430317XU bearing: complete specifications & equivalents
The 430317XU is a ANSI ABMA 19.2 radial bearing sized 85 x 180 x 98 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 85 mm |
| Outer diameter D | 180 mm |
| Width B | 98 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 580 kN |
| Basic static load rating C0 | 725 kN |
| Fatigue load limit Pu | 81 kN |
| Limiting speed (mechanical) | 1800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 10800 g |
| Manufacturer designation | NTN 4T-430317XU |
| 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 | 3.346 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 3.858 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 47.5 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) | 10 of 41 |
| Bore above smallest 4t-430-series size | 45 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 430317XU | 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 430317XU model number is decoded
NTN supplies this 85 mm shaft position as 4T-430317XU: a factory-adjusted double-row tapered roller bearing whose two roller rows share one double cup, overall width 98 mm. Suffix reading on 430317XU: U marks the uprated/reinforced internal design, a separate order number with higher capacity than the basic execution; X marks the boundary-dimension revision of the base number (D and width differ from the plain number of the same bore); suffixed variants are separate order numbers and are not interchangeable articles. Selection: C 580 kN against C0 725 kN gives a C0/C ratio of 1.25; the two rows of 4T-430317XU share the combined load as one bearing position. TDO construction means the two cone assemblies of 4T-430317XU 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 85 mm shaft. Do not separate the cones from the double cup at inspection unless re-matching is guaranteed — the rows of 4T-430317XU are ground as a unit.
Typical equipment & failure modes
Common applications
- bulk-handling stacker/reclaimer travel drives
- large mixer and agitator shafts
- heavy gearbox and mill drive shafts
- crusher and screening-plant main shafts
Known failure patterns
- edge loading on one row when the housing seats the double cup cocked across its width
- preload loss and hammering noise when the cup clamping loosens and the unit gains axial float
- brinelling of both rows from a mounting blow transmitted through the roller complements
- cage damage when the unit is lifted by one cone instead of the double cup during fitting
- water-induced pitting when washdown reaches the open unit without external seals
Selection pitfalls — read before you substitute
- Mount the 85 mm unit by induction heating (max 120 °C); at 10.8 kg a cocked lift damages the cages and ribs before the bearing ever runs.
- The 430 light plan keeps 4T-430317XU narrower and faster than the 432 heavy execution of the same 85 mm bore; where shock or a high thrust share dominates, verify whether the heavier 432-family row is the intended position.
- At inspection do not mix the cone assemblies of 4T-430317XU with another unit; rows are ground together and re-matching is not guaranteed in the field.
- Lubricant must reach both rows: a housing groove aligned to the cup mid-width of 4T-430317XU feeds the two roller complements evenly; a single-side feed starves the far row.
- The internal clearance of 4T-430317XU is factory-set: no end-play adjustment exists at mounting, and any attempt to set preload with a shaft nut overloads one row.
- The 580/725 kN ratings and 81 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-430317XU; 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-430317XU?
4T-430317XU is a double-row tapered roller bearing of TDO (back-to-back) construction: 85 mm bore, 180 mm outside diameter and 98 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 580 kN, C0 725 kN, Cu 81 kN, grease limiting speed 1,800 r/min, oil speed 2,400 r/min, mass about 10.8 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 85 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-430317XU 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-430317XU 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 98 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 430317XU mean?
Suffix reading on 430317XU: U marks the uprated/reinforced internal design, a separate order number with higher capacity than the basic execution; X marks the boundary-dimension revision of the base number (D and width differ from the plain number of the same bore); suffixed variants are separate order numbers and are not interchangeable articles.
Why does 4T-430317XU list two speeds, 1,800 and 2,400 r/min?
The lower figure, 1,800 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-430317XU at 2,400 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.