32207C bearing: complete specifications & equivalents
The 32207C 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 | 75.5 kN |
| Basic static load rating C0 | 85.5 kN |
| Limiting speed (mechanical) | 5300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 461 g |
| Manufacturer designation | NTN 32207C |
| 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 | — |
| 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 |
|---|---|---|---|
| 32207C | 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 32207C model number is decoded
32207C is a metric single-row tapered roller bearing in the NTN 4T programme: a pressed-steel cage guides profiled rollers between a separable cone and cup on the 35×72 mm ISO 355 envelope, with 24.25 mm overall assembled width T. Digit by digit, the bare number identifies the heavy-section 32200 family and a bore code resolving to 35 mm; 72 mm OD and 24.25 mm assembled T are the matching ISO 355 boundary dimensions shared with other makers of the same dimension series. Individually mounted, 32207C 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. Imperial cross-check for the drawing: 35×72×24.25 mm is 1.378 × 2.835 × 0.955 in; ISO 355 makes the envelope interchangeable but C/C0, 75.5/85.5 kN, is NTN-specific. Fillet radii must clear the ring chamfers of the 72 mm cup and 35 mm cone; use undercut shoulders so the rings seat fully rather than bridging on a shaft radius.
Typical equipment & failure modes
Common applications
- machine-tool gearbox and headstock shafts
- axle final-drive and differential positions
- construction-equipment wheel and pivot hubs
- truck and bus wheel hubs in paired arrangements
Known failure patterns
- cup creep and housing fretting when the specified outer-ring press fit is not achieved
- preload loss from racewear when one bearing of the paired set is replaced without re-adjusting end play
- rib scoring when axial load is carried beyond the cone rib capacity of the adjusted pair
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- rolling-contact fatigue after the catalogue L10 life at the actual combined load
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 32207C.
- 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 7,100 r/min oil ceiling.
- Replacing one half of an adjusted pair without resetting end play negates the 24.25 mm T dimension logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
- Grease packs must leave free volume in the 24.25 mm-wide set; over-greasing a paired bearing churning at the 7,100 r/min oil-band speed raises temperature and destroys the preload setting.
- Never fit the 35 mm cone by hammering the 72 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 75.5/85.5 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32207C (ISO 355 5DC); 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 32207C?
32207C 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 75.5 kN, C0 85.5 kN (2203E prints no Pu for this size), grease limiting speed 5,300 r/min, oil speed 7,100 r/min, mass about 461 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32207C?
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 (32207C); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32207C designation encode the 35 mm bore and what is 5DC?
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. 5DC 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 32207C list two speeds, 5,300 and 7,100 r/min?
The lower figure, 5,300 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32207C at 7,100 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32207C mean?
Suffix reading on 32207C: the trailing A/C/D (or E1) letter marks an NTN contact-angle or internal-design revision of the base number, not a seal or clearance code; 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.