32014X bearing: complete specifications & equivalents
The 32014X is a ISO 355 radial bearing sized 70 x 110 x 25 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 70 mm |
| Outer diameter D | 110 mm |
| Width B | 25 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 116 kN |
| Basic static load rating C0 | 160 kN |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 863 g |
| Manufacturer designation | NTN 32014X |
| 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 | 2.756 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 0.984 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 20 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) | 14 of 43 |
| Bore above smallest 32000-series size | 50 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32014X-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 32014X model number is decoded
The NTN 2203E table prints 32014X in the low-section 32000 family tuned for low friction: 70 mm bore, 110 mm cup OD, 25 mm T, with a grease limiting speed of 3,200 r/min and an oil-lubricated ceiling of 4,200 r/min. Reading the designation: the leading five digits follow the ISO 355 metric plan (dimension family plus two-digit bore code), and 32014X resolves to 70 mm bore; the NTN factory mark 4T is stamped on cone and cup but is a brand mark, not a size code, so the catalogue sku is printed without it. Individually mounted, 32014X 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. Catalogue mass of the 32014X set is 863 g (0.034 lb cone + cup); abutment and shaft shoulder design must carry that mass square to the axis. Open 4T bearings need application seals; without them the grease at the cone rib of 32014X washes out and the rib/roller-end contact smears on the first wet or dusty shift.
Typical equipment & failure modes
Common applications
- large agricultural and forestry machine axles
- heavy industrial gearboxes and crane travel drives
- rolling-mill auxiliary and pinion-stand shafts
- large conveyor and bucket-elevator pulleys
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
- 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 70 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 863 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
- The thin 25 mm section of 32014X is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 70 mm bore smears the roller ends against the rib.
- Never fit the 70 mm cone by hammering the 110 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 20.0 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 32014X or the ring will bottom out on the radius instead of the shoulder face.
- Never fit the 70 mm cone by hammering the 110 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 116/160 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32014X (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 32014X?
32014X is a metric 4T tapered roller bearing to ISO 355: 70 mm bore, 110 mm outside diameter and 25 mm assembled width T (2.756 × 4.331 × 0.984 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 116 kN, C0 160 kN (2203E prints no Pu for this size), grease limiting speed 3,200 r/min, oil speed 4,200 r/min, mass about 863 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32014X?
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 (32014X); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32014X designation encode the 70 mm bore and what is 4CC?
last two digits 14 are the ISO bore code, ×5 = 70 mm (codes 00–03 use the 10/12/15/17 exception table). The 110 mm OD and 25 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 32014X list two speeds, 3,200 and 4,200 r/min?
The lower figure, 3,200 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32014X at 4,200 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32014X mean?
Suffix reading on 32014X: 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.