C49-1120-MB1 bearing: complete specifications & equivalents
The C49-1120-MB1 is a ISO 15 radial bearing sized 1120 x 1460 x 335 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 1120 mm |
| Outer diameter D | 1460 mm |
| Width B | 335 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 13200 kN |
| Basic static load rating C0 | 31500 kN |
| Fatigue load limit Pu | 1700 kN |
| Reference speed (thermal) | 200 rpm |
| Limiting speed (mechanical) | 260 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1630000 g |
| Manufacturer designation | C 49/1120 MB1 |
| 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 & C4900-series range
| Bore d | 44.094 in |
|---|---|
| Outer diameter D | 57.48 in |
| Width B | 13.189 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 170 mm |
| Smallest bore in C4900-series | 40 mm |
| Largest outer diameter in C4900-series | 1460 mm |
| Width range across C4900-series | 22–335 mm |
| Bore position in C4900-series (smallest first) | 3 of 3 |
| Bore above smallest C4900-series size | 1080 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the C49-1120-MB1 model number is decoded
C 49/1120 MB1 belongs to the CARB family — compact aligning roller bearings: envelope 1120×1460×335 mm, radial rating 13200/31500 kN C/C0, and no axial-locating function by design. In C 49/1120 MB1 the 49 dimension series fixes the 1460 mm OD and 335 mm width around the 1120 mm bore (the bore is written directly after the slash (no bore code)); the suffix MB1 then selects the cylindrical bore for direct shaft fitting, machined inner-ring-guided brass cage (MB). The MB1 suffix is a machined two-piece brass cage guided on the inner ring, the standard choice for wide, large-bore CARB sizes where a polymer cage would run beyond its temperature or load limit. Float capacity is a selection criterion: the catalogue lists the permissible axial displacement (s) for the 335 mm wide set; size the free-end housing so thermal growth stays within it, not just inside the overall width. Mounting: slide the bearing onto the 1120 mm seat or heat it (max 120 °C) and seat it square; never press through the 335 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
- PA66 cage (TN9) softening when the sustained temperature passes the polymer limit
- 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 1120 mm bore the 1630 kg mass and 335 mm width make seating geometry dominant: sphered-washer seats and oil flow must be verified in place, not just on the drawing.
- Reference and limiting speeds are different limits: the 200 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 13200/31500 kN ratings belong to this exact execution (C 49/1120 MB1); 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 1120 mm bore changes the sleeve family, and the drive-up procedure differs accordingly.
- Never use C 49/1120 MB1 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 13200/31500 kN ratings and 1630000 g mass are SKF catalogue values transcribed from ch. 10.1 of PUB BU/P1 17000 (PDF table page 868); 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
Can a CARB bearing like C 49/1120 MB1 locate the shaft axially?
No — that is the defining feature. C 49/1120 MB1 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 49/1120 MB1 designation read?
C = CARB toroidal family; 49 = dimension series; 1120 mm (slash-size) = 1120 mm bore (the bore is written directly after the slash (no bore code)); suffix MB1 selects cylindrical bore for direct shaft fitting, machined inner-ring-guided brass cage (MB). 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 (13200 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 49/1120 MB1 is the cylindrical bore for direct shaft fitting, machined inner-ring-guided brass cage (MB).
How is C 49/1120 MB1 mounted?
Slide or heat (max 120 °C) the bearing onto the 1120 mm seat, give the outer ring a loose housing fit, leave the float travel unobstructed, and never press through the 335 mm roller set.
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.