SKF 2311 M/C3 self-aligning ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Self-aligning ball bearings
We respond promptly.
Since 1945 · Martínez, Buenos Aires, Argentina
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Other brands in this category
Ask us about alternatives. Equivalence is verified for each reference and application.
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How to read SKF 2311 M/C3
- 23Series
- Self-aligning ball bearings, 23 series. For the same bore, each series has a different outside diameter and width.
- 11Bore
- 55 mm bore: 11 × 5.
- M/C3Suffix
- SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).
2311 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The SKF 2311 M/C3 bearing has a 55 mm bore, a 120 mm outside diameter and a 43 mm width (55 x 120 x 43 mm).
SKF 2311 M/C3 is a reference of self-aligning ball bearing, within Bearings. Request a quote for 2311 M/C3 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
SKF self-aligning ball bearings are double-row ball bearings with a spherical raceway in the outer ring, which allows them to align automatically and accommodate angular misalignment between shaft and housing. They are used in equipment where perfect alignment cannot be guaranteed, such as fans, pumps, conveyors and agricultural machinery. MR Accesorios Industriales carries this line as a brand, with technical advice to choose the right part number.
The designation of these bearings follows a clear scheme. In series 22 and 23, the first two digits indicate the dimension series: 22 corresponds to a lighter section and 23 to a more robust one. The M suffix indicates that the cage is machined brass, suitable for higher demands. The /C3 suffix indicates an internal radial clearance greater than standard, useful when the fit or working temperature generates expansion. For example, 2312 M/C3 is a series 23 self-aligning ball bearing with brass cage and C3 clearance.
These bearings are used in equipment where there is shaft deflection or alignment difficulties. In Argentine industry they are found in centrifugal fans, centrifugal pumps, conveyor belts, vibrating screens, agricultural machinery and process equipment. Also in belt drives where tension can slightly misalign the shafts. Their self-aligning capability reduces the risk of premature failures due to imperfect mounting.
To select correctly, take into account the load: these bearings support radial and moderate axial loads in both directions. C3 clearance is recommended when the fit is tight or there are thermal gradients. Lubrication must be adequate: grease or oil depending on speed and environment. It is essential to check the initial alignment and sealing, especially in dusty or humid environments. Mounting with the right tools prevents damage to the rings.
As for equivalences, SKF self-aligning ball bearings can be interchanged with those of other brands that follow the same dimensional designation, such as FAG, NSK or NTN. However, always check the cage and clearance suffix, because not all brands use the same nomenclature. Interchangeability is dimensional, but performance may vary by manufacturer. Contact us if you need to replace an existing part number.
If you already have the part number of your SKF self-aligning ball bearing, send it by WhatsApp to MR Accesorios Industriales and we'll quote you. If you don't have it on hand, we can help you identify it with the shaft and housing dimensions. We advise you with technical criteria and no runaround.
Dimensions
Boundary dimensions of the basic designation 2311 per ISO 15: 55 x 120 x 43 mm (d x D x B).
- Bore
- 55mm
- Outside diameter (D)
- 120mm
- Width (B)
- 43mm
The same size in other brands
Pages from other brands with the basic designation 2311: 55 x 120 x 43 mm (d x D x B) per ISO 15.
They share the boundary dimensions set by ISO 15, not the technical data: seals or shields, internal clearance, cage and load rating can differ by brand and suffix. We quote each one by its full part number.
Frequently Asked Questions
- What are the dimensions of the SKF 2311 M/C3 bearing?
- The SKF 2311 M/C3 bearing has a 55 mm bore, a 120 mm outside diameter and a 43 mm width (55 x 120 x 43 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation 2311.
- What does the C3 suffix mean in an SKF self-aligning ball bearing?
- The C3 suffix indicates an internal radial clearance greater than standard. It is used when the interference fit or working temperatures can reduce the clearance, preventing the bearing from becoming preloaded and failing prematurely.
- Can I replace an SKF self-aligning ball bearing with one from another brand?
- Yes, if the main dimensions and the cage and clearance type match. The dimensional designation is usually compatible between brands, but check the suffixes, as they may vary. Contact us and we'll help you validate the equivalence.
- How do I know if I need a self-aligning ball bearing instead of a deep groove ball bearing?
- If the shaft can become misaligned due to deflection, mounting or thermal expansion, the self-aligning bearing compensates for those deviations. If alignment is perfect and loads are normal, a deep groove ball bearing may be sufficient and more economical.