32206-NTN bearing: complete specifications & equivalents
The 32206-NTN 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 | 60.5 kN |
| Basic static load rating C0 | 64 kN |
| Limiting speed (mechanical) | 6300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 299 g |
| Manufacturer designation | NTN 32206 |
| 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 | 06 |
| 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 |
|---|---|---|---|
| 32206 | 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. |
| 32206-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. |
| 32206-SKF | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 30×62×21.25 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 32206-NTN model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the NTN order number 32206 denotes the heavy-section 32200 family of metric tapered roller bearings, 30 mm bore, 62 mm outside diameter and 21.25 mm assembled width T (1.181 × 2.441 × 0.837 in) to the ISO 355 boundary plan. NTN also quotes this bearing with its ISO 355 dimension-series abbreviation, 3DC, which is the maker-neutral cross-reference for the 30×62 mm envelope; 4T is NTN's own tapered-roller brand mark on the parts. At 60.5 kN C the bearing offers about 2.0 kN of dynamic capacity per millimetre of the 30 mm bore — compare any substitution on this ratio and the 21.25 mm assembled T, not on bore alone. Selection: C 60.5 kN against C0 64 kN gives a C0/C ratio of 1.06 for the 30 mm bore, and the equivalent combined load must keep below the rating at the target L10 with the pair counted as one unit. When pairing 32206 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
- 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
- false brinelling on a stationary paired set exposed to external vibration
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 32206.
- 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 8,400 r/min oil ceiling.
- Minimum load matters at high speed: an unloaded 32206 at a large fraction of 6,300 r/min lets rollers skid and smear the cone rib; spring-preload lightly loaded pair arrangements.
- The 16.0 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 32206 or the ring will bottom out on the radius instead of the shoulder face.
- Open 32206 units have no seals: a wheel-hub or gearbox application needs external sealing or the 6,300 r/min grease figure is meaningless once water reaches the cone rib.
- The 60.5/64 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 32206 (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 32206?
32206 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 60.5 kN, C0 64 kN (2203E prints no Pu for this size), grease limiting speed 6,300 r/min, oil speed 8,400 r/min, mass about 299 g. It is an open, separable cone/cup bearing with a pressed-steel cage.
What does the 4T prefix mean on 32206?
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 (32206); the lower-case 4t- factory spelling of the code is retained among the search aliases.
How does the 32206 designation encode the 30 mm bore and what is 3DC?
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. 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 32206 list two speeds, 6,300 and 8,400 r/min?
The lower figure, 6,300 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 32206 at 8,400 r/min because oil removes rib-contact heat better. Real limits still depend on preload, oil flow and cooling.
What does the suffix on 32206 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.