SKF 2309 EM self-aligning ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Self-aligning ball bearings
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Other brands for this category
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Decoding SKF 2309 EM
- 23Series
- Self-aligning ball bearings, 23 series. Series differ in outside diameter and width even when the bore is the same.
- 09Bore
- Bore 45 mm (09 × 5).
- EMSuffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
2309 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 2309 EM measures 45 mm across the bore and 100 mm across the outside diameter; its width is 36 mm (45 x 100 x 36 mm).
SKF 2309 EM 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 2309 EM and any equivalents.
When shaft deflection or imperfect housing alignment is a factor, the SKF EM series self-aligning ball bearing is a practical solution. Its double-row design with a spherical outer raceway lets the bearing adjust to angular misalignment between shaft and housing. This makes it suitable for fans, pumps, conveyors and agricultural equipment, where mounting conditions are not always ideal. The bearing handles moderate radial and axial loads in both directions.
The EM suffix in the part number indicates a machined brass cage and higher-capacity balls. Examples include 1206 EM, 1308 EM, 2307 EM, 2308 EM and 2309 EM. To read the code, look at the basic number: the first digits (12, 13 or 23) define the dimensional series, which relates to width and diameter ratios. The final two digits give the bore diameter in coded form. For a detailed interpretation of a specific code, send us the complete number.
These bearings are commonly found in industrial fans, centrifugal pumps, belt conveyors, food processing machines, milling equipment and agricultural machinery. They also appear in dryers, mixers and transmission systems where the housing may not be perfectly rigid. The self-aligning feature helps reduce wear when small parallelism or angularity errors are present.
Selection depends on radial and axial load, rotational speed and the operating environment. In dusty or wet conditions, consider variants with seals or shields. Lubrication should be appropriate and renewed according to the duty cycle. During mounting, check initial alignment and avoid impacts that could damage the balls or raceway, as incorrect fitting can cancel the self-aligning capability. If you need help, share your equipment data and we will advise you.
Self-aligning ball bearings from different brands often share standardized dimensions, so they are usually interchangeable if the type, dimensional series and execution suffix match. However, cage, sealing or internal clearance may differ between manufacturers. Before replacing, compare the full code and service conditions. We supply SKF and can help you find a suitable alternative for your application.
To request a quote for an SKF EM series self-aligning ball bearing, send the full code via WhatsApp or email. Our team will confirm the size and execution that fits your equipment and suggest equivalents if needed.
Dimensions
45 x 100 x 36 mm (d x D x B): boundary dimensions for basic designation 2309, according to ISO 15.
- Bore
- 45mm
- Outside diameter (D)
- 100mm
- Width (B)
- 36mm
Same size, other brands
Other brands' pages with basic designation 2309: 45 x 100 x 36 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 2309 EM bearing: what are its dimensions?
- SKF 2309 EM measures 45 mm across the bore and 100 mm across the outside diameter; its width is 36 mm (45 x 100 x 36 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 2309.
- What does the EM suffix mean on an SKF self-aligning ball bearing?
- The EM suffix denotes an execution with a machined brass cage and higher-capacity balls. This configuration is often used in demanding applications where robustness and heat dissipation are important. To confirm the exact variant, check the full code.
- How do I choose between a self-aligning ball bearing and a deep groove ball bearing?
- Choose a self-aligning ball bearing when shaft flex or housing misalignment is possible, because its spherical raceway allows self-alignment. If alignment is precise and no misalignment exists, a deep groove ball bearing may be sufficient. Also consider loads and speeds.
- Are SKF EM series self-aligning ball bearings interchangeable with other brands?
- In general, they are interchangeable if the standardized dimensions, type and execution suffix match. But cage, sealing or internal clearance may vary between manufacturers. Before replacing, compare the full code and ask us to ensure compatibility.