C2208-TN9 bearing: complete specifications & equivalents
The C2208-TN9 is a ISO 15 radial bearing sized 40 x 80 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 | 40 mm |
| Outer diameter D | 80 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 | 90 kN |
| Basic static load rating C0 | 86.5 kN |
| Fatigue load limit Pu | 10.2 kN |
| Reference speed (thermal) | 8000 rpm |
| Limiting speed (mechanical) | 11000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 510 g |
| Manufacturer designation | C 2208 TN9 |
| 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 | 1.575 in |
|---|---|
| Outer diameter D | 3.15 in |
| Width B | 0.906 in |
| ISO bore code | 08 |
| 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) | 3 of 21 |
| Bore above smallest C2200-series size | 10 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2208-KTN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 40×80×23 mm ISO 15 envelope and equivalent catalogue C/C0; C 2208 KTN9 is the 1:12 tapered-bore K TN9 PA66-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| C2208-V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×80×23 mm envelope, but catalogue C/C0 differ between the cylindrical-bore TN9 PA66-caged and cylindrical-bore full-complement V executions (90/86.5 kN vs 102/104 kN) — envelope match, not a load-rating equivalent. |
| 22208 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (40×80×23 mm) SKF spherical roller bearing SKF 22208 E with ratings within 10 % — not a drop-in substitute: SKF 22208 E locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
| 22208-EK | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (40×80×23 mm) SKF spherical roller bearing SKF 22208 EK with ratings within 10 % — not a drop-in substitute: SKF 22208 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 C2208-TN9 model number is decoded
C 2208 TN9 belongs to the CARB family — compact aligning roller bearings: envelope 40×80×23 mm, radial rating 90/86.5 kN C/C0, and no axial-locating function by design. The designation C 2208 TN9 separates into C (CARB), 22 (dimension series), 08 (40 mm bore) and TN9 (cylindrical bore for direct shaft fitting, TN9 glass-fibre PA66 cage); envelope 40×80×23 mm follows the ISO 15 plan. The open execution relies on the housing seals and lubrication system, fed through groove/hole features on the large sizes. Explorer-class heat treatment and the crowned roller profile keep edge stress down when the 40 mm shaft deflects; the 8,000 r/min reference and 11,000 r/min limiting speed are both catalogue values. The 510 g mass over the 40×80×23 mm envelope yields about 2.25 kN dynamic per millimetre of bore — the long toroidal rollers give this family its radial capacity density. Mounting: slide the bearing onto the 40 mm seat or heat it (max 120 °C) and seat it square; never press through the 23 mm roller set, and leave the free-end housing shoulder clear so axial float is unrestricted.
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
- continuous-caster guide rolls and slab-caster segments under heat growth
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
- electrical erosion of raceways on VFD-driven shafts without grounding or insulation
- grease churning and overheating when a high-speed thrust position is over-packed
Selection pitfalls — read before you substitute
- At 40 mm bore the small CARB executions are unusually wide (23 mm) for their 80 mm OD — confirm the housing width before substituting a standard spherical bearing of the same bore.
- Reference and limiting speeds are different limits: the 8,000 r/min reference speed is the thermal criterion under load, the limiting value is the mechanical ceiling; observe the reference under load unless the arrangement calculation says otherwise.
- The quoted 90/86.5 kN ratings belong to this exact execution (C 2208 TN9); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- Envelope-identical spherical roller bearings (same ISO 15 d×D×B) are not drop-in equivalents — they locate the shaft axially, while C 2208 TN9 must float; the two are designed to be used as a pair.
- Never use C 2208 TN9 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.
- The 90/86.5 kN ratings and 510 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
What is the difference between V and TN9 CARB executions?
V is the full-complement execution with no cage — more rollers, higher C (90 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 2208 TN9 is the cylindrical bore for direct shaft fitting, TN9 glass-fibre PA66 cage.
How is C 2208 TN9 mounted?
Slide or heat (max 120 °C) the bearing onto the 40 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 23 mm roller set.
What are the dimensions and ratings of the C 2208 TN9?
A C 2208 TN9 measures 40 mm bore × 80 mm outside diameter × 23 mm width (1.575 × 3.15 × 0.906 in). From SKF catalogue PUB BU/P1 17000: dynamic C 90 kN, static C0 86.5 kN, fatigue limit Pu 10.2 kN, reference speed 8,000 r/min, limiting speed 11,000 r/min, mass about 510 g.
Can a CARB bearing like C 2208 TN9 locate the shaft axially?
No — that is the defining feature. C 2208 TN9 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.
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.