C3196-KMB bearing: complete specifications & equivalents
The C3196-KMB is a ISO 15 radial bearing sized 480 x 790 x 248 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 480 mm |
| Outer diameter D | 790 mm |
| Width B | 248 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 6950 kN |
| Basic static load rating C0 | 12500 kN |
| Fatigue load limit Pu | 830 kN |
| Reference speed (thermal) | 560 rpm |
| Limiting speed (mechanical) | 750 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 523000 g |
| Manufacturer designation | C 3196 KMB |
| 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 | 18.898 in |
|---|---|
| Outer diameter D | 31.102 in |
| Width B | 9.764 in |
| ISO bore code | 96 |
| Radial section height (D−d)/2 | 155 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) | 20 of 28 |
| Bore above smallest C3100-series size | 380 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C3196-MB | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 480×790×248 mm ISO 15 envelope and equivalent catalogue C/C0; C 3196 MB is the cylindrical-bore MB inner-ring-guided brass-caged execution of this size — boundary dimensions interchangeable, only mounting and cage execution differ. |
| 23196 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (480×790×248 mm) SKF spherical roller bearing SKF 23196 CA/W33 with ratings within 10 % — not a drop-in substitute: SKF 23196 CA/W33 locates the shaft axially while the CARB bearing must float; the two are designed to run as a locating/non-locating pair. |
| 23196-CAK-W33 | SKF | full Dimensions and internal design equivalent — standard interchange. | Envelope-identical (480×790×248 mm) SKF spherical roller bearing SKF 23196 CAK/W33 with ratings within 10 % — not a drop-in substitute: SKF 23196 CAK/W33 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 C3196-KMB model number is decoded
C 3196 KMB is the dimension series 31 CARB toroidal roller bearings member of the CARB range: 480 mm bore, 790 mm OD, 248 mm width, with the asymmetrical-looking toroidal roller set that defines the CARB principle. The designation C 3196 KMB separates into C (CARB), 31 (dimension series), 96 (480 mm bore) and KMB (tapered 1:12 bore for adapter (H) sleeve mounting, machined inner-ring-guided brass cage (MB)); envelope 480×790×248 mm follows the ISO 15 plan. The K suffix gives a 1:12 tapered 480 mm bore, mounted on an adapter (H) sleeve so the bearing can be driven up to the specified clearance. The same size is listed in both bore executions, and the boundary dimensions 480×790×248 mm are identical — only the mounting method changes. Pairing rule: use the CARB bearing opposite one locating spherical or tapered bearing — never at both shaft ends — and check the locating bearing takes 100 % of the thrust, since C 3196 KMB deliberately carries none. 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 248 mm wide cavity does not fill itself.
Typical equipment & failure modes
Common applications
- 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
- heavy industrial gearbox layshafts used as the non-locating position
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
- brass cage pocket wear under marginal lubrication in the large-bore M/MB executions
- hard-particle indentation where oil or grease filtration is inadequate
- oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips
Selection pitfalls — read before you substitute
- Above 200 mm bore these bearings weigh tens of kilograms (523 kg here) — lifting gear and induction heating are mandatory, and a cocked ring scores the toroidal raceway before start-up.
- 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.
- Envelope-identical spherical roller bearings (same ISO 15 d×D×B) are not drop-in equivalents — they locate the shaft axially, while C 3196 KMB must float; the two are designed to be used as a pair.
- Never use C 3196 KMB 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 480 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- The 6950/12500 kN ratings and 523000 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.
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 (6950 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 3196 KMB is the tapered 1:12 bore for adapter (H) sleeve mounting, machined inner-ring-guided brass cage (MB).
How is C 3196 KMB 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 3196 KMB?
A C 3196 KMB measures 480 mm bore × 790 mm outside diameter × 248 mm width (18.898 × 31.102 × 9.764 in). From SKF catalogue PUB BU/P1 17000: dynamic C 6950 kN, static C0 12500 kN, fatigue limit Pu 830 kN, reference speed 560 r/min, limiting speed 750 r/min, mass about 523000 g.
Can a CARB bearing like C 3196 KMB locate the shaft axially?
No — that is the defining feature. C 3196 KMB 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.