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Single row cylindrical roller bearing, steel · SKF NJ 315 ECM/C3
SKF NJ 315 ECM/C3 cylindrical roller bearing

SKFBrand we market

SKF NJ 315 ECM/C3 cylindrical roller bearing

Manufacturer Part NumberNJ 315 ECM/C3Dimensions: 75 x 160 x 37 mm (d x D x B)Other bearings 75 x 160 x 37 mm →Also searched as: NJ315ECM/C3 · NJ315 ECM/C3SKF NJ 3 series: dimension table →
Brand
SKF
Category
Bearings
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Since 1945 · Martínez, Buenos Aires, Argentina

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How to read SKF NJ 315 ECM/C3

NJ 3Series
Cylindrical roller bearings, NJ 3 series. For the same bore, each series has a different outside diameter and width.
15Bore
75 mm bore: 15 × 5.
ECM/C3Suffix
SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).

NJ 315 is the standard (ISO) basic designation: it defines the type, the series and the bore.

Description

The SKF NJ 315 ECM/C3 bearing has a 75 mm bore, a 160 mm outside diameter and a 37 mm width (75 x 160 x 37 mm).

SKF NJ 315 ECM/C3 is a reference of cylindrical roller bearing, within Bearings. Request a quote for NJ 315 ECM/C3 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

SKF NJ series cylindrical roller bearings with ECM cage and C3 radial clearance are components designed to support high radial loads and considerable speeds. Their cylindrical roller design and ground raceway allow precise operation and high load capacity. They are used in industrial applications requiring rigidity and durability, such as machine tools, gearboxes and transmission equipment. MR Accesorios Industriales sells this line as part of its broad range of SKF bearings.

The designation NJ … ECM/C… is interpreted as follows: NJ indicates that the bearing is a cylindrical roller bearing with one rib on the inner ring and two ribs on the outer ring, which allows supporting axial loads in one direction. The number that follows corresponds to the size and dimensional series. ECM refers to the one-piece machined brass cage design, roller-guided, which allows higher speeds and strength. C3 indicates an internal radial clearance greater than normal, suitable for applications with interference fits or elevated temperatures. For example, NJ 214 ECM/C3 combines these characteristics for a 70 mm bore diameter.

These bearings are used in a wide variety of industrial applications in Argentina. They are common in gearboxes, large electric motors, pumps, compressors, textile machines, mining and cement equipment. They are also used in machine tool spindles and in rolling mill rolls. Their ability to support heavy radial loads and their rigidity make them suitable for gear transmissions and demanding systems. Industries such as food, petrochemical and steel rely on these bearings to keep their equipment running continuously.

To correctly select an NJ ECM/C3 bearing, it is essential to consider the radial and axial load it will support, as well as the rotation speed and environmental conditions. The C3 clearance is recommended when the fit on the shaft or in the housing is interference, since it compensates for the reduction in internal clearance. Proper lubrication, whether grease or oil, extends service life; at high speeds oil is preferred. During assembly, ensure precise alignment between shaft and housing to avoid parasitic loads. The ECM brass cage offers robust guidance, but requires careful handling to avoid damaging it.

As for equivalents and interchangeability, SKF NJ series bearings with ECM cage and C3 clearance can be replaced by products from other manufacturers that follow the same standardized designation. Brands such as FAG, NSK, NTN or Timken offer bearings with similar characteristics, but it is important to verify that the cage design and radial clearance match those required. The NJ designation is common in the industry, although suffixes may vary. Always consult the alternative manufacturer's technical specifications to ensure dimensional and functional compatibility.

If you need to replace an SKF NJ ECM/C3 bearing or look for an equivalent alternative, at MR Accesorios Industriales we advise you. Send us the complete part number on WhatsApp and we will quote you shortly. We have a technical team ready to help you choose the right bearing for your application.

Dimensions

Boundary dimensions of the basic designation NJ 315 per ISO 15: 75 x 160 x 37 mm (d x D x B).

Bore
75mm
Outside diameter (D)
160mm
Width (B)
37mm

The same size in other brands

Pages from other brands with the basic designation NJ 315: 75 x 160 x 37 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 NJ 315 ECM/C3 bearing?
The SKF NJ 315 ECM/C3 bearing has a 75 mm bore, a 160 mm outside diameter and a 37 mm width (75 x 160 x 37 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation NJ 315.
What does the C3 suffix mean in an SKF NJ bearing?
The C3 suffix indicates an internal radial clearance greater than normal. It is specified when the bearing will operate with interference fits or at elevated temperatures, since these conditions reduce internal clearance and C3 compensates for it.
What is the difference between the ECM cage and other cages?
The ECM cage is a one-piece machined brass cage, roller-guided. It offers greater strength and allows higher speeds than stamped steel cages. It is ideal for demanding applications.
Can I replace an SKF NJ bearing with one from another brand?
Yes, as long as the designation and characteristics match. Brands such as FAG, NSK or NTN have equivalents. Verify that the cage suffix and radial clearance are the same to ensure similar performance.
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