432313U bearing: complete specifications & equivalents
The 432313U is a ANSI ABMA 19.2 radial bearing sized 65 x 140 x 108 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 65 mm |
| Outer diameter D | 140 mm |
| Width B | 108 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 520 kN |
| Basic static load rating C0 | 700 kN |
| Fatigue load limit Pu | 85 kN |
| Limiting speed (mechanical) | 2300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 7550 g |
| Manufacturer designation | NTN 4T-432313U |
| 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-432-series range
| Bore d | 2.559 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 4.252 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in 4t-432-series | 40 mm |
| Largest outer diameter in 4t-432-series | 790 mm |
| Width range across 4t-432-series | 46–266 mm |
| Bore position in 4t-432-series (smallest first) | 6 of 39 |
| Bore above smallest 4t-432-series size | 25 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 432313U | 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 432313U model number is decoded
For a 65 mm shaft needing a compact two-direction thrust location, NTN lists 4T-432313U, a TDO double-row 4T unit of 520 kN C and 700 kN C0 in the heavy-duty 432-family TDO double-row series. The 4T- prefix is NTN's tapered roller quality mark; 430 numbers the light TDO plan and 432 the heavy TDO plan — at the same 65 mm bore the 432 execution carries a wider, heavier section than the 430. The fatigue load limit Cu printed for 4T-432313U is 85 kN — the equivalent-load floor below which high reliability is expected even under contamination in the adjusted-life equation. TDO construction means the two cone assemblies of 4T-432313U 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 65 mm shaft. With a rotating shaft a k5/m5 seat on the 65 mm journal and a located cup in the housing are typical practice for 4T-432313U.
Typical equipment & failure modes
Common applications
- large mixer and agitator shafts
- heavy gearbox and mill drive shafts
- crusher and screening-plant main shafts
- large fan and blower shafts with thrust reversal
Known failure patterns
- roller large-end smearing against the cone ribs when one row of the unit runs starved of lubricant
- 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
- pressed-steel cage pocket wear from roller skid at light load and high speed
- water-induced pitting when washdown reaches the open unit without external seals
Selection pitfalls — read before you substitute
- Mount the 65 mm unit by induction heating (max 120 °C); at 7.55 kg a cocked lift damages the cages and ribs before the bearing ever runs.
- The 432 heavy plan gives 4T-432313U its 108 mm width and 520 kN rating at the 65 mm bore; do not downgrade to a 430-family unit of the same bore without re-checking C, C0 and the 85 kN Cu.
- At inspection do not mix the cone assemblies of 4T-432313U with another unit; rows are ground together and re-matching is not guaranteed in the field.
- Order by the full 432313U code including suffixes — U, X, DX, E1 and UTG variants share the 65 mm bore but are different articles with different internal geometry.
- Lubricant must reach both rows: a housing groove aligned to the cup mid-width of 4T-432313U feeds the two roller complements evenly; a single-side feed starves the far row.
- The 520/700 kN ratings and 85 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-432313U; 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-432313U?
4T-432313U is a double-row tapered roller bearing of TDO (back-to-back) construction: 65 mm bore, 140 mm outside diameter and 108 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 520 kN, C0 700 kN, Cu 85 kN, grease limiting speed 2,300 r/min, oil speed 3,100 r/min, mass about 7.55 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 65 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-432313U belongs to the heavy-duty 432-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-432313U 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 108 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 432313U mean?
Suffix reading on 432313U: 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-432313U list two speeds, 2,300 and 3,100 r/min?
The lower figure, 2,300 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-432313U at 3,100 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.