432248UTG bearing: complete specifications & equivalents
The 432248UTG is a ANSI ABMA 19.2 radial bearing sized 240 x 440 x 266 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 240 mm |
| Outer diameter D | 440 mm |
| Width B | 266 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 3750 kN |
| Basic static load rating C0 | 5500 kN |
| Fatigue load limit Pu | 465 kN |
| Limiting speed (mechanical) | 640 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 160000 g |
| Manufacturer designation | NTN 4T-432248UTG |
| 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 | 9.449 in |
|---|---|
| Outer diameter D | 17.323 in |
| Width B | 10.472 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 100 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) | 26 of 39 |
| Bore above smallest 4t-432-series size | 200 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 432248UTG | 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 432248UTG model number is decoded
NTN supplies this 240 mm shaft position as 4T-432248UTG: a factory-adjusted double-row tapered roller bearing whose two roller rows share one double cup, overall width 266 mm. Suffix reading on 432248UTG: 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. The 15.6 kN of dynamic capacity per millimetre of bore summarises the 3750 kN rating over the 240 mm bore — compare substitution candidates on this ratio and on the 266 mm width. The internal clearance of 4T-432248UTG is set at the factory by the double cup and spacer-less grinding; do not attempt to re-adjust it with shaft nuts — the 266 mm overall width is the finished dimension. At 3750 kN C the unit offers about 15.6 kN per millimetre of the 240 mm bore — heavy-section TDO rows of this class run warm, so confirm oil availability before working near 900 r/min.
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
- roller large-end smearing against the cone ribs when one row of the unit runs starved of lubricant
- one-row flaking when a bent shaft concentrates the combined load on a single row of the pair
- overheated running after a field attempt to "tighten up" the factory-set internal clearance
- cage damage when the unit is lifted by one cone instead of the double cup during fitting
- indentation of both raceways by hard particles in an open, unsealed arrangement
Selection pitfalls — read before you substitute
- At 240 mm bore the 4T-432248UTG unit needs hydraulic or crane-assisted fitting and a verified oil supply; manual methods cannot control seating at the 3750 kN C level.
- The 432 heavy plan gives 4T-432248UTG its 266 mm width and 3750 kN rating at the 240 mm bore; do not downgrade to a 430-family unit of the same bore without re-checking C, C0 and the 465 kN Cu.
- Clamping the double cup with a cocked end cover pinches one row: tighten the 440 mm OD clamping uniformly around the circumference.
- Grease packs must leave free volume across the 266 mm width; over-greasing a unit churning near the 900 r/min oil-band speed raises temperature and expels the grease.
- Clamping the double cup with a cocked end cover pinches one row: tighten the 440 mm OD clamping uniformly around the circumference.
- The 3750/5500 kN ratings and 465 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-432248UTG; 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-432248UTG?
4T-432248UTG is a double-row tapered roller bearing of TDO (back-to-back) construction: 240 mm bore, 440 mm outside diameter and 266 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 3750 kN, C0 5500 kN, Cu 465 kN, grease limiting speed 640 r/min, oil speed 900 r/min, mass about 160 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 240 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-432248UTG 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-432248UTG 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 266 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 432248UTG mean?
Suffix reading on 432248UTG: 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-432248UTG list two speeds, 640 and 900 r/min?
The lower figure, 640 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-432248UTG at 900 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.