SKF NU 318 ECM/C3 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
We reply promptly.
Tell us the quantity you need and request a quote by WhatsApp or email.
Other brands for this category
Ask us for alternatives. We check every equivalent against the part number and your application.
Can't find the exact model? Tell us the part number or model you need. We'll track it down and quote it, whether or not it appears in our catalog.
Decoding SKF NU 318 ECM/C3
- NU 3Series
- Cylindrical roller bearings, NU 3 series. Series differ in outside diameter and width even when the bore is the same.
- 18Bore
- Bore 90 mm (18 × 5).
- ECM/C3Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NU 318 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NU 318 ECM/C3 measures 90 mm across the bore and 190 mm across the outside diameter; its width is 43 mm (90 x 190 x 43 mm).
SKF NU 318 ECM/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 NU 318 ECM/C3 and any equivalents.
SKF NU series cylindrical roller bearings with an ECM cage and C3 internal clearance are built for high radial loads and considerable speeds. Their separable design and precise roller alignment suit demanding industrial drives. MR Industrial Accessories LLC supplies these bearings as part of its SKF range for customers in the United States, Canada, Mexico and South America.
Reading the code helps you confirm what you are ordering. NU means the outer ring has two ribs and the inner ring none, so the shaft can move axially. The following number is the size code from the dimension series. ECM identifies a one-piece machined brass cage guided by the rollers, and C3 indicates internal radial clearance above normal. For instance, NU 207 ECM/C3 brings those features together in one size.
These bearings appear in steel, cement, mining, paper and heavy machinery manufacturing. They are common in gearboxes, high-flow pumps, industrial fans, machine tools and power transmission equipment. High radial load capacity and rigidity make them a fit where precision and durability matter.
Selection depends on radial load, rotation speed and the operating environment. Choose C3 clearance when thermal gradients or interference fits are present. At installation, verify alignment and lubrication; the ECM cage supports lubricant flow. Check sealing, and add protection if dust or moisture is present. Follow the manufacturer's instructions for mounting and axial fixing.
For equivalents, SKF NU bearings with ECM cage and C3 clearance can be interchanged with other brands that use the same standardized designation. Tolerances and internal design can differ, so verify the technical data before substituting. Contact us if you need help identifying a replacement.
To request a quote, send the exact bearing code by WhatsApp or email to MR Industrial Accessories LLC. Our team replies promptly, can suggest equivalents and helps you choose the right bearing for the application.
Dimensions
90 x 190 x 43 mm (d x D x B): boundary dimensions for basic designation NU 318, according to ISO 15.
- Bore
- 90mm
- Outside diameter (D)
- 190mm
- Width (B)
- 43mm
Same size, other brands
Other brands' pages with basic designation NU 318: 90 x 190 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 NU 318 ECM/C3 bearing: what are its dimensions?
- SKF NU 318 ECM/C3 measures 90 mm across the bore and 190 mm across the outside diameter; its width is 43 mm (90 x 190 x 43 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 318.
- What does the ECM suffix mean on an SKF bearing?
- ECM indicates a one-piece machined brass cage, roller-guided. It is used in applications requiring higher strength and speed capability than stamped steel cages.
- When should I choose a bearing with C3 clearance?
- C3 clearance suits cases with thermal differences between rings, interference fits or high speeds. It gives extra margin for thermal expansion and helps avoid premature seizure.
- How do I know if an NU bearing can replace one from a different brand?
- Check that the standardized designation matches, including series, diameter and suffixes. Main dimensions are often interchangeable, but tolerances and internal design may vary. Send us the original code to confirm the equivalent.