C4020-V bearing: complete specifications & equivalents
The C4020-V is a ISO 15 radial bearing sized 100 x 150 x 50 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 100 mm |
| Outer diameter D | 150 mm |
| Width B | 50 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 355 kN |
| Basic static load rating C0 | 530 kN |
| Fatigue load limit Pu | 58.5 kN |
| Limiting speed (mechanical) | 1400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3050 g |
| Manufacturer designation | C 4020 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 | 3.937 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 1.969 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 25 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) | 4 of 16 |
| Bore above smallest C4000-series size | 50 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 24020 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×150×50 mm envelope as the SKF spherical roller bearing SKF 24020 CC/W33, but catalogue C/C0 differ (355/530 kN vs 296/415 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 C4020-V model number is decoded
C 4020 V is the dimension series 40 CARB toroidal roller bearings member of the CARB range: 100 mm bore, 150 mm OD, 50 mm width, with the asymmetrical-looking toroidal roller set that defines the CARB principle. The designation C 4020 V separates into C (CARB), 40 (dimension series), 20 (100 mm bore) and V (cylindrical bore for direct shaft fitting, full-complement V execution (no cage)); envelope 100×150×50 mm follows the ISO 15 plan. The V suffix denotes a full complement: the toroidal rollers fill the 50 mm space without a cage, raising C to 355 kN but cutting the speed ceiling (no reference speed is listed) versus the caged size. 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 4020 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
- 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
- brinelling of washer raceways from impact or mounting force applied through the rolling elements
- grease churning and overheating when a high-speed thrust position is over-packed
Selection pitfalls — read before you substitute
- At 100 mm bore, shaft expansion is already measurable: calculate the required float inside the 50 mm wide bearing rather than assuming the free-end clearance is "enough" at operating temperature.
- Never use C 4020 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 100 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 355/530 kN ratings belong to this exact execution (C 4020 V); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- The 355/530 kN ratings and 3050 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 860); 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 4020 V mounted?
Slide or heat (max 120 °C) the bearing onto the 100 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 50 mm roller set.
What are the dimensions and ratings of the C 4020 V?
A C 4020 V measures 100 mm bore × 150 mm outside diameter × 50 mm width (3.937 × 5.906 × 1.969 in). From SKF catalogue PUB BU/P1 17000: dynamic C 355 kN, static C0 530 kN, fatigue limit Pu 58.5 kN, limiting speed 1,400 r/min, no reference speed listed, mass about 3050 g.
Can a CARB bearing like C 4020 V locate the shaft axially?
No — that is the defining feature. C 4020 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 4020 V designation read?
C = CARB toroidal family; 40 = dimension series; 20 = 100 mm bore (code 20 × 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.