C31-600-MB bearing: complete specifications & equivalents

Specification table

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.

Cross references & equivalents

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 C31-600-MB model number is decoded

C 31/600 MB is the dimension series 31 CARB toroidal roller bearings member of the CARB range: 600 mm bore, 980 mm OD, 300 mm width, with the asymmetrical-looking toroidal roller set that defines the CARB principle. The designation C 31/600 MB separates into C (CARB), 31 (dimension series), 600 mm (slash-size) (600 mm bore — bore 600 mm is written directly after the slash) and MB (cylindrical bore for direct shaft fitting, machined inner-ring-guided brass cage (MB)); envelope 600×980×300 mm follows the ISO 15 plan. 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 600 mm shaft deflects; the 430 r/min reference and 600 r/min limiting speed are both catalogue values. Speed planning separates the 430 r/min thermal reference from the 600 r/min mechanical limiting speed. The full-complement V executions carry more load but list no thermal reference speed; the brass-caged executions run faster and cooler at light load. Mounting: slide the bearing onto the 600 mm seat or heat it (max 120 °C) and seat it square; never press through the 300 mm roller set, and leave the free-end housing shoulder clear so axial float is unrestricted.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 600 mm bore the 929 kg mass and 300 mm width make seating geometry dominant: sphered-washer seats and oil flow must be verified in place, not just on the drawing.
• Never use C 31/600 MB 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 600 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
• Reference and limiting speeds are different limits: the 430 r/min reference speed is the thermal criterion under load, the limiting value is the mechanical ceiling; observe the reference under load unless the arrangement calculation says otherwise.
• The quoted 10200/18000 kN ratings belong to this exact execution (C 31/600 MB); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
• The 10200/18000 kN ratings and 929000 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 866); mounting data — axial displacement (s) and seating details — appears in the running text because the structured record carries the boundary envelope only.