C2211-KTN9 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 C2211-KTN9 model number is decoded

In SKF catalogue PUB BU/P1 17000, C 2211 KTN9 denotes a toroidal roller bearing whose 25 mm long rollers crown at both ends: the contact accepts angular misalignment while the ring positions float, which is why CARB bearings are specified at the free shaft end. The designation C 2211 KTN9 separates into C (CARB), 22 (dimension series), 11 (55 mm bore) and KTN9 (tapered 1:12 bore for adapter (H) sleeve mounting, TN9 glass-fibre PA66 cage); envelope 55×100×25 mm follows the ISO 15 plan. The TN9 suffix marks a glass fibre reinforced PA66 cage: lower friction and quieter than the full-complement V execution, with a 6,300 r/min reference speed, the usual choice for continuous-duty fans and paper rolls. The 800 g mass over the 55×100×25 mm envelope yields about 2.11 kN dynamic per millimetre of bore — the long toroidal rollers give this family its radial capacity density. 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 25 mm wide cavity does not fill itself.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 55 mm bore the small CARB executions are unusually wide (25 mm) for their 100 mm OD — confirm the housing width before substituting a standard spherical bearing of the same bore.
• Reference and limiting speeds are different limits: the 6,300 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 116/114 kN ratings belong to this exact execution (C 2211 KTN9); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
• Never use C 2211 KTN9 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 55 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
• The 116/114 kN ratings and 800 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 858); mounting data — axial displacement (s) and seating details — appears in the running text because the structured record carries the boundary envelope only.