32207-NTN bearing: complete specifications & equivalents
The 32207-NTN is a ISO 355 radial bearing sized 35 x 72 x 24.25 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 | 72 mm |
| Width B | 24.25 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 80.5 kN |
| Basic static load rating C0 | 87 kN |
| Limiting speed (mechanical) | 5500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 455 g |
| Manufacturer designation | NTN 32207 |
| 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 & 32200-series range
| Bore d | 1.378 in |
|---|---|
| Outer diameter D | 2.835 in |
| Width B | 0.955 in |
| ISO bore code | 07 |
| Radial section height (D−d)/2 | 18.5 mm |
| Smallest bore in 32200-series | 17 mm |
| Largest outer diameter in 32200-series | 580 mm |
| Width range across 32200-series | 17.25–159 mm |
| Bore position in 32200-series (smallest first) | 6 of 36 |
| Bore above smallest 32200-series size | 18 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32207 | FAG | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 32207-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. |
| 32207-SKF | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×72×24.25 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
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 32207-NTN model number is decoded
NTN supplies this 35 mm bore tapered roller position as 32207: one cone assembly, one cup, line-contact rollers and a steel cage, rated 80.5 kN basic dynamic and 87 kN static on the heavy-section 32200 family. The last two digits 07 are the ISO bore code, ×5 = 35 mm (codes 00–03 use the 10/12/15/17 exception table) under the ISO 355 numbering; the 24.25 mm value printed here is T, the width of the fully assembled cone-plus-cup set, not the inner-ring width alone. The 18.5 mm radial section carries the roller complement across the 35–72 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. Speed planning uses both catalogue columns: grease 5,500 r/min is the cage/rib mechanical ceiling for 32207, oil 7,400 r/min is available with circulating oil — a 1,900 r/min margin at this size. When pairing 32207 with a second tapered bearing, keep the matched arrangement clean: a single stray grit particle between cup and housing changes preload faster than the adjustment range can correct.
Typical equipment & failure modes
Common applications
- construction-equipment wheel and pivot hubs
- truck and bus wheel hubs in paired arrangements
- industrial gearbox and speed-reducer shafts
- bevel and helical pinion drives with high thrust component
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- 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
- cage damage from a mounting blow delivered through the roller complement instead of the ring face
- brinell marks on cone and cup raceways from impact during handling or hammering during fitting
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 32207.
- The heavy-section 32200 family at 35 mm bore (72×24.25 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 7,400 r/min oil ceiling.
- The 18.5 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 32207 or the ring will bottom out on the radius instead of the shoulder face.
- ISO 355 makes the 35×72 mm envelope interchangeable but not the ratings: NTN prints 80.5/87 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 32207 by size alone can deliver the wrong contact-angle execution for a pinion position.
- The 80.5/87 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32207 (ISO 355 3DC); 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 32207?
32207 is a metric 4T tapered roller bearing to ISO 355: 35 mm bore, 72 mm outside diameter and 24.25 mm assembled width T (1.378 × 2.835 × 0.955 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 80.5 kN, C0 87 kN (2203E prints no Pu for this size), grease limiting speed 5,500 r/min, oil speed 7,400 r/min, mass about 455 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32207?
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 (32207); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32207 designation encode the 35 mm bore and what is 3DC?
last two digits 07 are the ISO bore code, ×5 = 35 mm (codes 00–03 use the 10/12/15/17 exception table). The 72 mm OD and 24.25 mm assembled T follow the ISO 355 dimension-series plan. 3DC 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 32207 list two speeds, 5,500 and 7,400 r/min?
The lower figure, 5,500 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32207 at 7,400 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32207 mean?
It is the basic open 4T execution — steel cage, adjusted mounting, no seal or feature suffix. NTN uses U for the uprated design, UTG for ULTAGE large-bearing specs, X for the ISO boundary section, and C/CA/D/A for contact-angle or internal-design variants; all are separate order numbers.
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.