SKF 2311 self-aligning ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Self-aligning ball bearings
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Other brands for this category
Ask us for alternatives. We check every equivalent against the part number and your application.
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Decoding SKF 2311
- 23Series
- Self-aligning ball bearings, 23 series. Series differ in outside diameter and width even when the bore is the same.
- 11Bore
- Bore 55 mm (11 × 5).
2311 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 2311 measures 55 mm across the bore and 120 mm across the outside diameter; its width is 43 mm (55 x 120 x 43 mm).
SKF 2311 belongs to self-aligning ball bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 2311 and any equivalents.
When a shaft and its housing are not perfectly aligned, a self-aligning ball bearing can absorb that angular misalignment. Its two rows of balls run on a common spherical outer raceway, so deflection or mounting error does not translate into extra load on the balls.
The part number is a four-digit designation that defines the size. In the smaller sizes, these bearings typically do not include sealing suffixes, while sealed versions are available in larger diameters.
Typical uses include long shafts that deflect under load, equipment where precise alignment between shaft and support is difficult to achieve, and applications where tolerating misalignment matters more than maximum load capacity. Compared with a deep groove ball bearing of the same size, the self-aligning design carries less radial load.
That lower capacity means it is not the first option when alignment is already correct. In those cases, a deep groove ball bearing or a cylindrical roller bearing of the same size is a better fit. The self-aligning bearing earns its place when there is actual misalignment to absorb.
Bore, outside diameter and width for this series are standardized across major bearing manufacturers, so an equivalent from another brand is often available for the same size.
Send the part number or the bearing dimensions via WhatsApp or email, and we will confirm a suitable equivalent. MR Industrial Accessories supplies SKF self-aligning ball bearings.
Dimensions
55 x 120 x 43 mm (d x D x B): boundary dimensions for basic designation 2311, according to ISO 15.
- Bore
- 55mm
- Outside diameter (D)
- 120mm
- Width (B)
- 43mm
Same size, other brands
Other brands' pages with basic designation 2311: 55 x 120 x 43 mm (d x D x B) per ISO 15.
What they share are the ISO 15 boundary dimensions, not the specs: seals or shields, internal clearance, cage and load rating may vary with brand and suffix. Every quote is by full part number.
Frequently asked questions
- SKF 2311 bearing: what are its dimensions?
- SKF 2311 measures 55 mm across the bore and 120 mm across the outside diameter; its width is 43 mm (55 x 120 x 43 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 2311.
- When should I choose a self-aligning ball bearing over a rigid one?
- Choose it when there is real misalignment between shaft and housing, caused by shaft deflection or mounting difficulty. If alignment is correct, a deep groove ball bearing of the same size is a better choice.
- Why does it have less load capacity than a deep groove ball bearing?
- Its internal geometry is designed to absorb angular misalignment, which reduces radial load capacity compared with a rigid design of the same size.
- Are sealed versions available?
- Yes, sealed variants exist in the larger sizes. Let us know the diameter and we will confirm the options.