CARB Toroidal Roller Bearings
A single row of long, slightly crowned toroidal rollers between concave raceways. The bearing takes heavy radial load, aligns itself, and lets the shaft move axially inside the bearing without any sliding at the seatings. SES holds the range as an authorised SKF distributor, covering bore range About 30 mm to 1250 mm; rows Single row of toroidal rollers; bore forms Cylindrical, or tapered for sleeve mounting; sealing Open and sealed executions. Executions include cylindrical bore executions, tapered bore executions for adapter or withdrawal sleeve mounting, sealed executions for contaminated positions, executions with a polymer cage, among others. It is specified most often into non-locating ends of paper machine drying cylinders and fan shafts on hot gas and preheater fans in cement plant. Every part is genuine SKF through official channels, with designation, specification and options confirmed against your duty before it ships — supplied from Kolkata and our branch network, with breakdown cover that does not sit in an inbox.
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Load
Heavy radial only
Misalignment
Self-aligning
Axial
Displacement taken up internally
Position
Non-locating end, paired with a locating bearing
Where it runs.
You will find CARB Toroidal Roller Bearings in the parts of a plant where this particular duty actually occurs. In practice that means non-locating ends of paper machine drying cylinders, fan shafts on hot gas and preheater fans in cement plant, conveyor pulleys on long overland systems, and equally continuous casting segment rolls, kiln and dryer support and drive shafts, screw conveyor and dryer shafts running above ambient. What links them is the duty rather than the machine name — load: Heavy radial only. If your installation is not on that list it matters less than you would think: the operating condition decides the specification. Send us the load, the speed, the running temperature and the environment it runs in, and we will match it to the right execution in the SKF range and confirm what is in stock.
Specify it against the duty.
Specification here follows the operating condition, not the catalogue. The shaft grows several millimetres between cold and running condition — A toroidal bearing at the free end with the shaft centred in the roller path when cold. Absorbing that growth inside the bearing avoids the fretting a sliding outer ring produces. The same position also has to tolerate a misaligned housing — This design rather than a cylindrical roller bearing. It handles axial displacement and angular misalignment together, which is exactly what a hot roll or fan shaft gives you. The shaft is located at the other support and cannot be located here — Confirm that the locating bearing is genuinely sized for the whole thrust. A toroidal bearing takes no axial load, and pushing thrust into it drives the rollers to one edge. Where two of those apply at once, specify for the harsher of the two — under-specifying is what puts the part back on the bench a month later. Send us the duty and we will confirm the execution.
Ordering this from SES.
Do not clamp the outer ring axially in the housing. The whole point of this bearing is that the shaft moves inside it — a trapped outer ring turns the design into an ordinary rigid bearing and the rollers will run hard against one shoulder.