C2212-TN9 bearing: complete specifications & equivalents
The C2212-TN9 is a ISO 15 radial bearing sized 60 x 110 x 28 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 60 mm |
| Outer diameter D | 110 mm |
| Width B | 28 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 143 kN |
| Basic static load rating C0 | 156 kN |
| Fatigue load limit Pu | 18.3 kN |
| Reference speed (thermal) | 5600 rpm |
| Limiting speed (mechanical) | 7500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1100 g |
| Manufacturer designation | C 2212 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 | 2.362 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.102 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 25 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) | 7 of 21 |
| Bore above smallest C2200-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2212-KTN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 60×110×28 mm ISO 15 envelope and equivalent catalogue C/C0; C 2212 KTN9 is the 1:12 tapered-bore K TN9 PA66-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| C2212-V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×110×28 mm envelope, but catalogue C/C0 differ between the cylindrical-bore TN9 PA66-caged and cylindrical-bore full-complement V executions (143/156 kN vs 166/190 kN) — envelope match, not a load-rating equivalent. |
| C2212-KV | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×110×28 mm envelope, but catalogue C/C0 differ between the cylindrical-bore TN9 PA66-caged and 1:12 tapered-bore K full-complement V executions (143/156 kN vs 166/190 kN) — envelope match, not a load-rating equivalent. |
| 22212 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×110×28 mm envelope as the SKF spherical roller bearing SKF 22212 E, but catalogue C/C0 differ (143/156 kN vs 159/166 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
| 22212-EK | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×110×28 mm envelope as the SKF spherical roller bearing SKF 22212 EK, but catalogue C/C0 differ (143/156 kN vs 159/166 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 C2212-TN9 model number is decoded
For long shafts that grow thermally, SKF supplies C 2212 TN9: the toroidal rollers allow the 60 mm inner ring to displace axially without induced thrust, while still accommodating shaft deflection like a spherical bearing. SKF builds the CARB order number from size plus execution: the bare number C 2212 is the steel-caged cylindrical-bore bearing, K (or K30) makes the bore tapered for sleeve mounting, and the cage/seal letters follow — here TN9. 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 60 mm shaft deflects; the 5,600 r/min reference and 7,500 r/min limiting speed are both catalogue values. Selection arithmetic: C 143 kN against C0 156 kN gives a C0/C ratio of 1.09, and the 18.3 kN fatigue load limit Pu sets the contamination-adjusted life floor. Mounting: slide the bearing onto the 60 mm seat or heat it (max 120 °C) and seat it square; never press through the 28 mm roller set, and leave the free-end housing shoulder clear so axial float is unrestricted.
Typical equipment & failure modes
Common applications
- 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
- vibrating screen exciters fitted with the VE240 tolerance execution
Known failure patterns
- roller-end and flange smearing after lubricant starvation at the long roller contacts
- thermal preloading when a shaft is located at both ends and growth has nowhere to go
- 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
- oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips
Selection pitfalls — read before you substitute
- At 60 mm bore the small CARB executions are unusually wide (28 mm) for their 110 mm OD — confirm the housing width before substituting a standard spherical bearing of the same bore.
- Tapered-bore K executions mount on adapter sleeves (1:12) and K30 on withdrawal sleeves (1:30) — the 60 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- Reference and limiting speeds are different limits: the 5,600 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.
- Never use C 2212 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 quoted 143/156 kN ratings belong to this exact execution (C 2212 TN9); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- The 143/156 kN ratings and 1100 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
Which dimensions does the C 2212 TN9 have?
A C 2212 TN9 measures 60 mm bore × 110 mm outside diameter × 28 mm width (2.362 × 4.331 × 1.102 in). From SKF catalogue PUB BU/P1 17000: dynamic C 143 kN, static C0 156 kN, fatigue limit Pu 18.3 kN, reference speed 5,600 r/min, limiting speed 7,500 r/min, mass about 1100 g.
What does C 2212 TN9 mean in SKF part numbering?
C marks CARB; 22 the dimension series; the size code gives 60 mm bore; TN9 is the execution (cylindrical bore for direct shaft fitting, TN9 glass-fibre PA66 cage). The envelope follows ISO 15 and matches spherical roller bearing outlines, but the functions differ.
Why is C 2212 TN9 used opposite a spherical roller bearing?
The spherical bearing locates the shaft and takes thrust; the CARB bearing at the other end self-aligns but floats, absorbing thermal expansion without inducing axial load. The pair is standard on paper machine drying cylinders and long caster rolls.
Is the C 2212 TN9 sealed?
No, it is an open execution relying on the housing seals; relubrication follows the groove/hole features of the size.
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.