32013X bearing: complete specifications & equivalents
The 32013X is a ISO 355 radial bearing sized 65 x 100 x 23 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 | 100 mm |
| Width B | 23 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 92 kN |
| Basic static load rating C0 | 128 kN |
| Limiting speed (mechanical) | 3400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 631 g |
| Manufacturer designation | NTN 32013X |
| 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 | 2.559 in |
|---|---|
| Outer diameter D | 3.937 in |
| Width B | 0.906 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 17.5 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) | 13 of 43 |
| Bore above smallest 32000-series size | 45 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32013X-DF | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | Model-number interchange per ISO 15; confirm dimensions, sealing and ratings in the supplier catalogue. |
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 32013X model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the NTN order number 32013X denotes the low-section 32000 family tuned for low friction of metric tapered roller bearings, 65 mm bore, 100 mm outside diameter and 23 mm assembled width T (2.559 × 3.937 × 0.906 in) to the ISO 355 boundary plan. NTN also quotes this bearing with its ISO 355 dimension-series abbreviation, 4CC, which is the maker-neutral cross-reference for the 65×100 mm envelope; 4T is NTN's own tapered-roller brand mark on the parts. 2203E lists two speed ceilings for 32013X: 3,400 r/min with grease lubrication (the limiting speed) and 4,600 r/min with oil, the higher oil value reflecting better heat removal from the cone rib. 2203E does not print a Pu fatigue load limit for 32013X; life work for this size uses the 92/128 kN C/C0 pair directly. After mounting check the contact pattern with marking blue: a pattern biased to the large or small roller end means the 65 mm pair is misadjusted and the 23 mm T set will edge-load in service.
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
- rib scoring when axial load is carried beyond the cone rib capacity of the adjusted pair
- preload loss from racewear when one bearing of the paired set is replaced without re-adjusting end play
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- indentation of the raceways by hard particles in unsealed open arrangements
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 631 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The thin 23 mm section of 32013X 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 65×100 mm envelope interchangeable but not the ratings: NTN prints 92/128 kN for this execution, and a cheaper same-number part can differ in roller complement and steel.
- Minimum load matters at high speed: an unloaded 32013X at a large fraction of 3,400 r/min lets rollers skid and smear the cone rib; spring-preload lightly loaded pair arrangements.
- Grease packs must leave free volume in the 23 mm-wide set; over-greasing a paired bearing churning at the 4,600 r/min oil-band speed raises temperature and destroys the preload setting.
- The 92/128 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32013X (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 32013X?
32013X is a metric 4T tapered roller bearing to ISO 355: 65 mm bore, 100 mm outside diameter and 23 mm assembled width T (2.559 × 3.937 × 0.906 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 92 kN, C0 128 kN (2203E prints no Pu for this size), grease limiting speed 3,400 r/min, oil speed 4,600 r/min, mass about 631 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32013X?
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 (32013X); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32013X designation encode the 65 mm bore and what is 4CC?
last two digits 13 are the ISO bore code, ×5 = 65 mm (codes 00–03 use the 10/12/15/17 exception table). The 100 mm OD and 23 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 32013X list two speeds, 3,400 and 4,600 r/min?
The lower figure, 3,400 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32013X at 4,600 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32013X mean?
Suffix reading on 32013X: X marks the execution built to the ISO boundary-dimension section (interchangeable envelope, NTN internal geometry); 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.