C4126-2CS5V-GEM9 bearing: complete specifications & equivalents
The C4126-2CS5V-GEM9 is a ISO 15 radial bearing sized 130 x 210 x 80 mm (bore x OD x width) with 2RS sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 130 mm |
| Outer diameter D | 210 mm |
| Width B | 80 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 750 kN |
| Basic static load rating C0 | 1100 kN |
| Fatigue load limit Pu | 108 kN |
| Limiting speed (mechanical) | 70 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 10500 g |
| Manufacturer designation | C 4126-2CS5V/GEM9 |
| 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 | 5.118 in |
|---|---|
| Outer diameter D | 8.268 in |
| Width B | 3.15 in |
| ISO bore code | 26 |
| 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) | 4 of 14 |
| Bore above smallest C4100-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 24126 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (130×210×80 mm) SKF spherical roller bearing SKF 24126 CC/W33 with ratings within 10 % — not a drop-in substitute: SKF 24126 CC/W33 locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
| 24126-CCK30-W33 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (130×210×80 mm) SKF spherical roller bearing SKF 24126 CCK30/W33 with ratings within 10 % — not a drop-in substitute: SKF 24126 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 C4126-2CS5V-GEM9 model number is decoded
C 4126-2CS5V/GEM9 is a CARB toroidal roller bearing to ISO 15: a single row of long, symmetrical barrel-shaped rollers between guide flanges, sized 130×210×80 mm, as listed in SKF catalogue PUB BU/P1 17000 ch. 10.1. SKF builds the CARB order number from size plus execution: the bare number C 4126 is the full-complement cylindrical-bore bearing, K (or K30) makes the bore tapered for sleeve mounting, and the cage/seal letters follow — here 2CS5V/GEM9. The cylindrical 130 mm bore mounts directly on a machined seat; the outer ring takes a loose housing fit so the bearing can float axially. The same size is listed in both bore executions, and the boundary dimensions 130×210×80 mm are identical — only the mounting method changes. The 10500 g mass over the 130×210×80 mm envelope yields about 5.77 kN dynamic per millimetre of bore — the long toroidal rollers give this family its radial capacity density. Sealed executions arrive greased for life: do not wash out the factory fill, and mount seals-clear of the housing shoulder edges. Grease through the annular groove features where provided; on open executions feed lubricant past the long roller set at assembly, since the 80 mm wide cavity does not fill itself.
Typical equipment & failure modes
Common applications
- vibrating screen exciters fitted with the VE240 tolerance execution
- long fan and kiln main shafts where the free end must float without thrust load
- heavy industrial gearbox layshafts used as the non-locating position
- winder and reel drums in paper and steel strip plants
Known failure patterns
- roller-end and flange smearing after lubricant starvation at the long roller contacts
- roller skew and cage damage after the bearing is clamped solid between shaft and housing shoulders
- brass cage pocket wear under marginal lubrication in the large-bore M/MB executions
- condensation pitting in machines that run intermittently in humid environments
- oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips
Selection pitfalls — read before you substitute
- At 130 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.
- The quoted 750/1100 kN ratings belong to this exact execution (C 4126-2CS5V/GEM9); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- 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.
- 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.
- Never use C 4126-2CS5V/GEM9 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.
- The 750/1100 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
Is the C 4126-2CS5V/GEM9 sealed?
Yes — this is a sealed full-complement execution (2CS5V contact seals with annular groove), greased at the factory; the catalogue lists no reference speed and the limiting speed is 70 r/min.
What fails first on a misapplied CARB bearing?
Blocking the designed axial float — clamping the free end or locating both shaft ends — turns thermal growth into edge loading and spalls the toroidal raceways. Cage damage and ordinary fatigue follow overload or dry running.
Which dimensions does the C 4126-2CS5V/GEM9 have?
A C 4126-2CS5V/GEM9 measures 130 mm bore × 210 mm outside diameter × 80 mm width (5.118 × 8.268 × 3.15 in). From SKF catalogue PUB BU/P1 17000: dynamic C 750 kN, static C0 1100 kN, fatigue limit Pu 108 kN, limiting speed 70 r/min, no reference speed listed, mass about 10500 g.
What does C 4126-2CS5V/GEM9 mean in SKF part numbering?
C marks CARB; 41 the dimension series; the size code gives 130 mm bore; 2CS5V/GEM9 is the execution (cylindrical bore for direct shaft fitting, 2CS5V/GEM9 sealed full-complement execution with annular groove). The envelope follows ISO 15 and matches spherical roller bearing outlines, but the functions differ.
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.