430315XU bearing: complete specifications & equivalents
The 430315XU is a ANSI ABMA 19.2 radial bearing sized 75 x 160 x 87 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 75 mm |
| Outer diameter D | 160 mm |
| Width B | 87 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 485 kN |
| Basic static load rating C0 | 605 kN |
| Fatigue load limit Pu | 70 kN |
| Limiting speed (mechanical) | 2000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 7710 g |
| Manufacturer designation | NTN 4T-430315XU |
| 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 | 2.953 in |
|---|---|
| Outer diameter D | 6.299 in |
| Width B | 3.425 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 42.5 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) | 8 of 41 |
| Bore above smallest 4t-430-series size | 35 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 430315XU | 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 430315XU model number is decoded
For a 75 mm shaft needing a compact two-direction thrust location, NTN lists 4T-430315XU, a TDO double-row 4T unit of 485 kN C and 605 kN C0 in the light-duty 430-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 75 mm bore the 432 execution carries a wider, heavier section than the 430. Speed planning uses both catalogue columns: grease 2,000 r/min is the mechanical ceiling, oil 2,700 r/min with oil lubrication — a 700 r/min margin at this size. Because the unit is preset, mounting 4T-430315XU resembles mounting a double-row spherical or cylindrical bearing: seat the unit, clamp axially to the stated end cover torque, and verify rotation — no end-play measurement is required. The preset clearance suits the standard temperature range; unusual thermal gradients between shaft and housing call for a clearance review against the 75 mm size before ordering 4T-430315XU.
Typical equipment & failure modes
Common applications
- crusher and screening-plant main shafts
- large fan and blower shafts with thrust reversal
- steel-plant roller table and conveyor drives
- marine winch and deck-machinery shafts
Known failure patterns
- edge loading on one row when the housing seats the double cup cocked across its width
- brinelling of both rows from a mounting blow transmitted through the roller complements
- preload loss and hammering noise when the cup clamping loosens and the unit gains axial float
- cage damage when the unit is lifted by one cone instead of the double cup during fitting
- rolling-contact fatigue spalling after the catalogue L10 life at the actual combined load
Selection pitfalls — read before you substitute
- Mount the 75 mm unit by induction heating (max 120 °C); at 7.71 kg a cocked lift damages the cages and ribs before the bearing ever runs.
- The 430 light plan keeps 4T-430315XU narrower and faster than the 432 heavy execution of the same 75 mm bore; where shock or a high thrust share dominates, verify whether the heavier 432-family row is the intended position.
- An unloaded 4T-430315XU near 2,000 r/min lets rollers skid; ensure a minimum load or light spring preload on high-speed positions.
- Order by the full 430315XU code including suffixes — U, X, DX, E1 and UTG variants share the 75 mm bore but are different articles with different internal geometry.
- At inspection do not mix the cone assemblies of 4T-430315XU with another unit; rows are ground together and re-matching is not guaranteed in the field.
- The 485/605 kN ratings and 70 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-430315XU; 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-430315XU?
4T-430315XU is a double-row tapered roller bearing of TDO (back-to-back) construction: 75 mm bore, 160 mm outside diameter and 87 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 485 kN, C0 605 kN, Cu 70 kN, grease limiting speed 2,000 r/min, oil speed 2,700 r/min, mass about 7.71 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 75 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-430315XU 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-430315XU 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 87 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 430315XU mean?
Suffix reading on 430315XU: 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-430315XU list two speeds, 2,000 and 2,700 r/min?
The lower figure, 2,000 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-430315XU at 2,700 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.