432218U bearing: complete specifications & equivalents
The 432218U is a ANSI ABMA 19.2 radial bearing sized 90 x 160 x 94 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 90 mm |
| Outer diameter D | 160 mm |
| Width B | 94 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 500 kN |
| Basic static load rating C0 | 720 kN |
| Fatigue load limit Pu | 82.5 kN |
| Limiting speed (mechanical) | 1900 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 7350 g |
| Manufacturer designation | NTN 4T-432218U |
| 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 | 3.543 in |
|---|---|
| Outer diameter D | 6.299 in |
| Width B | 3.701 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 35 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) | 11 of 39 |
| Bore above smallest 4t-432-series size | 50 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 432218U | 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 432218U model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-432218U denotes the heavy-duty 432-family TDO double-row series — a 90 mm bore double-row tapered unit rated 500 kN basic dynamic and 720 kN static. Unlike a pair of single-row bearings, the TDO unit of 4T-432218U integrates both rows in one article: the 94 mm overall width and the internal clearance are ground and set by NTN, so there is no field adjustment dimension. Catalogue mass of 4T-432218U is 7.35 kg; lifting and fitting tackle must be rated for the whole preset unit, not for single-ring handling. TDO construction means the two cone assemblies of 4T-432218U 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 90 mm shaft. The open unit carries no seals; the housing of 4T-432218U must provide sealing and the grease fill or oil feed to both rows.
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
- 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
- cage fatigue after continuous running near the grease limiting speed without oil cooling
- water-induced pitting when washdown reaches the open unit without external seals
Selection pitfalls — read before you substitute
- Mount the 90 mm unit by induction heating (max 120 °C); at 7.35 kg a cocked lift damages the cages and ribs before the bearing ever runs.
- The 432 heavy plan gives 4T-432218U its 94 mm width and 500 kN rating at the 90 mm bore; do not downgrade to a 430-family unit of the same bore without re-checking C, C0 and the 82.5 kN Cu.
- Never interchange a TDO double-row unit with two single-row bearings of similar size: the 94 mm width, load spread and clearance logic of 4T-432218U are unit-specific.
- An unloaded 4T-432218U near 1,900 r/min lets rollers skid; ensure a minimum load or light spring preload on high-speed positions.
- The 500 kN C already includes two-row load sharing — do not double it when pairing the unit with a floating bearing in the L10 calculation.
- The 500/720 kN ratings and 82.5 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-432218U; 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-432218U?
4T-432218U is a double-row tapered roller bearing of TDO (back-to-back) construction: 90 mm bore, 160 mm outside diameter and 94 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 500 kN, C0 720 kN, Cu 82.5 kN, grease limiting speed 1,900 r/min, oil speed 2,500 r/min, mass about 7.35 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 90 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-432218U 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-432218U 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 94 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 432218U mean?
Suffix reading on 432218U: U marks the uprated/reinforced internal design, a separate order number with higher capacity than the basic execution; suffixed variants are separate order numbers and are not interchangeable articles.
Why does 4T-432218U list two speeds, 1,900 and 2,500 r/min?
The lower figure, 1,900 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-432218U at 2,500 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.