C3138-V bearing: complete specifications & equivalents
The C3138-V is a ISO 15 radial bearing sized 190 x 320 x 104 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 190 mm |
| Outer diameter D | 320 mm |
| Width B | 104 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 1700 kN |
| Basic static load rating C0 | 2550 kN |
| Fatigue load limit Pu | 224 kN |
| Limiting speed (mechanical) | 190 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 34000 g |
| Manufacturer designation | C 3138 V |
| 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 & C3100-series range
| Bore d | 7.48 in |
|---|---|
| Outer diameter D | 12.598 in |
| Width B | 4.094 in |
| ISO bore code | 38 |
| Radial section height (D−d)/2 | 65 mm |
| Smallest bore in C3100-series | 100 mm |
| Largest outer diameter in C3100-series | 1580 mm |
| Width range across C3100-series | 52–462 mm |
| Bore position in C3100-series (smallest first) | 5 of 28 |
| Bore above smallest C3100-series size | 90 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C3138-KV | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 190×320×104 mm ISO 15 envelope and equivalent catalogue C/C0; C 3138 KV is the 1:12 tapered-bore K full-complement V execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| 23138 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 190×320×104 mm envelope as the SKF spherical roller bearing SKF 23138 CC/W33, but catalogue C/C0 differ (1700/2550 kN vs 1456/2080 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
| 23138-CCK-W33 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 190×320×104 mm envelope as the SKF spherical roller bearing SKF 23138 CCK/W33, but catalogue C/C0 differ (1700/2550 kN vs 1456/2080 kN) — and the functions differ: spherical locates axially, CARB floats. Pair them; never swap one-for-one. |
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 C3138-V model number is decoded
SKF lists C 3138 V in the dimension series 31 CARB toroidal roller bearings: the toroidal roller profile both follows tolerates angular misalignment and lets the inner ring slide axially inside the outer ring, giving free axial displacement at the non-locating position. In C 3138 V the 31 dimension series fixes the 320 mm OD and 104 mm width around the 190 mm bore (code 38 × 5); the suffix V then selects the cylindrical bore for direct shaft fitting, full-complement V execution (no cage). The cylindrical 190 mm bore mounts directly on a machined seat; the outer ring takes a loose housing fit so the bearing can float axially. The same size is listed in both bore executions, and the boundary dimensions 190×320×104 mm are identical — only the mounting method changes. No thermal reference speed is listed for this full-complement execution; the mechanical limiting speed is 190 r/min. The full-complement V executions carry more load but list no thermal reference speed; the steel-caged executions run faster and cooler at light load. Mounting: slide the bearing onto the 190 mm seat or heat it (max 120 °C) and seat it square; never press through the 104 mm roller set, and leave the free-end housing shoulder clear so axial float is unrestricted.
Typical equipment & failure modes
Common applications
- vibrating screen exciters fitted with the VE240 tolerance execution
- long fan and kiln main shafts where the free end must float without thrust load
- heavy industrial gearbox layshafts used as the non-locating position
- winder and reel drums in paper and steel strip plants
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after sustained overload
- roller skew and cage damage after the bearing is clamped solid between shaft and housing shoulders
- 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
- grease churning and overheating when a high-speed thrust position is over-packed
Selection pitfalls — read before you substitute
- At 190 mm bore, shaft expansion is already measurable: calculate the required float inside the 104 mm wide bearing rather than assuming the free-end clearance is "enough" at operating temperature.
- Never use C 3138 V 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 190 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- Envelope-identical spherical roller bearings (same ISO 15 d×D×B) are not drop-in equivalents — they locate the shaft axially, while C 3138 V must float; the two are designed to be used as a pair.
- Reference and limiting speeds are different limits: the catalogue lists no thermal reference speed for this full-complement/sealed execution, the limiting value is the mechanical ceiling; observe the reference under load unless the arrangement calculation says otherwise.
- The 1700/2550 kN ratings and 34000 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 864); 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
How is C 3138 V mounted?
Slide or heat (max 120 °C) the bearing onto the 190 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 104 mm roller set.
What are the dimensions and ratings of the C 3138 V?
A C 3138 V measures 190 mm bore × 320 mm outside diameter × 104 mm width (7.48 × 12.598 × 4.094 in). From SKF catalogue PUB BU/P1 17000: dynamic C 1700 kN, static C0 2550 kN, fatigue limit Pu 224 kN, limiting speed 190 r/min, no reference speed listed, mass about 34000 g.
Can a CARB bearing like C 3138 V locate the shaft axially?
No — that is the defining feature. C 3138 V 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 3138 V designation read?
C = CARB toroidal family; 31 = dimension series; 38 = 190 mm bore (code 38 × 5); suffix V selects cylindrical bore for direct shaft fitting, full-complement V execution (no cage). K is a 1:12 tapered bore for an adapter sleeve, K30 a 1:30 bore for a withdrawal sleeve.
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.