C4032-K30 bearing: complete specifications & equivalents
The C4032-K30 is a ISO 15 radial bearing sized 160 x 240 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 | 160 mm |
| Outer diameter D | 240 mm |
| Width B | 80 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 765 kN |
| Basic static load rating C0 | 1160 kN |
| Fatigue load limit Pu | 110 kN |
| Reference speed (thermal) | 1700 rpm |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 12500 g |
| Manufacturer designation | C 4032 K30 |
| 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 | 6.299 in |
|---|---|
| Outer diameter D | 9.449 in |
| Width B | 3.15 in |
| ISO bore code | 32 |
| Radial section height (D−d)/2 | 40 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) | 10 of 16 |
| Bore above smallest C4000-series size | 110 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C4032 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 160×240×80 mm ISO 15 envelope and equivalent catalogue C/C0; C 4032 is the cylindrical-bore steel-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| C4032-2CS5V-GEM9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 160×240×80 mm envelope, but catalogue C/C0 differ between the 1:30 tapered-bore K30 steel-caged and cylindrical-bore sealed full-complement V executions (765/1160 kN vs 830/1290 kN) — envelope match, not a load-rating equivalent. |
| C4032-V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 160×240×80 mm envelope, but catalogue C/C0 differ between the 1:30 tapered-bore K30 steel-caged and cylindrical-bore full-complement V executions (765/1160 kN vs 915/1460 kN) — envelope match, not a load-rating equivalent. |
| C4032-K30V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 160×240×80 mm envelope, but catalogue C/C0 differ between the 1:30 tapered-bore K30 steel-caged and 1:30 tapered-bore K30 full-complement V executions (765/1160 kN vs 915/1460 kN) — envelope match, not a load-rating equivalent. |
| 24032 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (160×240×80 mm) SKF spherical roller bearing SKF 24032 CC/W33 with ratings within 10 % — not a drop-in substitute: SKF 24032 CC/W33 locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
| 24032-CCK30-W33 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (160×240×80 mm) SKF spherical roller bearing SKF 24032 CCK30/W33 with ratings within 10 % — not a drop-in substitute: SKF 24032 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 C4032-K30 model number is decoded
C 4032 K30 is the dimension series 40 CARB toroidal roller bearings member of the CARB range: 160 mm bore, 240 mm OD, 80 mm width, with the asymmetrical-looking toroidal roller set that defines the CARB principle. SKF builds the CARB order number from size plus execution: the bare number C 4032 is the steel-caged cylindrical-bore bearing, K (or K30) makes the bore tapered for sleeve mounting, and the cage/seal letters follow — here K30. The open execution relies on the housing seals and lubrication system, fed through groove/hole features on the large sizes. Explorer-class heat treatment and the crowned roller profile keep edge stress down when the 160 mm shaft deflects; the 1,700 r/min reference and 2,400 r/min limiting speed are both catalogue values. Selection arithmetic: C 765 kN against C0 1160 kN gives a C0/C ratio of 1.52, and the 110 kN fatigue load limit Pu sets the contamination-adjusted life floor. Seat tolerances follow the ISO 15 recommendation for the normal-load position — the 240 mm outer ring typically takes a loose housing fit to preserve float, and the rings must be supported across their full faces.
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
- roller-end and flange smearing after lubricant starvation at the long roller contacts
- edge loading and premature spalling when the CARB position is blocked from its designed axial float
- brass cage pocket wear under marginal lubrication in the large-bore M/MB executions
- electrical erosion of raceways on VFD-driven shafts without grounding or insulation
- abrasive paste forming as dust bypasses the housing seals into the open washer set
Selection pitfalls — read before you substitute
- At 160 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.
- Envelope-identical spherical roller bearings (same ISO 15 d×D×B) are not drop-in equivalents — they locate the shaft axially, while C 4032 K30 must float; the two are designed to be used as a pair.
- Never use C 4032 K30 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 quoted 765/1160 kN ratings belong to this exact execution (C 4032 K30); 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.
- The 765/1160 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
Why is C 4032 K30 used opposite a spherical roller bearing?
The spherical bearing locates the shaft and takes thrust; the CARB bearing at the other end self-aligns but floats, absorbing thermal expansion without inducing axial load. The pair is standard on paper machine drying cylinders and long caster rolls.
Is the C 4032 K30 sealed?
No, it is an open execution relying on the housing seals; relubrication follows the groove/hole features of the size.
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 4032 K30 have?
A C 4032 K30 measures 160 mm bore × 240 mm outside diameter × 80 mm width (6.299 × 9.449 × 3.15 in). From SKF catalogue PUB BU/P1 17000: dynamic C 765 kN, static C0 1160 kN, fatigue limit Pu 110 kN, reference speed 1,700 r/min, limiting speed 2,400 r/min, 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.