432209 bearing: complete specifications & equivalents
The 432209 is a ANSI ABMA 19.2 radial bearing sized 45 x 85 x 55 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 45 mm |
| Outer diameter D | 85 mm |
| Width B | 55 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 156 kN |
| Basic static load rating C0 | 200 kN |
| Limiting speed (mechanical) | 3700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1270 g |
| Manufacturer designation | NTN 4T-432209 |
| 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 | 1.772 in |
|---|---|
| Outer diameter D | 3.346 in |
| Width B | 2.165 in |
| ISO bore code | 09 |
| Radial section height (D−d)/2 | 20 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) | 2 of 39 |
| Bore above smallest 4t-432-series size | 5 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 432209 | 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 432209 model number is decoded
4T-432209 is an NTN double-row tapered roller bearing of TDO (back-to-back) construction: two cone assemblies against one double cup, supplied as a preset unit of 45×85×55 mm. 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 45 mm bore the 432 execution carries a wider, heavier section than the 430. Double-row capacity is not twice a single-row bearing: the printed 156 kN C already accounts for load sharing between the two rows of 4T-432209, so apply it directly in the L10 calculation. TDO construction means the two cone assemblies of 4T-432209 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 45 mm shaft. Axial clamping of the double cup must be uniform around the 85 mm OD; a cocked end cover pinches one row and destroys the factory clearance setting.
Typical equipment & failure modes
Common applications
- construction-equipment swing and pivot shafts
- industrial gearbox shafts in a single locating position
- rolling-mill work-roll and backup auxiliary positions
- crane travel and hoist drum shafts
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
- water-induced pitting when washdown reaches the open unit without external seals
Selection pitfalls — read before you substitute
- Gearbox positions of this 45 mm class rely on the preset clearance of 4T-432209; shimming or nut-tightening the unit like a single-row pair overruns the factory setting and runs the rows hot.
- The 432 heavy plan gives 4T-432209 its 55 mm width and 156 kN rating at the 45 mm bore; do not downgrade to a 430-family unit of the same bore without re-checking C, C0.
- Clamping the double cup with a cocked end cover pinches one row: tighten the 85 mm OD clamping uniformly around the circumference.
- Grease packs must leave free volume across the 55 mm width; over-greasing a unit churning near the 4,900 r/min oil-band speed raises temperature and expels the grease.
- Never interchange a TDO double-row unit with two single-row bearings of similar size: the 55 mm width, load spread and clearance logic of 4T-432209 are unit-specific.
- The 156/200 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-432209; 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-432209?
4T-432209 is a double-row tapered roller bearing of TDO (back-to-back) construction: 45 mm bore, 85 mm outside diameter and 55 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 156 kN, C0 200 kN (2203E prints a dash for Cu on this size), grease limiting speed 3,700 r/min, oil speed 4,900 r/min, mass about 1.27 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 45 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-432209 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-432209 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 55 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 432209 mean?
With no letter suffix, 432209 is the basic open double-row execution: steel cages, factory-set internal clearance, no feature suffix in the order code.
Why does 4T-432209 list two speeds, 3,700 and 4,900 r/min?
The lower figure, 3,700 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-432209 at 4,900 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.