32932XU bearing: complete specifications & equivalents
The 32932XU is a ISO 355 radial bearing sized 160 x 220 x 38 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 160 mm |
| Outer diameter D | 220 mm |
| Width B | 38 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 305 kN |
| Basic static load rating C0 | 520 kN |
| Fatigue load limit Pu | 52.5 kN |
| Limiting speed (mechanical) | 1500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4140 g |
| Manufacturer designation | NTN 32932XU |
| Standard | ISO 355 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); 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 & 32900-series range
| Bore d | 6.299 in |
|---|---|
| Outer diameter D | 8.661 in |
| Width B | 1.496 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 30 mm |
| Smallest bore in 32900-series | 35 mm |
| Largest outer diameter in 32900-series | 600 mm |
| Width range across 32900-series | 14–100 mm |
| Bore position in 32900-series (smallest first) | 21 of 37 |
| Bore above smallest 32900-series size | 125 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32932XU | 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 32932XU model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the NTN order number 32932XU denotes the extra-light thin-section 32900 family of metric tapered roller bearings, 160 mm bore, 220 mm outside diameter and 38 mm assembled width T (6.299 × 8.661 × 1.496 in) to the ISO 355 boundary plan. NTN also quotes this bearing with its ISO 355 dimension-series abbreviation, 2DC, which is the maker-neutral cross-reference for the 160×220 mm envelope; 4T is NTN's own tapered-roller brand mark on the parts. The pressed-steel cage and surface-finished roller ends are standard 4T execution; ULTAGE-marked variants use upgraded material and internal geometry aimed at longer rating life with the same ISO 355 envelope. Imperial cross-check for the drawing: 160×220×38 mm is 6.299 × 8.661 × 1.496 in; ISO 355 makes the envelope interchangeable but C/C0, 305/520 kN, is NTN-specific. Fillet radii must clear the ring chamfers of the 220 mm cup and 160 mm cone; use undercut shoulders so the rings seat fully rather than bridging on a shaft radius.
Typical equipment & failure modes
Common applications
- heavy haul railway traction gearboxes
- large marine propulsion reduction gears
- cement-plant kiln and mill drive trains
- rolling-mill roll-neck and gearbox positions
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- preload loss from racewear when one bearing of the paired set is replaced without re-adjusting end play
- rib scoring when axial load is carried beyond the cone rib capacity of the adjusted pair
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- edge loading when shaft deflection exceeds the few arc-minutes of misalignment the adjusted pair allows
Selection pitfalls — read before you substitute
- At 160 mm bore the 32932XU set is adjusted with hydraulic nuts on large mill and wind positions; follow the drive-up angle/end-play procedure, because manual torque methods cannot control preload at the 305 kN C level.
- The thin 38 mm section of 32932XU is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 160 mm bore smears the roller ends against the rib.
- Never fit the 160 mm cone by hammering the 220 mm cup: force for both press fits goes through the ring faces only, or brinell marks release as noise within the first running hours.
- Back-to-back and face-to-face arrangements react differently to shaft bending: pick the pair orientation for the moment load before locking the 160 mm shoulder geometry, because retrofitting flips the cups.
- Replacing one half of an adjusted pair without resetting end play negates the 38 mm T dimension logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- The 305/520 kN ratings and 52.5 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32932XU (ISO 355 2DC); internal geometry legitimately differs between manufacturers, so re-verify ratings, adjustment and suffix before substituting another make on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 32932XU?
32932XU is a metric 4T tapered roller bearing to ISO 355: 160 mm bore, 220 mm outside diameter and 38 mm assembled width T (6.299 × 8.661 × 1.496 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 305 kN, C0 520 kN, Pu 52.5 kN, grease limiting speed 1,500 r/min, oil speed 1,900 r/min, mass about 4140 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32932XU?
4T is NTN's tapered roller bearing brand mark, stamped on the cone and cup in the factory. It identifies the NTN 4T programme and is not a dimension, so the catalogue and this page list the bare ISO 355 number (32932XU); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32932XU designation encode the 160 mm bore and what is 2DC?
last two digits 32 are the ISO bore code, ×5 = 160 mm (codes 00–03 use the 10/12/15/17 exception table). The 220 mm OD and 38 mm assembled T follow the ISO 355 dimension-series plan. 2DC is the maker-neutral ISO 355 abbreviation for this dimension series (the same code other manufacturers print); 4T is NTN's own brand mark.
Why does 32932XU list two speeds, 1,500 and 1,900 r/min?
The lower figure, 1,500 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32932XU at 1,900 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32932XU mean?
Suffix reading on 32932XU: XU combines the X ISO boundary section with the U uprated internal design; U marks the reinforced/uprated internal design of the bare number, a separate order number with higher load capacity than the basic execution; the suffix is part of the order number and the variants are not interchangeable articles.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.