C2206-KTN9-H306-E bearing: complete specifications & equivalents
The C2206-KTN9-H306-E is a ISO 15 radial bearing sized 25 x 62 x 20 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 25 mm |
| Outer diameter D | 62 mm |
| Width B | 20 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 69.5 kN |
| Basic static load rating C0 | 62 kN |
| Fatigue load limit Pu | 7.2 kN |
| Reference speed (thermal) | 11000 rpm |
| Limiting speed (mechanical) | 15000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 370 g |
| Manufacturer designation | SKF C 2206 KTN9 + H 306 E |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves |
| Last verified | 2026-09-29 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves) · extracted 2026-09-29
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & carb-adapter-sleeve range
| Bore d | 0.984 in |
|---|---|
| Outer diameter D | 2.441 in |
| Width B | 0.787 in |
| ISO bore code | 06 |
| Radial section height (D−d)/2 | 18.5 mm |
| Smallest bore in carb-adapter-sleeve | 25 mm |
| Largest outer diameter in carb-adapter-sleeve | 1580 mm |
| Width range across carb-adapter-sleeve | 20–462 mm |
| Bore position in carb-adapter-sleeve (smallest first) | 1 of 51 |
| Bore above smallest carb-adapter-sleeve size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2206 | 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 C2206-KTN9-H306-E model number is decoded
What the H execution changes: an adapter sleeve clamps the 30 mm tapered bore onto a plain 25 mm shaft, so the housing-side location work happens at the sleeve locknut — no machined shaft shoulder is needed at the bearing seat. With a combined mass of 0.4 kg over the 25×62×20 mm principal plan, the unit replaces a machined shoulder seat — the mass difference against the bare bearing is the sleeve steel, priced into the one order number. The locknut torque of H 306 E sets the sleeve travel; use the SKF procedure (measure clearance reduction, not torque feel) — over-driving the sleeve preloads the 30 mm CARB bearing and overheats the unit within hours. Housing side of C2206-KTN9-H306-E is conventional: a 62 mm H7 bore takes the CARB outer ring, which is free to slide axially in the housing — the toroidal raceway handles the misalignment and the sleeve side handles the location on the 25 mm shaft.SKF C 2206 KTN9 + H 306 E is the SKF catalogue designation for a CARB toroidal roller bearing delivered on a sleeve: bearing C 2206 KTN9, adapter sleeve H 306 E, fitting a 25 mm cylindrical shaft seat at 62 mm housing diameter.Numbering logic: the bearing half C 2206 KTN9 follows the CARB works numbering (type C, dimension series, 30 mm bore), while H 306 E identifies the sleeve execution for that bore; the combo C2206-KTN9-H306-E exists in the catalogue so that shaft (25 mm), housing (62 mm) and both components are specified with one order number.
Typical equipment & failure modes
Common applications
- heavy industrial gearbox layshafts used as the non-locating position
- winder and reel drums in paper and steel strip plants
- paper machine drying cylinders and calender rolls with long, thermally expanding shafts
- vibrating screen exciters fitted with the VE240 tolerance execution
Known failure patterns
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
Selection pitfalls — read before you substitute
- Do not re-use a sleeve that shows taper scuffing: a scratched cone changes the travel-to-clearance relationship of the whole C2206-KTN9-H306-E unit — replace the sleeve with the bearing.
- Contamination discipline: the CARB bearing is open (this execution has no seals); flush the housing before mounting C2206-KTN9-H306-E and maintain the lubricant filtration — hard particles indent the toroidal raceway quickly at heavy load.
- Never set C2206-KTN9-H306-E by locknut torque or "feel": the adapter sleeve travel defines the clearance of the 30 mm CARB bearing — measure residual radial clearance during mounting, in steps.
- The 69.5/62 kN ratings are SKF catalogue 17000 values for the CARB bearing; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification.
- Quote the full unit designation SKF C 2206 KTN9 + H 306 E when purchasing — bearing and sleeve execution letters are part of the order number and define the matched taper pair.
Frequently asked questions
What are the dimensions and catalogue data of C2206-KTN9-H306-E?
The unit is CARB bearing C 2206 KTN9 on adapter sleeve H 306 E, fitting a 25 mm shaft (0.984 in), housing bore 62 mm, bearing width 20 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 69.5 kN, C0 62 kN, fatigue load limit Pu 7.2 kN, combined mass about 0.4 kg. Reference speed 11,000 r/min, limiting speed 15,000 r/min (bearing values).
Why does C2206-KTN9-H306-E list a 25 mm shaft size when the bearing bore is 30 mm?
The sleeve takes up the difference: the adapter sleeve H 306 E has a tapered outside that engages the bearing's 30 mm tapered bore and a cylindrical bore that seats on the 25 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C2206-KTN9-H306-E a locating or non-locating bearing?
Non-locating. The CARB toroidal roller bearing is designed as the free end of the shaft: its raceway geometry tolerates misalignment and allows axial float, while a separate locating bearing (typically a spherical roller or paired taper) takes the thrust. The sleeve does not change this function.
Can I buy the bearing C 2206 KTN9 and the sleeve H 306 E separately?
The components are catalogued separately, but the taper pair is matched — the sleeve seat and the bearing bore are manufactured to the same execution. Ordering the unit C2206-KTN9-H306-E as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C2206-KTN9-H306-E set at mounting?
By driving the adapter sleeve up its conical seat: the sleeve expands on the 25 mm shaft and onto the bearing bore, reducing the radial internal clearance. Mount in steps and measure residual clearance until it reaches the catalogue value for the K bore — never set it by nut torque alone.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves on 2026-09-29. Read our editorial & correction policy.