C4028-K30V-AH24028 bearing: complete specifications & equivalents
The C4028-K30V-AH24028 is a ISO 15 radial bearing sized 135 x 210 x 69 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 135 mm |
| Outer diameter D | 210 mm |
| Width B | 69 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 750 kN |
| Basic static load rating C0 | 1220 kN |
| Fatigue load limit Pu | 120 kN |
| Limiting speed (mechanical) | 800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 9500 g |
| Manufacturer designation | SKF C 4028 K30V + AH 24028 |
| 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-withdrawal-sleeve range
| Bore d | 5.315 in |
|---|---|
| Outer diameter D | 8.268 in |
| Width B | 2.717 in |
| ISO bore code | 28 |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in carb-withdrawal-sleeve | 35 mm |
| Largest outer diameter in carb-withdrawal-sleeve | 1580 mm |
| Width range across carb-withdrawal-sleeve | 23–462 mm |
| Bore position in carb-withdrawal-sleeve (smallest first) | 17 of 49 |
| Bore above smallest carb-withdrawal-sleeve size | 100 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C4028 | 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 C4028-K30V-AH24028 model number is decoded
Record the sleeve travel at mounting of C4028-K30V-AH24028: the clearance set into the 140 mm bearing today is the reference for the next re-clearance check, and travel data catches seat wear on the 135 mm shaft over the years. Housing side of C4028-K30V-AH24028 is conventional: a 210 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 135 mm shaft.In SKF catalogue PUB BU/P1 17000, C4028-K30V-AH24028 appears as bearing C 4028 K30V + withdrawal sleeve AH 24028 — the large-size execution of the CARB non-locating principle, delivered as one assembly weighing 10 kg.Reading the designation: C 4028 K30V is the CARB toroidal roller bearing itself — self-aligning, designed as the non-locating bearing that lets the shaft float axially — and the withdrawal sleeve AH 24028 carries the tapered bore seat on a 135 mm cylindrical shaft. The suffix letters on the bearing fix cage and tolerance execution; the sleeve number is keyed to the bearing bore. Withdrawal sleeve AH 24028: at this size the sleeve is pulled onto the 135 mm seat (hydraulic assistance is standard) and its taper sets the interference into the 140 mm bearing bore — dismounting uses the sleeve's withdrawal thread, protecting shaft and bearing raceways. The C0/C balance of about 1.63 shows the non-locating CARB character: heavy radial capacity with tolerance of misalignment and axial float — the withdrawal sleeve adds the plain-shaft mounting ability, not thrust capability.
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
- long fan and kiln main shafts where the free end must float without thrust load
Known failure patterns
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
Selection pitfalls — read before you substitute
- Do not run C4028-K30V-AH24028 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.
- Do not run C4028-K30V-AH24028 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.
- Do not run C4028-K30V-AH24028 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.
- The 750/1220 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 4028 K30V + AH 24028 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 C4028-K30V-AH24028?
The unit is CARB bearing C 4028 K30V on withdrawal sleeve AH 24028, fitting a 135 mm shaft (5.315 in), housing bore 210 mm, bearing width 69 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 750 kN, C0 1220 kN, fatigue load limit Pu 120 kN, combined mass about 9.5 kg. The catalogue lists no speed ratings for this size class — permissible speed follows the application heat balance.
Why does C4028-K30V-AH24028 list a 135 mm shaft size when the bearing bore is 140 mm?
The sleeve takes up the difference: the withdrawal sleeve AH 24028 has a tapered outside that engages the bearing's 140 mm tapered bore and a cylindrical bore that seats on the 135 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C4028-K30V-AH24028 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 4028 K30V and the sleeve AH 24028 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 C4028-K30V-AH24028 as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C4028-K30V-AH24028 set at mounting?
By sleeve travel: the withdrawal sleeve AH 24028 is driven or pressed to a marked travel on the 135 mm seat, which sets the interference into the 140 mm bore and with it the radial clearance. Record the travel; hydraulic assistance is standard at this size.
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.