C2228-K-H3128-L bearing: complete specifications & equivalents
The C2228-K-H3128-L is a ISO 15 radial bearing sized 125 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 | 125 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 | 17500 g |
| Manufacturer designation | SKF C 2228 K + H 3128 L |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves |
| Last verified | 2026-09-29 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves) · extracted 2026-09-29
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves); 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 & carb-adapter-sleeve range
| Bore d | 4.921 in |
|---|---|
| Outer diameter D | 9.843 in |
| Width B | 2.677 in |
| ISO bore code | 28 |
| Radial section height (D−d)/2 | 62.5 mm |
| Smallest bore in carb-adapter-sleeve | 25 mm |
| Largest outer diameter in carb-adapter-sleeve | 1580 mm |
| Width range across carb-adapter-sleeve | 20–462 mm |
| Bore position in carb-adapter-sleeve (smallest first) | 18 of 51 |
| Bore above smallest carb-adapter-sleeve size | 100 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2228 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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-K-H3128-L model number is decoded
Sleeve discipline: H 3128 L and bearing C 2228 K are ground as a matched taper pair — the sleeve's seat diameter and the bearing's bore taper are manufactured together, which is why the catalogue lists the combination as one order number (C2228-K-H3128-L). The C0/C balance of about 1.28 shows the non-locating CARB character: heavy radial capacity with tolerance of misalignment and axial float — the adapter sleeve adds the plain-shaft mounting ability, not thrust capability. Dismounting: release the locknut of H 3128 L, drive the sleeve back off its cone — never hammer the inner ring; the CARB bearing separates from the shaft with the sleeve and stays serviceable if the raceways are sound. Housing side of C2228-K-H3128-L is conventional: a 250 mm H7 bore takes the CARB outer ring, which is free to slide axially in the housing — the toroidal raceway handles the misalignment and the sleeve side handles the location on the 125 mm shaft.In SKF catalogue PUB BU/P1 17000, C2228-K-H3128-L appears as bearing C 2228 K + adapter sleeve H 3128 L: the non-locating CARB principle combined with a tapered-bore sleeve seat for a 125 mm shaft.Digit by digit, C2228-K-H3128-L = CARB bearing C 2228 K (140 mm bore, 250 mm OD, 68 mm width) + adapter sleeve H 3128 L for the 125 mm cylindrical shaft seat; cage and tolerance letters stay with the bearing half of the designation.
Typical equipment & failure modes
Common applications
- 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
- winder and reel drums in paper and steel strip plants
Known failure patterns
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
- misalignment edge loading when the housing bore is out of square with the shaft seat
Selection pitfalls — read before you substitute
- Do not run C2228-K-H3128-L as a locating bearing: the CARB raceway is toroidal and the unit is designed to float axially; blocking it against a shoulder preloads the rollers and ends in thermal failure.
- Protect the 125 mm seat: sleeve bore corrosion or seat ovality shows up later as sleeve creep and fretting; inspect and measure the seat at every dismounting of C2228-K-H3128-L.
- Contamination discipline: the CARB bearing is open (this execution has no seals); flush the housing before mounting C2228-K-H3128-L and maintain the lubricant filtration — hard particles indent the toroidal raceway quickly at heavy load.
- The 830/1060 kN ratings are SKF catalogue 17000 values for the CARB bearing; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification.
- Quote the full unit designation SKF C 2228 K + H 3128 L when purchasing — bearing and sleeve execution letters are part of the order number and define the matched taper pair.
Frequently asked questions
What are the dimensions and catalogue data of C2228-K-H3128-L?
The unit is CARB bearing C 2228 K on adapter sleeve H 3128 L, fitting a 125 mm shaft (4.921 in), housing bore 250 mm, bearing width 68 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 830 kN, C0 1060 kN, fatigue load limit Pu 102 kN, combined mass about 17.5 kg. Reference speed 2,400 r/min, limiting speed 3,200 r/min (bearing values).
Why does C2228-K-H3128-L list a 125 mm shaft size when the bearing bore is 140 mm?
The sleeve takes up the difference: the adapter sleeve H 3128 L has a tapered outside that engages the bearing's 140 mm tapered bore and a cylindrical bore that seats on the 125 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C2228-K-H3128-L a locating or non-locating bearing?
Non-locating. The CARB toroidal roller bearing is designed as the free end of the shaft: its raceway geometry tolerates misalignment and allows axial float, while a separate locating bearing (typically a spherical roller or paired taper) takes the thrust. The sleeve does not change this function.
Can I buy the bearing C 2228 K and the sleeve H 3128 L separately?
The components are catalogued separately, but the taper pair is matched — the sleeve seat and the bearing bore are manufactured to the same execution. Ordering the unit C2228-K-H3128-L as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C2228-K-H3128-L set at mounting?
By driving the adapter sleeve up its conical seat: the sleeve expands on the 125 mm shaft and onto the bearing bore, reducing the radial internal clearance. Mount in steps and measure residual clearance until it reaches the catalogue value for the K bore — never set it by nut torque alone.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves on 2026-09-29. Read our editorial & correction policy.