C2228 bearing: complete specifications & equivalents
The C2228 is a ISO 15 radial bearing sized 140 x 250 x 68 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 140 mm |
| Outer diameter D | 250 mm |
| Width B | 68 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 830 kN |
| Basic static load rating C0 | 1060 kN |
| Fatigue load limit Pu | 102 kN |
| Reference speed (thermal) | 2400 rpm |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 14000 g |
| Manufacturer designation | C 2228 |
| 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 | 5.512 in |
|---|---|
| Outer diameter D | 9.843 in |
| Width B | 2.677 in |
| ISO bore code | 28 |
| Radial section height (D−d)/2 | 55 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) | 17 of 21 |
| Bore above smallest C2200-series size | 110 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2228-K | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 140×250×68 mm ISO 15 envelope and equivalent catalogue C/C0; C 2228 K is the 1:12 tapered-bore K steel-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| 22228 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 140×250×68 mm envelope as the SKF spherical roller bearing SKF 22228 CC/W33, but catalogue C/C0 differ (830/1060 kN vs 743/900 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
| 22228-CCK-W33 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 140×250×68 mm envelope as the SKF spherical roller bearing SKF 22228 CCK/W33, but catalogue C/C0 differ (830/1060 kN vs 743/900 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 C2228 model number is decoded
SKF lists C 2228 in the dimension series 22 CARB toroidal roller bearings: the toroidal roller profile both follows tolerates angular misalignment and lets the inner ring slide axially inside the outer ring, giving free axial displacement at the non-locating position. The designation C 2228 separates into C (CARB), 22 (dimension series), 28 (140 mm bore) and the bare number (cylindrical bore for direct shaft fitting, pressed steel cage); envelope 140×250×68 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 140 mm seat. Selection arithmetic: C 830 kN against C0 1060 kN gives a C0/C ratio of 1.28, and the 102 kN fatigue load limit Pu sets the contamination-adjusted life floor. Mounting: slide the bearing onto the 140 mm seat or heat it (max 120 °C) and seat it square; never press through the 68 mm roller set, and leave the free-end housing shoulder clear so axial float is unrestricted.
Typical equipment & failure modes
Common applications
- vibrating screen exciters fitted with the VE240 tolerance execution
- long fan and kiln main shafts where the free end must float without thrust load
- heavy industrial gearbox layshafts used as the non-locating position
- winder and reel drums in paper and steel strip plants
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 140 mm bore, shaft expansion is already measurable: calculate the required float inside the 68 mm wide bearing rather than assuming the free-end clearance is "enough" at operating temperature.
- Reference and limiting speeds are different limits: the 2,400 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 830/1060 kN ratings belong to this exact execution (C 2228); 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.
- Never use C 2228 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 830/1060 kN ratings and 14000 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 862); 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 2228 designation read?
C = CARB toroidal family; 22 = dimension series; 28 = 140 mm bore (code 28 × 5); suffix the bare number selects cylindrical bore for direct shaft fitting, pressed steel 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 (830 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 2228 is the cylindrical bore for direct shaft fitting, pressed steel cage.
How is C 2228 mounted?
Slide or heat (max 120 °C) the bearing onto the 140 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 68 mm roller set.
What are the dimensions and ratings of the C 2228?
A C 2228 measures 140 mm bore × 250 mm outside diameter × 68 mm width (5.512 × 9.843 × 2.677 in). From SKF catalogue PUB BU/P1 17000: dynamic C 830 kN, static C0 1060 kN, fatigue limit Pu 102 kN, reference speed 2,400 r/min, limiting speed 3,200 r/min, mass about 14000 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.