SKF NJ 311 ECP/C4VQ015 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 NJ 311 ECP/C4VQ015
- NJ 3Series
- Cylindrical roller bearings, NJ 3 series. Series differ in outside diameter and width even when the bore is the same.
- 11Bore
- Bore 55 mm (11 × 5).
- ECP/C4VQ015Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NJ 311 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NJ 311 ECP/C4VQ015 measures 55 mm across the bore and 120 mm across the outside diameter; its width is 29 mm (55 x 120 x 29 mm).
SKF NJ 311 ECP/C4VQ015 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 NJ 311 ECP/C4VQ015 and any equivalents.
The SKF NJ ECP line covers single-row cylindrical roller bearings built around a polyamide cage, intended for high radial loads and considerable speeds. Because the design permits axial movement in one direction, these bearings suit arrangements where the shaft grows with temperature. MR Industrial Accessories supplies this series and can help you match the correct variant to the application.
Reading the code helps you order the right replacement. NJ means the inner ring carries two ribs while the outer ring carries one, so relative axial displacement is possible in a single direction. ECP points to an optimized execution that uses a polyamide cage. Suffixes add further detail: in NJ 306 ECP/C4VQ015 and NJ 2314 ECP/C4VQ015, C4 denotes radial clearance above normal and VQ015 identifies a special execution.
Typical users are found in metallurgy, cement, mining and food processing, on pumps, compressors, conveyor belts and machine tools. Where high radial capacity and rigidity are required, such as gearboxes and large electric motors, this series is a frequent choice. Its capacity for combined loads at moderate speeds makes it a practical item to keep in an industrial maintenance program.
Selection should start from radial and axial load, rotation speed and the surrounding conditions. Where dust or moisture is present, look at sealed variants. Use the lubricant specified by the manufacturer, and during mounting keep alignment precise and use the proper tools so the rollers are not damaged. C4 clearance fits high-temperature duty or interference fits.
Bearings from other makers that carry the same dimensional and execution designation, among them FAG, NSK or NTN, may serve as equivalents, provided tolerances and clearance are checked. Rely on interchangeability tables rather than the code alone, since cages or heat treatments can differ. MR Industrial Accessories can review the substitution with you.
For a quote on an SKF NJ ECP bearing, send the complete part number by WhatsApp or email. The team replies promptly, helps you identify the exact variant and answers technical questions.
Dimensions
55 x 120 x 29 mm (d x D x B): boundary dimensions for basic designation NJ 311, according to ISO 15.
- Bore
- 55mm
- Outside diameter (D)
- 120mm
- Width (B)
- 29mm
Same size, other brands
Other brands' pages with basic designation NJ 311: 55 x 120 x 29 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 NJ 311 ECP/C4VQ015 bearing: what are its dimensions?
- SKF NJ 311 ECP/C4VQ015 measures 55 mm across the bore and 120 mm across the outside diameter; its width is 29 mm (55 x 120 x 29 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NJ 311.
- What does the NJ ECP designation mean on an SKF bearing?
- NJ describes the rib arrangement: two ribs on the inner ring, one on the outer ring, which allows axial displacement in one direction. ECP refers to an optimized design with a polyamide cage. Suffixes such as C4VQ015 indicate increased radial clearance and special execution features.
- What is the difference between an NJ and an NU bearing?
- The rib arrangement separates them. NJ has two ribs on the inner ring and one on the outer ring, so axial displacement works in one direction only. NU has two ribs on the outer ring and none on the inner ring, allowing displacement in both directions. Both handle high radial loads.
- Can I replace an SKF NJ ECP bearing with another brand?
- It is possible when the dimensional and execution designation matches. FAG, NSK or NTN offer equivalents. Tolerances, clearance and cage type should be verified, as they can differ. MR Industrial Accessories can validate interchangeability before you purchase.