32016XU bearing: complete specifications & equivalents
The 32016XU is a ISO 355 radial bearing sized 80 x 125 x 29 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 80 mm |
| Outer diameter D | 125 mm |
| Width B | 29 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 154 kN |
| Basic static load rating C0 | 216 kN |
| Fatigue load limit Pu | 26.1 kN |
| Limiting speed (mechanical) | 2800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1280 g |
| Manufacturer designation | NTN 32016XU |
| 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 & 32000-series range
| Bore d | 3.15 in |
|---|---|
| Outer diameter D | 4.921 in |
| Width B | 1.142 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 22.5 mm |
| Smallest bore in 32000-series | 20 mm |
| Largest outer diameter in 32000-series | 650 mm |
| Width range across 32000-series | 15–130 mm |
| Bore position in 32000-series (smallest first) | 16 of 43 |
| Bore above smallest 32000-series size | 60 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32016XU | 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 32016XU model number is decoded
For a 80 mm shaft with a thrust component, NTN lists 32016XU, a metric 4T tapered roller bearing of 154 kN C and 216 kN C0 inside the 125 mm OD, 29 mm-wide assembled set. Digit by digit, the bare number identifies the low-section 32000 family tuned for low friction and a bore code resolving to 80 mm; 125 mm OD and 29 mm assembled T are the matching ISO 355 boundary dimensions shared with other makers of the same dimension series. Individually mounted, 32016XU takes axial force in one direction only; two bearings are arranged face-to-face (X) or back-to-back (O) according to the moment stiffness and misalignment the shaft requires. The fatigue load limit Pu printed for 32016XU is 26.1 kN; in the adjusted-life equation that is the equivalent-load floor below which high reliability is expected even under contamination. Re-adjustment after bedding-in is standard practice: re-check end play once the paired 32016XU arrangement has run in, because initial seat seating relaxes the set preload slightly.
Typical equipment & failure modes
Common applications
- heavy industrial gearboxes and crane travel drives
- rolling-mill auxiliary and pinion-stand shafts
- large conveyor and bucket-elevator pulleys
- mineral-processing feeder and crusher auxiliaries
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
- cage fatigue when the pair is run continuously near the grease limiting speed without oil cooling
- false brinelling on a stationary paired set exposed to external vibration
Selection pitfalls — read before you substitute
- Mount the 80 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 1280 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The thin 29 mm section of 32016XU is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 80 mm bore smears the roller ends against the rib.
- Never fit the 80 mm cone by hammering the 125 mm cup: force for both press fits goes through the ring faces only, or brinell marks release as noise within the first running hours.
- The U/UTG/X/C/CA/D suffix variants of a base number share the bore but not the article: ordering 32016XU by size alone can deliver the wrong contact-angle execution for a pinion position.
- Never fit the 80 mm cone by hammering the 125 mm cup: force for both press fits goes through the ring faces only, or brinell marks release as noise within the first running hours.
- The 154/216 kN ratings and 26.1 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32016XU (ISO 355 3CC); 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 32016XU?
32016XU is a metric 4T tapered roller bearing to ISO 355: 80 mm bore, 125 mm outside diameter and 29 mm assembled width T (3.15 × 4.921 × 1.142 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 154 kN, C0 216 kN, Pu 26.1 kN, grease limiting speed 2,800 r/min, oil speed 3,700 r/min, mass about 1280 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32016XU?
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 (32016XU); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32016XU designation encode the 80 mm bore and what is 3CC?
last two digits 16 are the ISO bore code, ×5 = 80 mm (codes 00–03 use the 10/12/15/17 exception table). The 125 mm OD and 29 mm assembled T follow the ISO 355 dimension-series plan. 3CC 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 32016XU list two speeds, 2,800 and 3,700 r/min?
The lower figure, 2,800 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32016XU at 3,700 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32016XU mean?
Suffix reading on 32016XU: 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.