C4030-V bearing: complete specifications & equivalents
The C4030-V is a ISO 15 radial bearing sized 150 x 225 x 75 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 150 mm |
| Outer diameter D | 225 mm |
| Width B | 75 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 780 kN |
| Basic static load rating C0 | 1320 kN |
| Fatigue load limit Pu | 127 kN |
| Limiting speed (mechanical) | 750 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 10500 g |
| Manufacturer designation | C 4030 V |
| 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 & C4000-series range
| Bore d | 5.906 in |
|---|---|
| Outer diameter D | 8.858 in |
| Width B | 2.953 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in C4000-series | 50 mm |
| Largest outer diameter in C4000-series | 1030 mm |
| Width range across C4000-series | 30–315 mm |
| Bore position in C4000-series (smallest first) | 9 of 16 |
| Bore above smallest C4000-series size | 100 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C4030-2CS5V-GEM9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 150×225×75 mm envelope, but catalogue C/C0 differ between the cylindrical-bore full-complement V and cylindrical-bore sealed full-complement V executions (780/1320 kN vs 585/965 kN) — envelope match, not a load-rating equivalent. |
| C4030-K30V | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 150×225×75 mm ISO 15 envelope and equivalent catalogue C/C0; C 4030 K30V is the 1:30 tapered-bore K30 full-complement V execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| 24030 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 150×225×75 mm envelope as the SKF spherical roller bearing SKF 24030 CC/W33, but catalogue C/C0 differ (780/1320 kN vs 680/1040 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
| 24030-CCK30-W33 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 150×225×75 mm envelope as the SKF spherical roller bearing SKF 24030 CCK30/W33, but catalogue C/C0 differ (780/1320 kN vs 680/1040 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 C4030-V model number is decoded
C 4030 V belongs to the CARB family — compact aligning roller bearings: envelope 150×225×75 mm, radial rating 780/1320 kN C/C0, and no axial-locating function by design. The designation C 4030 V separates into C (CARB), 40 (dimension series), 30 (150 mm bore) and V (cylindrical bore for direct shaft fitting, full-complement V execution (no cage)); envelope 150×225×75 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 150 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 4030 V deliberately carries none. After fitting, confirm the inner ring can be pushed axially by hand through the catalogue displacement range; a ring that will not slide means the position is locked and will preload in service.
Typical equipment & failure modes
Common applications
- 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
- vibrating screen exciters fitted with the VE240 tolerance execution
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
- condensation pitting in machines that run intermittently in humid environments
- grease churning and overheating when a high-speed thrust position is over-packed
Selection pitfalls — read before you substitute
- At 150 mm bore, shaft expansion is already measurable: calculate the required float inside the 75 mm wide bearing rather than assuming the free-end clearance is "enough" at operating temperature.
- Reference and limiting speeds are different limits: the catalogue lists no thermal reference speed for this full-complement/sealed execution, the limiting value is the mechanical ceiling; observe the reference under load unless the arrangement calculation says otherwise.
- The quoted 780/1320 kN ratings belong to this exact execution (C 4030 V); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- Never use C 4030 V 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.
- Tapered-bore K executions mount on adapter sleeves (1:12) and K30 on withdrawal sleeves (1:30) — the 150 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- The 780/1320 kN ratings and 10500 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 C 4030 V mounted?
Slide or heat (max 120 °C) the bearing onto the 150 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 75 mm roller set.
What are the dimensions and ratings of the C 4030 V?
A C 4030 V measures 150 mm bore × 225 mm outside diameter × 75 mm width (5.906 × 8.858 × 2.953 in). From SKF catalogue PUB BU/P1 17000: dynamic C 780 kN, static C0 1320 kN, fatigue limit Pu 127 kN, limiting speed 750 r/min, no reference speed listed, mass about 10500 g.
Can a CARB bearing like C 4030 V locate the shaft axially?
No — that is the defining feature. C 4030 V 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 4030 V designation read?
C = CARB toroidal family; 40 = dimension series; 30 = 150 mm bore (code 30 × 5); suffix V selects cylindrical bore for direct shaft fitting, full-complement V execution (no cage). K is a 1:12 tapered bore for an adapter sleeve, K30 a 1:30 bore for a withdrawal sleeve.
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.