SKF NU 2256 ECMA/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 NU 2256 ECMA/C3
- NU 22Series
- Cylindrical roller bearings, NU 22 series. For the same bore, each series has a different outside diameter and width.
- 56Bore
- 280 mm bore: 56 × 5.
- ECMA/C3Suffix
- SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).
NU 2256 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The SKF NU 2256 ECMA/C3 bearing has a 280 mm bore, a 500 mm outside diameter and a 130 mm width (280 x 500 x 130 mm).
SKF NU 2256 ECMA/C3 is a reference of cylindrical roller bearing, within Bearings. Request a quote for NU 2256 ECMA/C3 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
SKF NU ECMA/C series cylindrical roller bearings are components designed to withstand high radial loads and high speeds. Their cylindrical roller design and machined brass cage allow precise operation in demanding applications. They are used in industrial machinery, gearboxes, pumps and power transmission equipment. At MR Accesorios Industriales we supply them as part of our SKF bearing line, with technical advice to choose the right configuration.
The designation of these bearings is interpreted as follows: NU indicates that the outer ring has two ribs and the inner ring none, so they only support radial loads and allow axial displacement. ECMA indicates an optimized design with a one-piece machined brass cage, roller-guided, and C3 indicates an internal radial clearance greater than standard. Examples in the series are NU 2256 ECMA/C3, NU 2348 ECMA/C3 and NU 2356 ECMA/C3, where the numbers following NU indicate the size and the dimension series.
These bearings are used in applications where radial load is predominant and high precision is required. In Argentina, they are common in speed reducers, gearboxes, centrifugal pumps, compressors, machine tools and mining and cement equipment. They are also found in large electric motors and mill drives. Their ability to withstand high radial loads makes them suitable for severe industrial environments, where reliability and durability are critical.
To select the right bearing, take into account the radial load, rotational speed and environmental conditions. The C3 suffix is recommended when thermal expansion due to temperature or mounting fits is expected. Lubrication must be chosen according to speed and working temperature; for high speeds, synthetic lubricants are preferred. Mounting requires precise alignment and cleanliness of the seat, and it is essential to check the radial clearance after installation. The machined brass cage provides strength and allows higher speeds.
Regarding equivalents, cylindrical roller bearings from other brands with similar designations may be interchangeable, but always verify dimensions and tolerances. SKF's NU ECMA/C series is distinguished by its brass cage and C3 clearance. When looking for alternatives, compare load capacity and internal design. At MR Accesorios Industriales we can advise you on interchangeability and available options.
If you need spare parts for your equipment, send us the complete part number via WhatsApp. At MR Accesorios Industriales we will provide a quote promptly and help you identify the best option for your application. We work with the leading brands to provide you with reliable solutions.
Dimensions
Boundary dimensions of the basic designation NU 2256 per ISO 15: 280 x 500 x 130 mm (d x D x B).
- Bore
- 280mm
- Outside diameter (D)
- 500mm
- Width (B)
- 130mm
The same size in other brands
Pages from other brands with the basic designation NU 2256: 280 x 500 x 130 mm (d x D x B) per ISO 15.
- FAGNU2256-E-TB-M1
- NTNNU2256
- RKBNU 2256
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 NU 2256 ECMA/C3 bearing?
- The SKF NU 2256 ECMA/C3 bearing has a 280 mm bore, a 500 mm outside diameter and a 130 mm width (280 x 500 x 130 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation NU 2256.
- What does the C3 suffix mean in these bearings?
- The C3 suffix indicates an internal radial clearance greater than standard. It is used when there is thermal expansion due to temperature differences between shaft and housing, or when specific mounting fits are required. It is important to verify operating conditions to choose the right clearance.
- Where are NU ECMA/C3 bearings used?
- They are used in applications with high radial loads and high speeds, such as gearboxes, pumps, compressors, machine tools and mining equipment. Their design allows good performance in demanding industrial environments, provided correct mounting and lubrication are carried out.
- How do I request a quote for these bearings?
- You can send us the complete bearing part number via WhatsApp. At MR Accesorios Industriales we will reply with the quote. If you are not sure of the part number, we can help you identify it based on dimensions or application.