bearing sized 200 x 360 x 104 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 200 mm |
| Outer diameter D | 360 mm |
| Width B | 104 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1690 kN |
| Basic static load rating C0 | 2130 kN |
| Fatigue load limit Pu | 191 kN |
| Limiting speed (mechanical) | 950 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 43800 g |
| Manufacturer designation | NTN 32240UUTG |
| 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 | 7.874 in |
|---|---|
| Outer diameter D | 14.173 in |
| Width B | 4.094 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 80 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) | 30 of 36 |
| Bore above smallest 32200-series size | 183 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32240UUTG | 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 32240UUTG model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the NTN order number 32240UUTG denotes the heavy-section 32200 family of metric tapered roller bearings, 200 mm bore, 360 mm outside diameter and 104 mm assembled width T (7.874 × 14.173 × 4.094 in) to the ISO 355 boundary plan. Digit by digit, the bare number identifies the heavy-section 32200 family and a bore code resolving to 200 mm; 360 mm OD and 104 mm assembled T are the matching ISO 355 boundary dimensions shared with other makers of the same dimension series. 2203E lists two speed ceilings for 32240UUTG: 950 r/min with grease lubrication (the limiting speed) and 1,300 r/min with oil, the higher oil value reflecting better heat removal from the cone rib. Catalogue mass of the 32240UUTG set is 43800 g (1.724 lb cone + cup); abutment and shaft shoulder design must carry that mass square to the axis. Open 4T bearings need application seals; without them the grease at the cone rib of 32240UUTG washes out and the rib/roller-end contact smears on the first wet or dusty shift.
Typical equipment & failure modes
Common applications
- large marine propulsion reduction gears
- cement-plant kiln and mill drive trains
- rolling-mill roll-neck and gearbox positions
- large crusher and SAG/AG-mill drive shafts
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
- rolling-contact fatigue after the catalogue L10 life at the actual combined load
Selection pitfalls — read before you substitute
- At 200 mm bore the 32240UUTG 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 1690 kN C level.
- The heavy-section 32200 family at 200 mm bore (360×104 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 1,300 r/min oil ceiling.
- Replacing one half of an adjusted pair without resetting end play negates the 104 mm T dimension logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- The 80.0 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 32240UUTG or the ring will bottom out on the radius instead of the shoulder face.
- Grease packs must leave free volume in the 104 mm-wide set; over-greasing a paired bearing churning at the 1,300 r/min oil-band speed raises temperature and destroys the preload setting.
- The 1690/2130 kN ratings and 191 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32240UUTG (ISO 355 3GD); 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 32240UUTG?
32240UUTG is a metric 4T tapered roller bearing to ISO 355: 200 mm bore, 360 mm outside diameter and 104 mm assembled width T (7.874 × 14.173 × 4.094 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 1690 kN, C0 2130 kN, Pu 191 kN, grease limiting speed 950 r/min, oil speed 1,300 r/min, mass about 43800 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32240UUTG?
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 (32240UUTG); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32240UUTG designation encode the 200 mm bore and what is 3GD?
last two digits 40 are the ISO bore code, ×5 = 200 mm (codes 00–03 use the 10/12/15/17 exception table). The 360 mm OD and 104 mm assembled T follow the ISO 355 dimension-series plan. 3GD 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 32240UUTG list two speeds, 950 and 1,300 r/min?
The lower figure, 950 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32240UUTG at 1,300 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32240UUTG mean?
Suffix reading on 32240UUTG: 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.