C4124-V bearing: complete specifications & equivalents
The C4124-V is a ISO 15 radial bearing sized 120 x 200 x 80 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 120 mm |
| Outer diameter D | 200 mm |
| Width B | 80 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 | 1120 kN |
| Fatigue load limit Pu | 114 kN |
| Limiting speed (mechanical) | 750 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 10000 g |
| Manufacturer designation | C 4124 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 & C4100-series range
| Bore d | 4.724 in |
|---|---|
| Outer diameter D | 7.874 in |
| Width B | 3.15 in |
| ISO bore code | 24 |
| Radial section height (D−d)/2 | 40 mm |
| Smallest bore in C4100-series | 100 mm |
| Largest outer diameter in C4100-series | 1090 mm |
| Width range across C4100-series | 65–412 mm |
| Bore position in C4100-series (smallest first) | 3 of 14 |
| Bore above smallest C4100-series size | 20 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 24124 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 120×200×80 mm envelope as the SKF spherical roller bearing SKF 24124 CC/W33, but catalogue C/C0 differ (780/1120 kN vs 679/950 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
| 24124-CCK30-W33 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 120×200×80 mm envelope as the SKF spherical roller bearing SKF 24124 CCK30/W33, but catalogue C/C0 differ (780/1120 kN vs 679/950 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 C4124-V model number is decoded
In SKF catalogue PUB BU/P1 17000, C 4124 V denotes a toroidal roller bearing whose 80 mm long rollers crown at both ends: the contact accepts angular misalignment while the ring positions float, which is why CARB bearings are specified at the free shaft end. The designation C 4124 V separates into C (CARB), 41 (dimension series), 24 (120 mm bore) and V (cylindrical bore for direct shaft fitting, full-complement V execution (no cage)); envelope 120×200×80 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 120 mm seat. No thermal reference speed is listed for this full-complement execution; the mechanical limiting speed is 750 r/min. The full-complement V executions carry more load but list no thermal reference speed; the steel-caged executions run faster and cooler at light load. 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
- roller skew and cage damage after the bearing is clamped solid between shaft and housing shoulders
- PA66 cage (TN9) softening when the sustained temperature passes the polymer limit
- hard-particle indentation where oil or grease filtration is inadequate
- abrasive paste forming as dust bypasses the housing seals into the open washer set
Selection pitfalls — read before you substitute
- At 120 mm bore, shaft expansion is already measurable: calculate the required float inside the 80 mm wide bearing rather than assuming the free-end clearance is "enough" at operating temperature.
- Never use C 4124 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 120 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- 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 780/1120 kN ratings belong to this exact execution (C 4124 V); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- The 780/1120 kN ratings and 10000 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
Can a CARB bearing like C 4124 V locate the shaft axially?
No — that is the defining feature. C 4124 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 4124 V designation read?
C = CARB toroidal family; 41 = dimension series; 24 = 120 mm bore (code 24 × 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.
What is the difference between V and TN9 CARB executions?
V is the full-complement execution with no cage — more rollers, higher C (780 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 4124 V is the cylindrical bore for direct shaft fitting, full-complement V execution (no cage).
How is C 4124 V mounted?
Slide or heat (max 120 °C) the bearing onto the 120 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 80 mm roller set.
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.