32007X bearing: complete specifications & equivalents
The 32007X is a ISO 355 radial bearing sized 35 x 62 x 18 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 35 mm |
| Outer diameter D | 62 mm |
| Width B | 18 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 46 kN |
| Basic static load rating C0 | 52.5 kN |
| Limiting speed (mechanical) | 6100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 223 g |
| Manufacturer designation | NTN 32007X |
| 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 | 1.378 in |
|---|---|
| Outer diameter D | 2.441 in |
| Width B | 0.709 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 13.5 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) | 7 of 43 |
| Bore above smallest 32000-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32007X-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 32007X model number is decoded
The NTN 2203E table prints 32007X in the low-section 32000 family tuned for low friction: 35 mm bore, 62 mm cup OD, 18 mm T, with a grease limiting speed of 6,100 r/min and an oil-lubricated ceiling of 8,100 r/min. Digit by digit, the bare number identifies the low-section 32000 family tuned for low friction and a bore code resolving to 35 mm; 62 mm OD and 18 mm assembled T are the matching ISO 355 boundary dimensions shared with other makers of the same dimension series. A tapered roller bearing reacts combined radial and one-direction axial load; NTN mounts 32007X cone and cup separately and adjusts end play or preload against a second bearing, so the arrangement locates the shaft in both directions. Grease relubrication at 6,100 r/min limiting speed targets the rib contact; if the drive needs 8,100 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 32007X washes out and the rib/roller-end contact smears on the first wet or dusty shift.
Typical equipment & failure modes
Common applications
- axle final-drive and differential positions
- construction-equipment wheel and pivot hubs
- truck and bus wheel hubs in paired arrangements
- industrial gearbox and speed-reducer 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
- cage damage from a mounting blow delivered through the roller complement instead of the ring face
- false brinelling on a stationary paired set exposed to external vibration
Selection pitfalls — read before you substitute
- Hub and pinion bearings of this 35 mm bore class are commonly adjusted in pairs; verify end play against the axle drawing and re-torque after bedding-in rather than trusting the initial preload on 32007X.
- The thin 18 mm section of 32007X is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 35 mm bore smears the roller ends against the rib.
- Grease packs must leave free volume in the 18 mm-wide set; over-greasing a paired bearing churning at the 8,100 r/min oil-band speed raises temperature and destroys the preload setting.
- Replacing one half of an adjusted pair without resetting end play negates the 18 mm T dimension logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- Do not confuse T (18 mm assembled width of cone + cup) with the cone width when drawing spacers; an abutment sized to T instead of the ring width leaves the cup unseated.
- The 46/52.5 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32007X (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 32007X?
32007X is a metric 4T tapered roller bearing to ISO 355: 35 mm bore, 62 mm outside diameter and 18 mm assembled width T (1.378 × 2.441 × 0.709 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 46 kN, C0 52.5 kN (2203E prints no Pu for this size), grease limiting speed 6,100 r/min, oil speed 8,100 r/min, mass about 223 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32007X?
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 (32007X); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32007X designation encode the 35 mm bore and what is 4CC?
last two digits 07 are the ISO bore code, ×5 = 35 mm (codes 00–03 use the 10/12/15/17 exception table). The 62 mm OD and 18 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 32007X list two speeds, 6,100 and 8,100 r/min?
The lower figure, 6,100 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32007X at 8,100 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32007X mean?
Suffix reading on 32007X: 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.