C2234-K bearing: complete specifications & equivalents
The C2234-K is a ISO 15 radial bearing sized 170 x 310 x 86 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 170 mm |
| Outer diameter D | 310 mm |
| Width B | 86 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1270 kN |
| Basic static load rating C0 | 1630 kN |
| Fatigue load limit Pu | 146 kN |
| Reference speed (thermal) | 1900 rpm |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 28000 g |
| Manufacturer designation | C 2234 K |
| 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 & C2200-series range
| Bore d | 6.693 in |
|---|---|
| Outer diameter D | 12.205 in |
| Width B | 3.386 in |
| ISO bore code | 34 |
| Radial section height (D−d)/2 | 70 mm |
| Smallest bore in C2200-series | 30 mm |
| Largest outer diameter in C2200-series | 400 mm |
| Width range across C2200-series | 20–108 mm |
| Bore position in C2200-series (smallest first) | 19 of 21 |
| Bore above smallest C2200-series size | 140 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2234 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 170×310×86 mm ISO 15 envelope and equivalent catalogue C/C0; C 2234 is the cylindrical-bore steel-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
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 C2234-K model number is decoded
For long shafts that grow thermally, SKF supplies C 2234 K: the toroidal rollers allow the 170 mm inner ring to displace axially without induced thrust, while still accommodating shaft deflection like a spherical bearing. In C 2234 K the 22 dimension series fixes the 310 mm OD and 86 mm width around the 170 mm bore (code 34 × 5); the suffix K then selects the tapered 1:12 bore for adapter (H) sleeve mounting, pressed steel cage. The unsuffixed execution carries a pressed steel window cage — the balanced standard for the 170×310 mm size with 1270 kN dynamic and a 1,900 r/min reference speed. The 28000 g mass over the 170×310×86 mm envelope yields about 7.47 kN dynamic per millimetre of bore — the long toroidal rollers give this family its radial capacity density. Seat tolerances follow the ISO 15 recommendation for the normal-load position — the 310 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
- 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
- long fan and kiln main shafts where the free end must float without thrust load
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after sustained overload
- edge loading and premature spalling when the CARB position is blocked from its designed axial float
- PA66 cage (TN9) softening when the sustained temperature passes the polymer limit
- false brinelling and rust-red witness marks on standby machines under external vibration
- grease churning and overheating when a high-speed thrust position is over-packed
Selection pitfalls — read before you substitute
- At 170 mm bore, shaft expansion is already measurable: calculate the required float inside the 86 mm wide bearing rather than assuming the free-end clearance is "enough" at operating temperature.
- Never use C 2234 K 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 170 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- The quoted 1270/1630 kN ratings belong to this exact execution (C 2234 K); 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 1270/1630 kN ratings and 28000 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
What is the difference between V and TN9 CARB executions?
V is the full-complement execution with no cage — more rollers, higher C (1270 kN here) but a lower speed ceiling and no thermal reference speed. TN9 is the glass-fibre PA66 caged execution, faster and quieter at somewhat lower load. C 2234 K is the tapered 1:12 bore for adapter (H) sleeve mounting, pressed steel cage.
How is C 2234 K mounted?
The tapered 1:12 bore mounts on an adapter (H) sleeve with a defined drive-up; heat the bearing to max 120 °C when fitting, support full ring faces, and verify axial float afterwards.
What are the dimensions and ratings of the C 2234 K?
A C 2234 K measures 170 mm bore × 310 mm outside diameter × 86 mm width (6.693 × 12.205 × 3.386 in). From SKF catalogue PUB BU/P1 17000: dynamic C 1270 kN, static C0 1630 kN, fatigue limit Pu 146 kN, reference speed 1,900 r/min, limiting speed 2,600 r/min, mass about 28000 g.
Can a CARB bearing like C 2234 K locate the shaft axially?
No — that is the defining feature. C 2234 K deliberately allows the inner ring to float axially inside the outer ring while the toroidal rollers self-align. It must be paired with a separate locating bearing (spherical, tapered or angular contact) that takes 100 % of the thrust.
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.