SKF NUP 2228 ECML/C3 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Decoding SKF NUP 2228 ECML/C3
- NUP 22Series
- Cylindrical roller bearings, NUP 22 series. Series differ in outside diameter and width even when the bore is the same.
- 28Bore
- Bore 140 mm (28 × 5).
- ECML/C3Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NUP 2228 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NUP 2228 ECML/C3 measures 140 mm across the bore and 250 mm across the outside diameter; its width is 68 mm (140 x 250 x 68 mm).
SKF NUP 2228 ECML/C3 belongs to cylindrical roller 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 NUP 2228 ECML/C3 and any equivalents.
SKF NUP series cylindrical roller bearings are designed to handle significant radial loads while also providing axial location in both directions. They are commonly found in gearboxes, machine tools, and other industrial machinery where precise shaft positioning is required. MR Industrial Accessories supplies this line to customers across the United States and Latin America.
The NUP configuration features two flanges on the inner ring and a single flange with a retaining ring on the outer ring, which enables the bearing to axially locate the shaft in both directions. The ECML suffix denotes a one-piece machined brass cage of the window type, centered on the rollers, while the C3 designation indicates radial internal clearance greater than normal. Part numbers within this series share this basic design but vary in dimensions to suit different shaft sizes.
These bearings are widely used in industries such as metallurgy, cement, mining, paper, and machine tool manufacturing. Typical applications include gearboxes, milling machine spindles, high-flow pumps, industrial fans, and transmission equipment. They are chosen where radial loads are heavy and accurate axial guidance is necessary.
When selecting a bearing, consider the radial and axial loads it will carry, the operating speed, and environmental factors. C3 clearance is beneficial when temperature differences exist between inner and outer rings or when interference fits are used. Proper mounting demands a clean environment, precise alignment, and adequate lubrication. The brass cage performs well at elevated temperatures and speeds. Since these bearings are usually open, additional sealing may be required.
For interchangeability, SKF NUP bearings can be cross-referenced with similar designs from other manufacturers that follow ISO nomenclature, such as NU, NJ, or N types. However, dimensions and tolerances can differ between brands, so always verify the complete part number and specifications before substituting. MR Industrial Accessories can assist with interchangeability guidance without compromising performance.
To request a quote for SKF NUP cylindrical roller bearings, send the full part number via WhatsApp or email to MR Industrial Accessories. Our technical team can help you identify the correct option for your equipment and answer questions about mounting and lubrication.
Dimensions
140 x 250 x 68 mm (d x D x B): boundary dimensions for basic designation NUP 2228, according to ISO 15.
- Bore
- 140mm
- Outside diameter (D)
- 250mm
- Width (B)
- 68mm
Same size, other brands
Other brands' pages with basic designation NUP 2228: 140 x 250 x 68 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 NUP 2228 ECML/C3 bearing: what are its dimensions?
- SKF NUP 2228 ECML/C3 measures 140 mm across the bore and 250 mm across the outside diameter; its width is 68 mm (140 x 250 x 68 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NUP 2228.
- What does the ECML suffix indicate on an SKF bearing?
- ECML denotes a one-piece machined brass cage that is roller-centered. This cage design is suitable for high speeds and temperatures, providing better roller guidance for more stable operation.
- When should I choose a bearing with C3 clearance?
- C3 clearance is advisable when there are temperature differences between the inner and outer rings, or when interference fits are used. It also helps in applications where thermal expansion could otherwise reduce clearance excessively.
- Do NUP bearings permit axial displacement?
- No, NUP bearings do not allow free axial displacement. They have two flanges on the inner ring and one flange with a retaining ring on the outer ring, which axially locates the shaft in both directions.