430236UUTG bearing: complete specifications & equivalents
The 430236UUTG is a ANSI ABMA 19.2 radial bearing sized 180 x 320 x 127 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 180 mm |
| Outer diameter D | 320 mm |
| Width B | 127 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1380 kN |
| Basic static load rating C0 | 1780 kN |
| Fatigue load limit Pu | 165 kN |
| Limiting speed (mechanical) | 890 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 39100 g |
| Manufacturer designation | NTN 4T-430236UUTG |
| Standard | ANSI ABMA 19.2 |
| Catalog version | NTN 2203E 2026-09-25 |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN 2203E 2026-09-25) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN 2203E 2026-09-25); 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 & 4t-430-series range
| Bore d | 7.087 in |
|---|---|
| Outer diameter D | 12.598 in |
| Width B | 5 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 70 mm |
| Smallest bore in 4t-430-series | 40 mm |
| Largest outer diameter in 4t-430-series | 870 mm |
| Width range across 4t-430-series | 45–310 mm |
| Bore position in 4t-430-series (smallest first) | 22 of 41 |
| Bore above smallest 4t-430-series size | 140 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 430236UUTG | 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 430236UUTG model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-430236UUTG denotes the light-duty 430-family TDO double-row series — a 180 mm bore double-row tapered unit rated 1380 kN basic dynamic and 1780 kN static. Unlike a pair of single-row bearings, the TDO unit of 4T-430236UUTG integrates both rows in one article: the 127 mm overall width and the internal clearance are ground and set by NTN, so there is no field adjustment dimension. Double-row capacity is not twice a single-row bearing: the printed 1380 kN C already accounts for load sharing between the two rows of 4T-430236UUTG, so apply it directly in the L10 calculation. TDO construction means the two cone assemblies of 4T-430236UUTG face away from each other inside one double cup: the load lines diverge outward, giving a wide effective spread and high moment stiffness for the 180 mm shaft. Do not separate the cones from the double cup at inspection unless re-matching is guaranteed — the rows of 4T-430236UUTG are ground as a unit.
Typical equipment & failure modes
Common applications
- rolling-mill roll-neck and pinion-stand positions
- mine hoist and dragline drum shafts
- cement-plant mill and kiln drive trains
- port-crane hoist and luffing gearboxes
Known failure patterns
- edge loading on one row when the housing seats the double cup cocked across its width
- one-row flaking when a bent shaft concentrates the combined load on a single row of the pair
- overheated running after a field attempt to "tighten up" the factory-set internal clearance
- cage damage when the unit is lifted by one cone instead of the double cup during fitting
- false brinelling on a stored or standby unit exposed to vibration
Selection pitfalls — read before you substitute
- At 180 mm bore the 4T-430236UUTG unit needs hydraulic or crane-assisted fitting and a verified oil supply; manual methods cannot control seating at the 1380 kN C level.
- The 430 light plan keeps 4T-430236UUTG narrower and faster than the 432 heavy execution of the same 180 mm bore; where shock or a high thrust share dominates, verify whether the heavier 432-family row is the intended position.
- Grease packs must leave free volume across the 127 mm width; over-greasing a unit churning near the 1,300 r/min oil-band speed raises temperature and expels the grease.
- Order by the full 430236UUTG code including suffixes — U, X, DX, E1 and UTG variants share the 180 mm bore but are different articles with different internal geometry.
- Never interchange a TDO double-row unit with two single-row bearings of similar size: the 127 mm width, load spread and clearance logic of 4T-430236UUTG are unit-specific.
- The 1380/1780 kN ratings and 165 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-430236UUTG; internal geometry legitimately differs between manufacturers, so re-verify ratings, clearance class and suffix before substituting another make on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 4T-430236UUTG?
4T-430236UUTG is a double-row tapered roller bearing of TDO (back-to-back) construction: 180 mm bore, 320 mm outside diameter and 127 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 1380 kN, C0 1780 kN, Cu 165 kN, grease limiting speed 890 r/min, oil speed 1,300 r/min, mass about 39.1 kg. It is an open, preset-clearance unit with pressed-steel cages.
What is the difference between the NTN 430 and 432 double-row series at 180 mm bore?
Both are TDO double-row tapered roller units, but 430 is the light plan and 432 the heavy plan: at the same bore the 432 execution is wider and heavier with higher load ratings. 4T-430236UUTG belongs to the light-duty 430-family TDO double-row series. Large sizes continue the plans as 4130/4131/4230/4231 (430 family) and 3230/3231 (432 family).
Can the internal clearance of 4T-430236UUTG be adjusted at mounting?
No. The TDO unit — two cone assemblies against one double cup — is ground and set by NTN at the factory, and the 127 mm overall width is the finished dimension. Mounting sets no end play: seat the unit square, clamp the cup uniformly and verify free rotation. Field re-adjustment overloads one row.
What do the suffix letters on 430236UUTG mean?
Suffix reading on 430236UUTG: UTG marks the ULTAGE specification for large NTN tapered rollers — upgraded material and internal design, printed with the ＊ symbol ahead of the order number; U marks the uprated/reinforced internal design, a separate order number with higher capacity than the basic execution; suffixed variants are separate order numbers and are not interchangeable articles.
Why does 4T-430236UUTG list two speeds, 890 and 1,300 r/min?
The lower figure, 890 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-430236UUTG at 1,300 r/min because oil removes heat from both roller rows better — the housing feed must reach both rows through the double cup.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN 2203E 2026-09-25 on 2026-10-01. Read our editorial & correction policy.