32005X bearing: complete specifications & equivalents
The 32005X is a ISO 355 radial bearing sized 25 x 47 x 15 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 25 mm |
| Outer diameter D | 47 mm |
| Width B | 15 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 31 kN |
| Basic static load rating C0 | 33.5 kN |
| Limiting speed (mechanical) | 7900 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 113 g |
| Manufacturer designation | NTN 32005X |
| 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 | 0.984 in |
|---|---|
| Outer diameter D | 1.85 in |
| Width B | 0.591 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 11 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) | 3 of 43 |
| Bore above smallest 32000-series size | 5 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32005X | 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 32005X model number is decoded
For a 25 mm shaft with a thrust component, NTN lists 32005X, a metric 4T tapered roller bearing of 31 kN C and 33.5 kN C0 inside the 47 mm OD, 15 mm-wide assembled set. Reading the designation: the leading five digits follow the ISO 355 metric plan (dimension family plus two-digit bore code), and 32005X resolves to 25 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. The 11.0 mm radial section carries the roller complement across the 25–47 mm envelope; section and contact angle differ between NTN metric families even at the same bore, so 302/322/323 are not drop-in swaps. Catalogue mass of the 32005X set is 113 g (0.004 lb cone + cup); abutment and shaft shoulder design must carry that mass square to the axis. With a rotating shaft a k5/m5 shaft seat and a press-fit cup are typical catalogue practice for 32005X; reverse the logic if the cup rotates, and re-verify against load direction and magnitude.
Typical equipment & failure modes
Common applications
- small gearbox input shafts with combined load
- scooter and light-powersport wheel and gear positions
- small conveyor pulley shafts
- steering-knuckle and kingpin positions
Known failure patterns
- cone-raceway spalling at the large rib when preload is set too high for the lubricant film
- smearing on the roller large ends and cone rib after a dry start with preload but no oil film
- flaking on one cone only when a back-to-back / face-to-face pair is loaded unevenly by a bent shaft
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- edge loading when shaft deflection exceeds the few arc-minutes of misalignment the adjusted pair allows
Selection pitfalls — read before you substitute
- At 25 mm bore the thin section and small rollers are adjustment-sensitive: a quarter-turn of the locknut moves end play by more than on large bearings, so set the 32005X pair with a dial indicator rather than by feel.
- The thin 15 mm section of 32005X is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 25 mm bore smears the roller ends against the rib.
- ISO 355 makes the 25×47 mm envelope interchangeable but not the ratings: NTN prints 31/33.5 kN for this execution, and a cheaper same-number part can differ in roller complement and steel.
- ISO 355 makes the 25×47 mm envelope interchangeable but not the ratings: NTN prints 31/33.5 kN for this execution, and a cheaper same-number part can differ in roller complement and steel.
- The U/UTG/X/C/CA/D suffix variants of a base number share the bore but not the article: ordering 32005X by size alone can deliver the wrong contact-angle execution for a pinion position.
- The 31/33.5 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32005X (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 32005X?
32005X is a metric 4T tapered roller bearing to ISO 355: 25 mm bore, 47 mm outside diameter and 15 mm assembled width T (0.984 × 1.85 × 0.591 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 31 kN, C0 33.5 kN (2203E prints no Pu for this size), grease limiting speed 7,900 r/min, oil speed 11,000 r/min, mass about 113 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32005X?
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 (32005X); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32005X designation encode the 25 mm bore and what is 4CC?
last two digits 05 are the ISO bore code, ×5 = 25 mm (codes 00–03 use the 10/12/15/17 exception table). The 47 mm OD and 15 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 32005X list two speeds, 7,900 and 11,000 r/min?
The lower figure, 7,900 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32005X at 11,000 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32005X mean?
Suffix reading on 32005X: 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.