C2207-KTN9 bearing: complete specifications & equivalents
The C2207-KTN9 is a ISO 15 radial bearing sized 35 x 72 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 | 35 mm |
| Outer diameter D | 72 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 | 83 kN |
| Basic static load rating C0 | 80 kN |
| Fatigue load limit Pu | 9.3 kN |
| Reference speed (thermal) | 9500 rpm |
| Limiting speed (mechanical) | 13000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 440 g |
| Manufacturer designation | C 2207 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 | 1.378 in |
|---|---|
| Outer diameter D | 2.835 in |
| Width B | 0.906 in |
| ISO bore code | 07 |
| Radial section height (D−d)/2 | 18.5 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) | 2 of 21 |
| Bore above smallest C2200-series size | 5 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2207-TN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 35×72×23 mm ISO 15 envelope and equivalent catalogue C/C0; C 2207 TN9 is the cylindrical-bore TN9 PA66-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| C2207-V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×72×23 mm envelope, but catalogue C/C0 differ between the 1:12 tapered-bore K TN9 PA66-caged and cylindrical-bore full-complement V executions (83/80 kN vs 95/96 kN) — envelope match, not a load-rating equivalent. |
| 22207 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (35×72×23 mm) SKF spherical roller bearing SKF 22207 E with ratings within 10 % — not a drop-in substitute: SKF 22207 E locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
| 22207-EK | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (35×72×23 mm) SKF spherical roller bearing SKF 22207 EK with ratings within 10 % — not a drop-in substitute: SKF 22207 EK locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
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 C2207-KTN9 model number is decoded
C 2207 KTN9 is the dimension series 22 CARB toroidal roller bearings member of the CARB range: 35 mm bore, 72 mm OD, 23 mm width, with the asymmetrical-looking toroidal roller set that defines the CARB principle. The designation C 2207 KTN9 separates into C (CARB), 22 (dimension series), 07 (35 mm bore) and KTN9 (tapered 1:12 bore for adapter (H) sleeve mounting, TN9 glass-fibre PA66 cage); envelope 35×72×23 mm follows the ISO 15 plan. CARB bearings locate neither radially nor axially: the inner ring can walk axially inside the outer ring over the catalogue-listed axial-displacement range (s), so shaft thermal growth disappears as thrust rather than preloading the 35 mm seat. Selection arithmetic: C 83 kN against C0 80 kN gives a C0/C ratio of 0.96, and the 9.3 kN fatigue load limit Pu sets the contamination-adjusted life floor. Seat tolerances follow the ISO 15 recommendation for the normal-load position — the 72 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
- edge loading and premature spalling when the CARB position is blocked from its designed axial float
- PA66 cage (TN9) softening when the sustained temperature passes the polymer limit
- false brinelling and rust-red witness marks on standby machines under external vibration
- grease churning and overheating when a high-speed thrust position is over-packed
Selection pitfalls — read before you substitute
- At 35 mm bore the small CARB executions are unusually wide (23 mm) for their 72 mm OD — confirm the housing width before substituting a standard spherical bearing of the same bore.
- Never use C 2207 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 35 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- The quoted 83/80 kN ratings belong to this exact execution (C 2207 KTN9); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- 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.
- The 83/80 kN ratings and 440 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
How is the C 2207 KTN9 designation read?
C = CARB toroidal family; 22 = dimension series; 07 = 35 mm bore (code 07 × 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 (83 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 2207 KTN9 is the tapered 1:12 bore for adapter (H) sleeve mounting, TN9 glass-fibre PA66 cage.
How is C 2207 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.
What are the dimensions and ratings of the C 2207 KTN9?
A C 2207 KTN9 measures 35 mm bore × 72 mm outside diameter × 23 mm width (1.378 × 2.835 × 0.906 in). From SKF catalogue PUB BU/P1 17000: dynamic C 83 kN, static C0 80 kN, fatigue limit Pu 9.3 kN, reference speed 9,500 r/min, limiting speed 13,000 r/min, mass about 440 g.
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.