323134UTG bearing: complete specifications & equivalents
The 323134UTG is a ANSI ABMA 19.2 radial bearing sized 170 x 280 x 88 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 170 mm |
| Outer diameter D | 280 mm |
| Width B | 88 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 930 kN |
| Basic static load rating C0 | 1270 kN |
| Fatigue load limit Pu | 122 kN |
| Limiting speed (mechanical) | 1000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 21800 g |
| Manufacturer designation | NTN 4T-323134UTG |
| 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 | 6.693 in |
|---|---|
| Outer diameter D | 11.024 in |
| Width B | 3.465 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 55 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) | 21 of 39 |
| Bore above smallest 4t-432-series size | 130 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 323134UTG | 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 323134UTG model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-323134UTG denotes the heavy-duty 432-family TDO double-row series — a 170 mm bore double-row tapered unit rated 930 kN basic dynamic and 1270 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 — 323134UTG reads accordingly. The fatigue load limit Cu printed for 4T-323134UTG is 122 kN — the equivalent-load floor below which high reliability is expected even under contamination in the adjusted-life equation. Because the unit is preset, mounting 4T-323134UTG 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. With a rotating shaft a m6/n6 seat on the 170 mm journal and a located cup in the housing are typical practice for 4T-323134UTG.
Typical equipment & failure modes
Common applications
- heavy press and forging-machine drives
- large shredder and recycler main shafts
- power-plant mill and fan shafts
- rolling-mill roll-neck and pinion-stand positions
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
- pressed-steel cage pocket wear from roller skid at light load and high speed
- rolling-contact fatigue spalling after the catalogue L10 life at the actual combined load
Selection pitfalls — read before you substitute
- At 170 mm bore the 4T-323134UTG unit needs hydraulic or crane-assisted fitting and a verified oil supply; manual methods cannot control seating at the 930 kN C level.
- The 432 heavy plan gives 4T-323134UTG its 88 mm width and 930 kN rating at the 170 mm bore; do not downgrade to a 430-family unit of the same bore without re-checking C, C0 and the 122 kN Cu.
- The 55.0 mm section leaves little room for oversized shaft fillets; follow the 2203E chamfer table for 4T-323134UTG or the cones bottom out on the radius.
- At inspection do not mix the cone assemblies of 4T-323134UTG with another unit; rows are ground together and re-matching is not guaranteed in the field.
- The internal clearance of 4T-323134UTG is factory-set: no end-play adjustment exists at mounting, and any attempt to set preload with a shaft nut overloads one row.
- The 930/1270 kN ratings and 122 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-323134UTG; 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-323134UTG?
4T-323134UTG is a double-row tapered roller bearing of TDO (back-to-back) construction: 170 mm bore, 280 mm outside diameter and 88 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 930 kN, C0 1270 kN, Cu 122 kN, grease limiting speed 1,000 r/min, oil speed 1,500 r/min, mass about 21.8 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 170 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-323134UTG 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-323134UTG 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 88 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 323134UTG mean?
Suffix reading on 323134UTG: 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-323134UTG list two speeds, 1,000 and 1,500 r/min?
The lower figure, 1,000 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-323134UTG at 1,500 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.