C2314-K bearing: complete specifications & equivalents
The C2314-K is a ISO 15 radial bearing sized 70 x 150 x 51 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 70 mm |
| Outer diameter D | 150 mm |
| Width B | 51 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 405 kN |
| Basic static load rating C0 | 430 kN |
| Fatigue load limit Pu | 49 kN |
| Reference speed (thermal) | 3800 rpm |
| Limiting speed (mechanical) | 5000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4300 g |
| Manufacturer designation | C 2314 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 & C2300-series range
| Bore d | 2.756 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 2.008 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 40 mm |
| Smallest bore in C2300-series | 70 mm |
| Largest outer diameter in C2300-series | 280 mm |
| Width range across C2300-series | 51–93 mm |
| Bore position in C2300-series (smallest first) | 1 of 8 |
| Bore above smallest C2300-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C2314 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 70×150×51 mm ISO 15 envelope and equivalent catalogue C/C0; C 2314 is the cylindrical-bore steel-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| 22314 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (70×150×51 mm) SKF spherical roller bearing SKF 22314 E with ratings within 10 % — not a drop-in substitute: SKF 22314 E locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
| 22314-EK | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (70×150×51 mm) SKF spherical roller bearing SKF 22314 EK with ratings within 10 % — not a drop-in substitute: SKF 22314 EK 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 C2314-K model number is decoded
The CARB bearing C 2314 K combines the self-aligning behaviour of a spherical roller bearing with the axial freedom of a cylindrical bearing in one 70 mm bore, 150 mm outside diameter, 51 mm wide unit rated 405 kN dynamic. The designation C 2314 K separates into C (CARB), 23 (dimension series), 14 (70 mm bore) and K (tapered 1:12 bore for adapter (H) sleeve mounting, pressed steel cage); envelope 70×150×51 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 70 mm shaft deflects; the 3,800 r/min reference and 5,000 r/min limiting speed are both catalogue values. The 4300 g mass over the 70×150×51 mm envelope yields about 5.79 kN dynamic per millimetre of bore — the long toroidal rollers give this family its radial capacity density. Mounting: mount on the adapter (H) sleeve matched to the 1:12 tapered bore, drive up to the catalogue reduction and lock the nut; never press through the 51 mm roller set, and leave the free-end housing shoulder clear so axial float is unrestricted.
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
- thermal preloading when a shaft is located at both ends and growth has nowhere to go
- 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
- oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips
Selection pitfalls — read before you substitute
- At 70 mm bore the small CARB executions are unusually wide (51 mm) for their 150 mm OD — confirm the housing width before substituting a standard spherical bearing of the same bore.
- Reference and limiting speeds are different limits: the 3,800 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 405/430 kN ratings belong to this exact execution (C 2314 K); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- Tapered-bore K executions mount on adapter sleeves (1:12) and K30 on withdrawal sleeves (1:30) — the 70 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- Never use C 2314 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.
- The 405/430 kN ratings and 4300 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.
Frequently asked questions
What are the dimensions and ratings of the C 2314 K?
A C 2314 K measures 70 mm bore × 150 mm outside diameter × 51 mm width (2.756 × 5.906 × 2.008 in). From SKF catalogue PUB BU/P1 17000: dynamic C 405 kN, static C0 430 kN, fatigue limit Pu 49 kN, reference speed 3,800 r/min, limiting speed 5,000 r/min, mass about 4300 g.
Can a CARB bearing like C 2314 K locate the shaft axially?
No — that is the defining feature. C 2314 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.
How is the C 2314 K designation read?
C = CARB toroidal family; 23 = dimension series; 14 = 70 mm bore (code 14 × 5); suffix K selects tapered 1:12 bore for adapter (H) sleeve mounting, pressed steel cage. K is a 1:12 tapered bore for an adapter sleeve, K30 a 1:30 bore for a withdrawal sleeve.
What is the difference between V and TN9 CARB executions?
V is the full-complement execution with no cage — more rollers, higher C (405 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 2314 K is the tapered 1:12 bore for adapter (H) sleeve mounting, pressed steel cage.
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.