32913XU bearing: complete specifications & equivalents
The 32913XU is a ISO 355 radial bearing sized 65 x 90 x 17 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 65 mm |
| Outer diameter D | 90 mm |
| Width B | 17 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 53.5 kN |
| Basic static load rating C0 | 85 kN |
| Fatigue load limit Pu | 10.4 kN |
| Limiting speed (mechanical) | 3700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 315 g |
| Manufacturer designation | NTN 32913XU |
| 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 | 2.559 in |
|---|---|
| Outer diameter D | 3.543 in |
| Width B | 0.669 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 12.5 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) | 7 of 37 |
| Bore above smallest 32900-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32913XU | 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 32913XU model number is decoded
32913XU 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 65×90 mm ISO 355 envelope, with 17 mm overall assembled width T. Digit by digit, the bare number identifies the extra-light thin-section 32900 family and a bore code resolving to 65 mm; 90 mm OD and 17 mm assembled T are the matching ISO 355 boundary dimensions shared with other makers of the same dimension series. Individually mounted, 32913XU 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 12.5 mm section height over the 65 mm bore positions the load centre; axial location of the pair depends on that contact line, so spacer faces must be square within the P0 tolerance of the bearing. Open 4T bearings need application seals; without them the grease at the cone rib of 32913XU washes out and the rib/roller-end contact smears on the first wet or dusty shift.
Typical equipment & failure modes
Common applications
- mineral-processing feeder and crusher auxiliaries
- marine winch and deck-machinery shafts
- paper-machine press-section rolls
- large agricultural and forestry machine axles
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- 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 65 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 315 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The thin 17 mm section of 32913XU is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 65 mm bore smears the roller ends against the rib.
- ISO 355 makes the 65×90 mm envelope interchangeable but not the ratings: NTN prints 53.5/85 kN for this execution, and a cheaper same-number part can differ in roller complement and steel.
- Never fit the 65 mm cone by hammering the 90 mm cup: force for both press fits goes through the ring faces only, or brinell marks release as noise within the first running hours.
- Never fit the 65 mm cone by hammering the 90 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 53.5/85 kN ratings and 10.4 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32913XU (ISO 355 2BC); 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 32913XU?
32913XU is a metric 4T tapered roller bearing to ISO 355: 65 mm bore, 90 mm outside diameter and 17 mm assembled width T (2.559 × 3.543 × 0.669 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 53.5 kN, C0 85 kN, Pu 10.4 kN, grease limiting speed 3,700 r/min, oil speed 4,900 r/min, mass about 315 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32913XU?
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 (32913XU); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32913XU designation encode the 65 mm bore and what is 2BC?
last two digits 13 are the ISO bore code, ×5 = 65 mm (codes 00–03 use the 10/12/15/17 exception table). The 90 mm OD and 17 mm assembled T follow the ISO 355 dimension-series plan. 2BC 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 32913XU list two speeds, 3,700 and 4,900 r/min?
The lower figure, 3,700 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32913XU at 4,900 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32913XU mean?
Suffix reading on 32913XU: 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.