C2209-KTN9 bearing: complete specifications & equivalents
The C2209-KTN9 is a ISO 15 radial bearing sized 45 x 85 x 23 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 45 mm |
| Outer diameter D | 85 mm |
| Width B | 23 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 93 kN |
| Basic static load rating C0 | 93 kN |
| Fatigue load limit Pu | 10.8 kN |
| Reference speed (thermal) | 7500 rpm |
| Limiting speed (mechanical) | 11000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 560 g |
| Manufacturer designation | C 2209 KTN9 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.1 CARB toroidal roller bearings |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.1 CARB toroidal roller bearings) · extracted 2026-09-27
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.1 CARB toroidal roller bearings); 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 & C2200-series range
| Bore d | 1.772 in |
|---|---|
| Outer diameter D | 3.346 in |
| Width B | 0.906 in |
| ISO bore code | 09 |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in C2200-series | 30 mm |
| Largest outer diameter in C2200-series | 400 mm |
| Width range across C2200-series | 20–108 mm |
| Bore position in C2200-series (smallest first) | 4 of 21 |
| Bore above smallest C2200-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2209-TN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 45×85×23 mm ISO 15 envelope and equivalent catalogue C/C0; C 2209 TN9 is the cylindrical-bore TN9 PA66-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| C2209-V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×23 mm envelope, but catalogue C/C0 differ between the 1:12 tapered-bore K TN9 PA66-caged and cylindrical-bore full-complement V executions (93/93 kN vs 106/110 kN) — envelope match, not a load-rating equivalent. |
| 22209 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×23 mm envelope as the SKF spherical roller bearing SKF 22209 E, but catalogue C/C0 differ (93/93 kN vs 104/98 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
| 22209-EK | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×23 mm envelope as the SKF spherical roller bearing SKF 22209 EK, but catalogue C/C0 differ (93/93 kN vs 104/98 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
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 C2209-KTN9 model number is decoded
The CARB bearing C 2209 KTN9 combines the self-aligning behaviour of a spherical roller bearing with the axial freedom of a cylindrical bearing in one 45 mm bore, 85 mm outside diameter, 23 mm wide unit rated 93 kN dynamic. The designation C 2209 KTN9 separates into C (CARB), 22 (dimension series), 09 (45 mm bore) and KTN9 (tapered 1:12 bore for adapter (H) sleeve mounting, TN9 glass-fibre PA66 cage); envelope 45×85×23 mm follows the ISO 15 plan. The K suffix gives a 1:12 tapered 45 mm bore, mounted on an adapter (H) sleeve so the bearing can be driven up to the specified clearance. The same size is listed in both bore executions, and the boundary dimensions 45×85×23 mm are identical — only the mounting method changes. Pairing rule: use the CARB bearing opposite one locating spherical or tapered bearing — never at both shaft ends — and check the locating bearing takes 100 % of the thrust, since C 2209 KTN9 deliberately carries none. Seat tolerances follow the ISO 15 recommendation for the normal-load position — the 85 mm outer ring typically takes a loose housing fit to preserve float, and the rings must be supported across their full faces.
Typical equipment & failure modes
Common applications
- paper machine drying cylinders and calender rolls with long, thermally expanding shafts
- continuous-caster guide rolls and slab-caster segments under heat growth
- vibrating screen exciters fitted with the VE240 tolerance execution
- long fan and kiln main shafts where the free end must float without thrust load
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after sustained overload
- roller skew and cage damage after the bearing is clamped solid between shaft and housing shoulders
- brass cage pocket wear under marginal lubrication in the large-bore M/MB executions
- false brinelling and rust-red witness marks on standby machines under external vibration
- oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips
Selection pitfalls — read before you substitute
- At 45 mm bore the small CARB executions are unusually wide (23 mm) for their 85 mm OD — confirm the housing width before substituting a standard spherical bearing of the same bore.
- Do not block the axial displacement in the drawing: housing covers, labyrinth rings and snap rings must leave the catalogue float (s) free, or the bearing silently becomes a poorly located fixed bearing.
- Envelope-identical spherical roller bearings (same ISO 15 d×D×B) are not drop-in equivalents — they locate the shaft axially, while C 2209 KTN9 must float; the two are designed to be used as a pair.
- Never use C 2209 KTN9 as the locating bearing: it carries no axial load by design — the arrangement needs a separate locating spherical, tapered or angular bearing facing the thrust.
- Tapered-bore K executions mount on adapter sleeves (1:12) and K30 on withdrawal sleeves (1:30) — the 45 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- The 93/93 kN ratings and 560 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 858); mounting data — axial displacement (s) and seating details — appears in the running text because the structured record carries the boundary envelope only.
Frequently asked questions
Can a CARB bearing like C 2209 KTN9 locate the shaft axially?
No — that is the defining feature. C 2209 KTN9 deliberately allows the inner ring to float axially inside the outer ring while the toroidal rollers self-align. It must be paired with a separate locating bearing (spherical, tapered or angular contact) that takes 100 % of the thrust.
How is the C 2209 KTN9 designation read?
C = CARB toroidal family; 22 = dimension series; 09 = 45 mm bore (code 09 × 5); suffix KTN9 selects tapered 1:12 bore for adapter (H) sleeve mounting, TN9 glass-fibre PA66 cage. K is a 1:12 tapered bore for an adapter sleeve, K30 a 1:30 bore for a withdrawal sleeve.
What is the difference between V and TN9 CARB executions?
V is the full-complement execution with no cage — more rollers, higher C (93 kN here) but a lower speed ceiling and no thermal reference speed. TN9 is the glass-fibre PA66 caged execution, faster and quieter at somewhat lower load. C 2209 KTN9 is the tapered 1:12 bore for adapter (H) sleeve mounting, TN9 glass-fibre PA66 cage.
How is C 2209 KTN9 mounted?
The tapered 1:12 bore mounts on an adapter (H) sleeve with a defined drive-up; heat the bearing to max 120 °C when fitting, support full ring faces, and verify axial float afterwards.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.1 CARB toroidal roller bearings on 2026-09-27. Read our editorial & correction policy.