32206C bearing: complete specifications & equivalents
The 32206C is a ISO 355 radial bearing sized 30 x 62 x 21.25 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 30 mm |
| Outer diameter D | 62 mm |
| Width B | 21.25 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 55.5 kN |
| Basic static load rating C0 | 60 kN |
| Limiting speed (mechanical) | 6100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 297 g |
| Manufacturer designation | NTN 32206C |
| 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 | 1.181 in |
|---|---|
| Outer diameter D | 2.441 in |
| Width B | 0.837 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 16 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) | 5 of 36 |
| Bore above smallest 32200-series size | 13 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32206C | 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 32206C model number is decoded
The NTN 2203E table prints 32206C in the heavy-section 32200 family: 30 mm bore, 62 mm cup OD, 21.25 mm T, with a grease limiting speed of 6,100 r/min and an oil-lubricated ceiling of 8,100 r/min. The last two digits 06 are the ISO bore code, ×5 = 30 mm (codes 00–03 use the 10/12/15/17 exception table) under the ISO 355 numbering; the 21.25 mm value printed here is T, the width of the fully assembled cone-plus-cup set, not the inner-ring width alone. 2203E lists two speed ceilings for 32206C: 6,100 r/min with grease lubrication (the limiting speed) and 8,100 r/min with oil, the higher oil value reflecting better heat removal from the cone rib. The 1.9 kN-per-mm-bore capacity figure for 32206C summarises the 55.5 kN rating over 30 mm bore; use it to sanity-check an interchange candidate before swapping brands. When pairing 32206C 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
- pump and compressor drive shafts carrying combined load
- machine-tool gearbox and headstock shafts
- axle final-drive and differential positions
- construction-equipment wheel and pivot hubs
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
- water-induced pitting when the open bearing is exposed to washdown without external seals
Selection pitfalls — read before you substitute
- Hub and pinion bearings of this 30 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 32206C.
- The heavy-section 32200 family at 30 mm bore (62×21.25 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 8,100 r/min oil ceiling.
- Do not confuse T (21.25 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 U/UTG/X/C/CA/D suffix variants of a base number share the bore but not the article: ordering 32206C by size alone can deliver the wrong contact-angle execution for a pinion position.
- Grease packs must leave free volume in the 21.25 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.
- The 55.5/60 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32206C (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 32206C?
32206C is a metric 4T tapered roller bearing to ISO 355: 30 mm bore, 62 mm outside diameter and 21.25 mm assembled width T (1.181 × 2.441 × 0.837 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 55.5 kN, C0 60 kN (2203E prints no Pu for this size), grease limiting speed 6,100 r/min, oil speed 8,100 r/min, mass about 297 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32206C?
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 (32206C); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32206C designation encode the 30 mm bore and what is 5DC?
last two digits 06 are the ISO bore code, ×5 = 30 mm (codes 00–03 use the 10/12/15/17 exception table). The 62 mm OD and 21.25 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 32206C 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 32206C 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 32206C mean?
Suffix reading on 32206C: 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.