32017XU bearing: complete specifications & equivalents
The 32017XU is a ISO 355 radial bearing sized 85 x 130 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 | 85 mm |
| Outer diameter D | 130 mm |
| Width B | 29 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 157 kN |
| Basic static load rating C0 | 224 kN |
| Fatigue load limit Pu | 26.7 kN |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1340 g |
| Manufacturer designation | NTN 32017XU |
| 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 | 3.346 in |
|---|---|
| Outer diameter D | 5.118 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) | 17 of 43 |
| Bore above smallest 32000-series size | 65 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32017XU | 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 32017XU model number is decoded
32017XU is a metric single-row tapered roller bearing in the NTN 4T programme: a pressed-steel cage guides profiled rollers between a separable cone and cup on the 85×130 mm ISO 355 envelope, with 29 mm overall assembled width T. NTN also quotes this bearing with its ISO 355 dimension-series abbreviation, 4CC, which is the maker-neutral cross-reference for the 85×130 mm envelope; 4T is NTN's own tapered-roller brand mark on the parts. The rollers run with their large ends against the cone's integral guide rib; the rib/end-flange contact carries the thrust component and is the reason lubricant must reach the rib face of 32017XU, not only the raceway. Grease relubrication at 2,600 r/min limiting speed targets the rib contact; if the drive needs 3,500 r/min it must be arranged for oil lubrication with a defined flow to the large roller ends. Open 4T bearings need application seals; without them the grease at the cone rib of 32017XU washes out and the rib/roller-end contact smears on the first wet or dusty shift.
Typical equipment & failure modes
Common applications
- paper-machine press-section rolls
- large agricultural and forestry machine axles
- heavy industrial gearboxes and crane travel drives
- rolling-mill auxiliary and pinion-stand shafts
Known failure patterns
- cone-raceway spalling at the large rib when preload is set too high for the lubricant film
- flaking on one cone only when a back-to-back / face-to-face pair is loaded unevenly by a bent shaft
- smearing on the roller large ends and cone rib after a dry start with preload but no oil film
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- water-induced pitting when the open bearing is exposed to washdown without external seals
Selection pitfalls — read before you substitute
- Mount the 85 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 1340 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The thin 29 mm section of 32017XU is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 85 mm bore smears the roller ends against the rib.
- On slash-size and T-code bearings confirm the full code on both cone and cup before fitting: the 85 mm bore alone does not identify the cup, and a mismatched cone/cup set has no catalogue rating.
- Never fit the 85 mm cone by hammering the 130 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 85 mm shoulder geometry, because retrofitting flips the cups.
- The 157/224 kN ratings and 26.7 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32017XU (ISO 355 4CC); 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 32017XU?
32017XU is a metric 4T tapered roller bearing to ISO 355: 85 mm bore, 130 mm outside diameter and 29 mm assembled width T (3.346 × 5.118 × 1.142 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 157 kN, C0 224 kN, Pu 26.7 kN, grease limiting speed 2,600 r/min, oil speed 3,500 r/min, mass about 1340 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32017XU?
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 (32017XU); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32017XU designation encode the 85 mm bore and what is 4CC?
last two digits 17 are the ISO bore code, ×5 = 85 mm (codes 00–03 use the 10/12/15/17 exception table). The 130 mm OD and 29 mm assembled T follow the ISO 355 dimension-series plan. 4CC 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 32017XU list two speeds, 2,600 and 3,500 r/min?
The lower figure, 2,600 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32017XU at 3,500 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32017XU mean?
Suffix reading on 32017XU: 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.