C4128-V-VE240 bearing: complete specifications & equivalents
The C4128-V-VE240 is a ISO 15 radial bearing sized 140 x 225 x 85 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 140 mm |
| Outer diameter D | 225 mm |
| Width B | 85 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 | 1200 kN |
| Fatigue load limit Pu | 116 kN |
| Limiting speed (mechanical) | 800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 12500 g |
| Manufacturer designation | C 4128 V/VE240 |
| 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 | 5.512 in |
|---|---|
| Outer diameter D | 8.858 in |
| Width B | 3.346 in |
| ISO bore code | 28 |
| Radial section height (D−d)/2 | 42.5 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) | 5 of 14 |
| Bore above smallest C4100-series size | 40 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C4128-2CS5V-GEM9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 140×225×85 mm ISO 15 envelope and equivalent catalogue C/C0; C 4128-2CS5V/GEM9 is the cylindrical-bore sealed full-complement V execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| 24128 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (140×225×85 mm) SKF spherical roller bearing SKF 24128 CC/W33 with ratings within 10 % — not a drop-in substitute: SKF 24128 CC/W33 locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
| 24128-CCK30-W33 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (140×225×85 mm) SKF spherical roller bearing SKF 24128 CCK30/W33 with ratings within 10 % — not a drop-in substitute: SKF 24128 CCK30/W33 locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
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 C4128-V-VE240 model number is decoded
C 4128 V/VE240 is a CARB toroidal roller bearing to ISO 15: a single row of long, symmetrical barrel-shaped rollers between guide flanges, sized 140×225×85 mm, as listed in SKF catalogue PUB BU/P1 17000 ch. 10.1. The designation C 4128 V/VE240 separates into C (CARB), 41 (dimension series), 140 mm (slash-size) (140 mm bore — bore 140 mm is written directly after the slash) and V/VE240 (cylindrical bore for direct shaft fitting, full-complement V execution (no cage)); envelope 140×225×85 mm follows the ISO 15 plan. The V suffix denotes a full complement: the toroidal rollers fill the 85 mm space without a cage, raising C to 780 kN but cutting the speed ceiling (no reference speed is listed) versus the caged size. Float capacity is a selection criterion: the catalogue lists the permissible axial displacement (s) for the 85 mm wide set; size the free-end housing so thermal growth stays within it, not just inside the overall width. Open executions accept relubrication — route it through the outer-ring groove on sizes that have one and purge stale grease at service intervals. Grease through the annular groove features where provided; on open executions feed lubricant past the long roller set at assembly, since the 85 mm wide cavity does not fill itself.
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
- thermal preloading when a shaft is located at both ends and growth has nowhere to go
- PA66 cage (TN9) softening when the sustained temperature passes the polymer limit
- hard-particle indentation where oil or grease filtration is inadequate
- grease churning and overheating when a high-speed thrust position is over-packed
Selection pitfalls — read before you substitute
- At 140 mm bore, shaft expansion is already measurable: calculate the required float inside the 85 mm wide bearing rather than assuming the free-end clearance is "enough" at operating temperature.
- Do not block the axial displacement in the drawing: housing covers, labyrinth rings and snap rings must leave the catalogue float (s) free, or the bearing silently becomes a poorly located fixed bearing.
- Envelope-identical spherical roller bearings (same ISO 15 d×D×B) are not drop-in equivalents — they locate the shaft axially, while C 4128 V/VE240 must float; the two are designed to be used as a pair.
- Never use C 4128 V/VE240 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 140 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- The 780/1200 kN ratings and 12500 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 the C 4128 V/VE240 designation read?
C = CARB toroidal family; 41 = dimension series; 140 mm (slash-size) = 140 mm bore (the bore is written directly after the slash (no bore code)); suffix V/VE240 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 4128 V/VE240 is the cylindrical bore for direct shaft fitting, full-complement V execution (no cage).
How is C 4128 V/VE240 mounted?
Slide or heat (max 120 °C) the bearing onto the 140 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 85 mm roller set.
What are the dimensions and ratings of the C 4128 V/VE240?
A C 4128 V/VE240 measures 140 mm bore × 225 mm outside diameter × 85 mm width (5.512 × 8.858 × 3.346 in). From SKF catalogue PUB BU/P1 17000: dynamic C 780 kN, static C0 1200 kN, fatigue limit Pu 116 kN, limiting speed 800 r/min, no reference speed listed, mass about 12500 g.
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.