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Single row cylindrical roller bearing, NU design · SKF NU 234 ECM
SKF NU 234 ECM cylindrical roller bearing

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SKF NU 234 ECM cylindrical roller bearing

Manufacturer Part NumberNU 234 ECMDimensions: 170 x 310 x 52 mm (d x D x B)Other bearings 170 x 310 x 52 mm →Also searched as: NU234ECM · NU234 ECMSKF NU 2 series: dimension table →
Brand
SKF
Category
Bearings
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How to read SKF NU 234 ECM

NU 2Series
Cylindrical roller bearings, NU 2 series. For the same bore, each series has a different outside diameter and width.
34Bore
170 mm bore: 34 × 5.
ECMSuffix
SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).

NU 234 is the standard (ISO) basic designation: it defines the type, the series and the bore.

Description

The SKF NU 234 ECM bearing has a 170 mm bore, a 310 mm outside diameter and a 52 mm width (170 x 310 x 52 mm).

SKF NU 234 ECM is a reference of cylindrical roller bearing, within Bearings. Request a quote for NU 234 ECM via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

SKF NU..ECM series cylindrical roller bearings are components designed to withstand high radial loads and considerable speeds. Their design with cylindrical rollers and machined brass cage allows robust operation in demanding industrial applications. They are ideal for equipment requiring high load capacity and rigidity, such as machine tools, gearboxes and pumps. At MR Accesorios Industriales we sell them as part of our SKF bearing line, a brand we sell.

The NU … ECM designation is interpreted as follows: the prefix NU indicates that the outer ring has two ribs and the inner ring none, which allows relative axial displacement. The central number identifies the size and dimension series. The suffix ECM indicates an optimized design with a one-piece machined brass cage, centered window and larger diameter and length rollers. This translates into greater load capacity and better guidance. Examples such as NU 207 ECM or NU 215 ECM show the variety of sizes available in this series.

These bearings are used in a wide range of industrial applications in Argentina. They are common in gearboxes, large electric motors, centrifugal pumps, compressors, textile machines and mining equipment. Their ability to withstand heavy radial loads and their rigidity make them suitable for gear transmissions and spindles. They are also used in rolling mill rolls and agricultural machinery. The NU..ECM series is common in the metalworking sector and in continuous process plants.

To correctly select an NU..ECM bearing, take into account the radial load, rotation speed and environmental conditions. It is essential to verify the alignment between shaft and housing, since these bearings do not compensate for angular misalignment. Mounting must be done with suitable tools, avoiding direct blows on the rollers. Lubrication can be grease or oil, depending on the application; at high speeds oil is recommended. Sealing will depend on external contamination: in dirty environments, opt for additional seals. Internal clearance must be chosen according to the fit and working temperature.

Regarding equivalences and interchangeability, SKF NU..ECM series bearings can be replaced by products from other brands that follow the same dimensional and suffix designation. It is important to verify that the bearing design (NU, NJ, NUP, etc.) matches the axial displacement requirements. The ECM suffixes indicate a machined brass cage, which may vary between manufacturers. Always check tolerances and internal clearance before replacing a bearing, to ensure equivalent operation.

If you need an SKF NU..ECM cylindrical roller bearing, at MR Accesorios Industriales we advise you so you choose the correct part number. Send us the complete part number by WhatsApp and we will quote you promptly. We work with the main brands to provide you with reliable solutions.

Dimensions

Boundary dimensions of the basic designation NU 234 per ISO 15: 170 x 310 x 52 mm (d x D x B).

Bore
170mm
Outside diameter (D)
310mm
Width (B)
52mm

The same size in other brands

Pages from other brands with the basic designation NU 234: 170 x 310 x 52 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 NU 234 ECM bearing?
The SKF NU 234 ECM bearing has a 170 mm bore, a 310 mm outside diameter and a 52 mm width (170 x 310 x 52 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation NU 234.
What does the ECM suffix mean in an SKF bearing?
The ECM suffix indicates that the bearing has a one-piece machined brass cage, with centered window, and larger diameter and length rollers. This improves the load capacity and rigidity of the bearing.
Does this bearing support axial loads?
The NU design has two ribs on the outer ring and none on the inner ring, so it does not support axial loads. It only allows relative axial displacement. For axial loads, other designs such as NJ or NUP are required.
How is an NU..ECM bearing mounted?
It is recommended to mount it with a hydraulic press or induction heating, avoiding blows. Verify alignment and internal clearance. Lubrication must be suitable according to the speed and working temperature.
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