423176UTG bearing: complete specifications & equivalents
The 423176UTG is a ANSI ABMA 19.2 radial bearing sized 380 x 620 x 243 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 380 mm |
| Outer diameter D | 620 mm |
| Width B | 243 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 4250 kN |
| Basic static load rating C0 | 6700 kN |
| Fatigue load limit Pu | 505 kN |
| Limiting speed (mechanical) | 410 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 260000 g |
| Manufacturer designation | NTN 4T-423176UTG |
| 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 | 14.961 in |
|---|---|
| Outer diameter D | 24.409 in |
| Width B | 9.567 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 120 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) | 33 of 41 |
| Bore above smallest 4t-430-series size | 340 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 423176UTG | 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 423176UTG model number is decoded
4T-423176UTG belongs to the light-duty 430-family TDO double-row series of NTN double-row tapered roller bearings; the unit is mounted as one article and its internal clearance is set at the factory, not on the shaft. Reading the designation: the last two digits 76 are the bore code, ×5 = 380 mm (codes 00–03 use the 10/12/15/17 exception table); the leading digits place the bearing in the light-duty 430-family TDO double-row series. The 120.0 mm radial section over the 380 mm bore carries two roller rows across the 243 mm width; abutment shoulders must clear both cone bores and the double-cup OD. TDO construction means the two cone assemblies of 4T-423176UTG 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 380 mm shaft. With a rotating shaft a m6/n6 seat on the 380 mm journal and a located cup in the housing are typical practice for 4T-423176UTG.
Typical equipment & failure modes
Common applications
- cement-plant mill and kiln drive trains
- port-crane hoist and luffing gearboxes
- heavy press and forging-machine drives
- large shredder and recycler main shafts
Known failure patterns
- edge loading on one row when the housing seats the double cup cocked across its width
- overheated running after a field attempt to "tighten up" the factory-set internal clearance
- one-row flaking when a bent shaft concentrates the combined load on a single row of the pair
- pressed-steel cage pocket wear from roller skid at light load and high speed
- false brinelling on a stored or standby unit exposed to vibration
Selection pitfalls — read before you substitute
- At 380 mm bore the 4T-423176UTG unit needs hydraulic or crane-assisted fitting and a verified oil supply; manual methods cannot control seating at the 4250 kN C level.
- The 430 light plan keeps 4T-423176UTG narrower and faster than the 432 heavy execution of the same 380 mm bore; where shock or a high thrust share dominates, verify whether the heavier 432-family row is the intended position.
- Order by the full 423176UTG code including suffixes — U, X, DX, E1 and UTG variants share the 380 mm bore but are different articles with different internal geometry.
- Open 4T-423176UTG units have no seals: the housing must seal both rows or the 410 r/min grease figure is meaningless once contamination enters.
- Grease packs must leave free volume across the 243 mm width; over-greasing a unit churning near the 580 r/min oil-band speed raises temperature and expels the grease.
- The 4250/6700 kN ratings and 505 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-423176UTG; 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-423176UTG?
4T-423176UTG is a double-row tapered roller bearing of TDO (back-to-back) construction: 380 mm bore, 620 mm outside diameter and 243 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 4250 kN, C0 6700 kN, Cu 505 kN, grease limiting speed 410 r/min, oil speed 580 r/min, mass about 260 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 380 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-423176UTG 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-423176UTG 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 243 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 423176UTG mean?
Suffix reading on 423176UTG: UTG marks the ULTAGE specification for large NTN tapered rollers — upgraded material and internal design, printed with the ＊ symbol ahead of the order number; suffixed variants are separate order numbers and are not interchangeable articles.
Why does 4T-423176UTG list two speeds, 410 and 580 r/min?
The lower figure, 410 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-423176UTG at 580 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.