SKF 21318 EK spherical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Spherical roller bearings
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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 21318 EK
- 213Series
- Spherical roller bearings, 213 series. For the same bore, each series has a different outside diameter and width.
- 18Bore
- 90 mm bore: 18 × 5.
- EKSuffix
- SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).
21318 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The SKF 21318 EK bearing has a 90 mm bore, a 190 mm outside diameter and a 43 mm width (90 x 190 x 43 mm).
SKF 21318 EK is a reference of spherical roller bearing, within Bearings. Request a quote for 21318 EK via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
SKF spherical roller bearings are self-aligning components with two rows of rollers, designed to support high radial loads and axial loads in both directions, even when the shaft is misaligned. Their self-aligning design compensates for mounting errors or shaft deflection, making them ideal for demanding industrial applications. At MR Accesorios Industriales we sell the SKF brand, a world reference in bearings.
The series designation is interpreted as follows: the base number (for example, 22205) indicates the size and load capacity; the suffix EK indicates that the bearing has a tapered bore (taper 1:12) for mounting with an adapter sleeve. Remember that series 213, 222 and 223 have different characteristics. Always verify the complete part number in the SKF catalogue.
These bearings are used in mining equipment, cement plants, steel mills, pulp plants, chain conveyors, mills, crushers, vibrating screens and agricultural machinery. In Argentina, they are common in the food industry, petrochemical industry and aggregate processing plants. Their ability to withstand heavy loads and misalignment makes them suitable for environments with dust, vibration or shock. They are also used in industrial fans, large centrifugal pumps and speed reducers.
To select correctly, take into account the radial and axial load, the rotation speed, the type of lubrication (grease or oil), the sealing (open, with shields or with seals) and the internal clearance. Mounting with a tapered bore requires an adapter sleeve and a precision lock nut; it is essential to control the residual clearance after tightening. Initial alignment is not critical thanks to self-alignment, but careful mounting extends service life. Lubrication must be suitable for the operating temperature and speed.
Regarding equivalences, SKF spherical roller bearings can be interchanged with those of other brands that follow the same standardized dimensions, such as FAG, NSK, NTN or Timken, as long as the base number and suffixes match. However, tolerances and internal clearances may vary between manufacturers, so it is recommended to verify the technical data sheet of each brand. MR Accesorios Industriales sells SKF, and can advise you on interchangeability with other references.
If you need an SKF spherical roller bearing, send us the complete part number by WhatsApp. At MR Accesorios Industriales we will quote you promptly and help you choose the right adapter sleeve, lock nut and lubrication. We have a technical team ready to answer your questions.
Dimensions
Boundary dimensions of the basic designation 21318 per ISO 15: 90 x 190 x 43 mm (d x D x B).
- Bore
- 90mm
- Outside diameter (D)
- 190mm
- Width (B)
- 43mm
The same size in other brands
Pages from other brands with the basic designation 21318: 90 x 190 x 43 mm (d x D x B) per ISO 15.
- FAG21318-E1-XL21318-E1-XL-K
- NSK21318EAE421318EAKE4
- NTN2131821318K
- RKB21318
- TIMKEN21318EJ
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 21318 EK bearing?
- The SKF 21318 EK bearing has a 90 mm bore, a 190 mm outside diameter and a 43 mm width (90 x 190 x 43 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation 21318.
- What does the EK suffix mean on an SKF bearing?
- The EK suffix indicates that the bearing has a tapered bore with 1:12 taper, which allows it to be mounted with an adapter sleeve. This facilitates adjustment of the internal clearance and mounting on cylindrical shafts. It is important to use the correct adapter sleeve and to check the clearance after mounting.
- How do I choose between an open and a sealed bearing?
- The choice depends on the environment: if there is dust, moisture or contaminants, a sealed bearing (with shields or seals) is preferable. If the bearing is lubricated from a central system or the speed is high, it can be open. Consult us with your application data for advice.
- Can I replace an SKF bearing with another brand?
- Yes, if the standardized dimensions and the base number match. Brands such as FAG, NSK or NTN have equivalents, but verify tolerances and internal clearance. At MR Accesorios Industriales we sell SKF and can guide you on interchangeability.