C3040-K-AH3040-G bearing: complete specifications & equivalents
The C3040-K-AH3040-G is a ISO 15 radial bearing sized 190 x 310 x 82 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 190 mm |
| Outer diameter D | 310 mm |
| Width B | 82 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1120 kN |
| Basic static load rating C0 | 1730 kN |
| Fatigue load limit Pu | 153 kN |
| Reference speed (thermal) | 1700 rpm |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 25500 g |
| Manufacturer designation | SKF C 3040 K + AH 3040 G |
| 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 | 7.48 in |
|---|---|
| Outer diameter D | 12.205 in |
| Width B | 3.228 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 60 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) | 23 of 49 |
| Bore above smallest carb-withdrawal-sleeve size | 155 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C3040 | 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 C3040-K-AH3040-G model number is decoded
Dismounting uses the withdrawal thread on AH 3040 G: pull the sleeve back along its cone with the dedicated withdrawal nut or hydraulic tool — the CARB bearing and sleeve come off the 190 mm seat as one piece and the seat stays undamaged. Housing side of C3040-K-AH3040-G is conventional: a 310 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 190 mm shaft.The C3040-K-AH3040-G unit combines the 200 mm-bore CARB toroidal roller bearing C 3040 K with withdrawal sleeve AH 3040 G, giving controlled mounting interference on a plain 190 mm cylindrical seat.Numbering logic: the bearing half C 3040 K follows the CARB works numbering (type C, dimension series, 200 mm bore), while AH 3040 G identifies the sleeve execution for that bore; the combo C3040-K-AH3040-G exists in the catalogue so that shaft (190 mm), housing (310 mm) and both components are specified with one order number. Combined mass of the unit — bearing C 3040 K plus sleeve AH 3040 G — is about 26 kg; plan lifting gear and heating equipment around the assembly, not the bare bearing. The C0/C balance of about 1.54 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
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
Selection pitfalls — read before you substitute
- Keep the pair complete in stores: storing bearing C 3040 K and sleeve AH 3040 G on different shelves is how taper-mismatch accidents start — store the unit as received under one part number.
- Keep the pair complete in stores: storing bearing C 3040 K and sleeve AH 3040 G on different shelves is how taper-mismatch accidents start — store the unit as received under one part number.
- Never set C3040-K-AH3040-G by locknut torque or "feel": the withdrawal sleeve travel defines the clearance of the 200 mm CARB bearing — measure residual radial clearance during mounting, in steps.
- The 1120/1730 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 3040 K + AH 3040 G 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 C3040-K-AH3040-G?
The unit is CARB bearing C 3040 K on withdrawal sleeve AH 3040 G, fitting a 190 mm shaft (7.48 in), housing bore 310 mm, bearing width 82 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 1120 kN, C0 1730 kN, fatigue load limit Pu 153 kN, combined mass about 25.5 kg. Reference speed 1,700 r/min, limiting speed 2,400 r/min (bearing values).
Why does C3040-K-AH3040-G list a 190 mm shaft size when the bearing bore is 200 mm?
The sleeve takes up the difference: the withdrawal sleeve AH 3040 G has a tapered outside that engages the bearing's 200 mm tapered bore and a cylindrical bore that seats on the 190 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C3040-K-AH3040-G 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 3040 K and the sleeve AH 3040 G 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 C3040-K-AH3040-G as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C3040-K-AH3040-G set at mounting?
By sleeve travel: the withdrawal sleeve AH 3040 G is driven or pressed to a marked travel on the 190 mm seat, which sets the interference into the 200 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.