SKF 21308 EW spherical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Spherical roller 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 21308 EW
- 213Series
- Spherical roller bearings, 213 series. For the same bore, each series has a different outside diameter and width.
- 08Bore
- 40 mm bore: 08 × 5.
- EWSuffix
- SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).
21308 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The SKF 21308 EW bearing has a 40 mm bore, a 90 mm outside diameter and a 23 mm width (40 x 90 x 23 mm).
SKF 21308 EW is a reference of spherical roller bearing, within Bearings. Request a quote for 21308 EW via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
The SKF spherical roller bearing is a self-aligning component with two rows of rollers, designed to withstand high radial loads and axial loads in both directions, even when the shaft is misaligned. Its spherical outer raceway allows the assembly to self-align, absorbing mounting errors or shaft deflections. It is used in applications where rigidity is not critical but load capacity and tolerance to deflection are.
The designation of these bearings combines numbers and suffixes that indicate design features. For example, in 21308 EW, the numeric prefix identifies the series and size; the letter E indicates an optimized design with higher load capacity, and W indicates that the cage is stamped steel, suitable for high speeds and moderate temperatures. Knowing these suffixes allows you to choose the correct variant according to the application and working environment.
In Argentine industry, SKF spherical roller bearings are used in mining, cement, steel, paper and pulp equipment, and in high-capacity conveyors. They are also present in gearboxes, mills, vibrating screens and agricultural machinery, where loads are high and alignment conditions vary. Their self-aligning capability makes them ideal for long shafts or assemblies that may experience deflections.
To select correctly, take into account radial and axial load, rotation speed and environment. Sealing is key: in dusty or humid environments, choose variants with seals or shields. Lubrication must be adequate: high-viscosity grease for high loads or oil in high-speed applications. During mounting, verify initial alignment and internal clearance; although the bearing self-aligns, forced mounting can damage the rollers or raceways.
Regarding equivalences, SKF spherical roller bearings can be interchanged with those of other brands that follow the same standardized dimensions. However, load capacities and suffixes may vary between manufacturers. Always verify the complete part number and technical specifications before replacing one bearing with another of a different brand. MR Accesorios Industriales sells SKF as a brand and can advise you on selection.
If you need an SKF spherical roller bearing, send us the complete part number via WhatsApp and we will quote you promptly. At MR Accesorios Industriales we help you find the right part for your equipment.
Dimensions
Boundary dimensions of the basic designation 21308 per ISO 15: 40 x 90 x 23 mm (d x D x B).
- Bore
- 40mm
- Outside diameter (D)
- 90mm
- Width (B)
- 23mm
The same size in other brands
Pages from other brands with the basic designation 21308: 40 x 90 x 23 mm (d x D x B) per ISO 15.
- FAG21308-E1-XL21308-E1-XL-K
- NSK21308EAE421308EAKE4
- NTN21308C21308CK
- RKB21308
- TIMKEN21308EJ
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 21308 EW bearing?
- The SKF 21308 EW bearing has a 40 mm bore, a 90 mm outside diameter and a 23 mm width (40 x 90 x 23 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation 21308.
- What does the EW suffix mean on an SKF bearing?
- The EW suffix indicates that the bearing has an optimized stamped steel cage, suitable for high speeds and moderate loads. It is important to verify the complete part number to ensure compatibility with your application.
- How do I know if a spherical roller bearing is suitable for my equipment?
- You must consider radial and axial load, speed, expected misalignment and environmental conditions. Cage type, sealing and lubrication also influence the choice. Consult us with your equipment data and we will advise you.
- Do SKF bearings have equivalents with other brands?
- Yes, in general they follow dimensional standards that allow interchange, but capacities and suffixes may vary. Always compare technical specifications and consult a specialist before replacing.