430313XU bearing: complete specifications & equivalents
The 430313XU is a ANSI ABMA 19.2 radial bearing sized 65 x 140 x 79 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 | 79 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 385 kN |
| Basic static load rating C0 | 475 kN |
| Fatigue load limit Pu | 57.5 kN |
| Limiting speed (mechanical) | 2300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 5410 g |
| Manufacturer designation | NTN 4T-430313XU |
| 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 | 2.559 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 3.11 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 37.5 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) | 6 of 41 |
| Bore above smallest 4t-430-series size | 25 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 430313XU | 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 430313XU model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-430313XU denotes the light-duty 430-family TDO double-row series — a 65 mm bore double-row tapered unit rated 385 kN basic dynamic and 475 kN static. Large sizes continue the plans under different leading digits: 4130/4131 and 4230/4231 belong to the 430-family dimension plan, while 3230/3231 continue the 432 heavy plan — 430313XU reads accordingly. Double-row capacity is not twice a single-row bearing: the printed 385 kN C already accounts for load sharing between the two rows of 4T-430313XU, so apply it directly in the L10 calculation. The internal clearance of 4T-430313XU is set at the factory by the double cup and spacer-less grinding; do not attempt to re-adjust it with shaft nuts — the 79 mm overall width is the finished dimension. At 385 kN C the unit offers about 5.9 kN per millimetre of the 65 mm bore — heavy-section TDO rows of this class run warm, so confirm oil availability before working near 3,100 r/min.
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
- 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
- cage damage when the unit is lifted by one cone instead of the double cup during fitting
- fretting corrosion on a loose cone seat that creeps under rotating load
Selection pitfalls — read before you substitute
- Mount the 65 mm unit by induction heating (max 120 °C); at 5.41 kg a cocked lift damages the cages and ribs before the bearing ever runs.
- The 430 light plan keeps 4T-430313XU narrower and faster than the 432 heavy execution of the same 65 mm bore; where shock or a high thrust share dominates, verify whether the heavier 432-family row is the intended position.
- The 385 kN C already includes two-row load sharing — do not double it when pairing the unit with a floating bearing in the L10 calculation.
- An unloaded 4T-430313XU near 2,300 r/min lets rollers skid; ensure a minimum load or light spring preload on high-speed positions.
- Open 4T-430313XU units have no seals: the housing must seal both rows or the 2,300 r/min grease figure is meaningless once contamination enters.
- The 385/475 kN ratings and 57.5 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-430313XU; 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-430313XU?
4T-430313XU is a double-row tapered roller bearing of TDO (back-to-back) construction: 65 mm bore, 140 mm outside diameter and 79 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 385 kN, C0 475 kN, Cu 57.5 kN, grease limiting speed 2,300 r/min, oil speed 3,100 r/min, mass about 5.41 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-430313XU 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-430313XU 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 79 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 430313XU mean?
Suffix reading on 430313XU: 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-430313XU 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-430313XU 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.