C2212-KTN9 bearing: complete specifications & equivalents
The C2212-KTN9 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 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 | 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-TN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 60×110×28 mm ISO 15 envelope and equivalent catalogue C/C0; C 2212 TN9 is the cylindrical-bore 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 1:12 tapered-bore K 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 1:12 tapered-bore K 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-KTN9 model number is decoded
C 2212 KTN9 is a CARB toroidal roller bearing to ISO 15: a single row of long, symmetrical barrel-shaped rollers between guide flanges, sized 60×110×28 mm, as listed in SKF catalogue PUB BU/P1 17000 ch. 10.1. The designation C 2212 KTN9 separates into C (CARB), 22 (dimension series), 12 (60 mm bore) and KTN9 (tapered 1:12 bore for adapter (H) sleeve mounting, TN9 glass-fibre PA66 cage); envelope 60×110×28 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 60 mm seat. 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 2212 KTN9 deliberately carries none. Seat tolerances follow the ISO 15 recommendation for the normal-load position — the 110 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
- 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
- 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
- rolling-contact fatigue spalling after the catalogue L10 life is exhausted
- 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.
- 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 2212 KTN9 must float; the two are designed to be used as a pair.
- The quoted 143/156 kN ratings belong to this exact execution (C 2212 KTN9); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- Never use C 2212 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.
- 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
What are the dimensions and ratings of the C 2212 KTN9?
A C 2212 KTN9 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.
Can a CARB bearing like C 2212 KTN9 locate the shaft axially?
No — that is the defining feature. C 2212 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 2212 KTN9 designation read?
C = CARB toroidal family; 22 = dimension series; 12 = 60 mm bore (code 12 × 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 (143 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 2212 KTN9 is the tapered 1:12 bore for adapter (H) sleeve mounting, TN9 glass-fibre PA66 cage.
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.