SKF NUP 311 ECNM/C3 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical 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 NUP 311 ECNM/C3
- NUP 3Series
- Cylindrical roller bearings, NUP 3 series. For the same bore, each series has a different outside diameter and width.
- 11Bore
- 55 mm bore: 11 × 5.
- ECNM/C3Suffix
- SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).
NUP 311 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The SKF NUP 311 ECNM/C3 bearing has a 55 mm bore, a 120 mm outside diameter and a 29 mm width (55 x 120 x 29 mm).
SKF NUP 311 ECNM/C3 is a reference of cylindrical roller bearing, within Bearings. Request a quote for NUP 311 ECNM/C3 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
The SKF NUP ECNM/C series cylindrical roller bearing is a high radial capacity component designed to withstand combined loads and tilting moments. Its design with a double flange on the inner ring and one flange on the outer ring allows axial location in both directions, making it ideal for applications requiring precise axial location. It is a robust solution for industrial machinery operating at moderate speeds and high loads.
The NUP ECNM/C designation is interpreted as follows: NUP indicates a cylindrical roller bearing with a double flange on the inner ring and one flange on the outer ring, which allows axial guidance in both directions. EC indicates an optimized design with higher load capacity and modified profile rollers. NM corresponds to a machined brass cage, and /C3 specifies an internal radial clearance greater than standard. For example, the code NUP 311 ECNM/C3 combines these characteristics in a series 3 size.
This type of bearing is used in industrial applications requiring high rigidity and radial load capacity, such as gearboxes, high-flow pumps, compressors, machine tools and power transmission equipment. In Argentina, it is commonly found in the food, petrochemical and steel industries and in cement and mining production plants. Its ability to withstand combined loads makes it suitable for transmission shafts and spindles where precise axial positioning is required.
To correctly select an NUP ECNM/C bearing, take into account the radial and axial load it must withstand, the rotation speed and the environmental conditions. The C3 internal clearance is recommended when there are thermal differences between shaft and housing or when interference fits are expected. Assembly must be carried out with suitable tools, avoiding direct impacts on the rollers. Lubrication can be with grease or oil, depending on the application, and it is essential to maintain precise alignment between shaft and housing to avoid parasitic loads.
Regarding equivalences and interchangeability, cylindrical roller bearings of this series can be found in other brands under similar designations, although the suffix letters may vary. It is important to verify the main dimensions (bore, outer diameter and width) and the cage type before replacing one bearing with another. At MR Accesorios Industriales we supply the SKF brand and can advise you on compatibility with other brands, without compromising equipment performance.
If you need an NUP ECNM/C bearing or want to confirm the exact designation for your equipment, send us the part number on WhatsApp. At MR Accesorios Industriales we will quote you shortly and help you choose the right option for your application.
Dimensions
Boundary dimensions of the basic designation NUP 311 per ISO 15: 55 x 120 x 29 mm (d x D x B).
- Bore
- 55mm
- Outside diameter (D)
- 120mm
- Width (B)
- 29mm
The same size in other brands
Pages from other brands with the basic designation NUP 311: 55 x 120 x 29 mm (d x D x B) per ISO 15.
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 NUP 311 ECNM/C3 bearing?
- The SKF NUP 311 ECNM/C3 bearing has a 55 mm bore, a 120 mm outside diameter and a 29 mm width (55 x 120 x 29 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation NUP 311.
- What does the C3 suffix mean on an NUP ECNM bearing?
- The C3 suffix indicates an internal radial clearance greater than standard. It is used when operating conditions involve thermal differences between shaft and housing, or when interference fits are required that reduce clearance during assembly.
- Does this bearing support axial loads in both directions?
- Yes, the NUP design with a double flange on the inner ring and one flange on the outer ring allows axial location in both directions, in addition to withstanding high radial loads. It is suitable for applications requiring precise axial positioning.
- How can I tell if a bearing from another brand is equivalent?
- You must compare the main dimensions (bore, outer diameter and width), the cage type and the internal clearance. Designations can vary between manufacturers, so it is advisable to consult a specialist before replacing a bearing.