C3196-MB bearing: complete specifications & equivalents
The C3196-MB 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 MB |
| 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-KMB | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 480×790×248 mm ISO 15 envelope and equivalent catalogue C/C0; C 3196 KMB is the 1:12 tapered-bore K 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-MB model number is decoded
In SKF catalogue PUB BU/P1 17000, C 3196 MB denotes a toroidal roller bearing whose 248 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 3196 MB separates into C (CARB), 31 (dimension series), 96 (480 mm bore) and MB (cylindrical bore for direct shaft fitting, machined inner-ring-guided brass cage (MB)); envelope 480×790×248 mm follows the ISO 15 plan. The cylindrical 480 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 480×790×248 mm are identical — only the mounting method changes. Float capacity is a selection criterion: the catalogue lists the permissible axial displacement (s) for the 248 mm wide set; size the free-end housing so thermal growth stays within it, not just inside the overall width. After fitting, confirm the inner ring can be pushed axially by hand through the catalogue displacement range; a ring that will not slide means the position is locked and will preload in service.
Typical equipment & failure modes
Common applications
- 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
- paper machine drying cylinders and calender rolls with long, thermally expanding shafts
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
- condensation pitting in machines that run intermittently in humid environments
- 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 MB must float; the two are designed to be used as a pair.
- Reference and limiting speeds are different limits: the 560 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 6950/12500 kN ratings belong to this exact execution (C 3196 MB); VE240 vibrating-screen variants and sealed 2CS/2NS variants have their own figures even at the same envelope.
- 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 MB is the cylindrical bore for direct shaft fitting, machined inner-ring-guided brass cage (MB).
How is C 3196 MB mounted?
Slide or heat (max 120 °C) the bearing onto the 480 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 248 mm roller set.
What are the dimensions and ratings of the C 3196 MB?
A C 3196 MB 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 MB locate the shaft axially?
No — that is the defining feature. C 3196 MB 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.