Needle roller bearing NSK RNA4972

NSK RNA4972 is a needle roller bearing reference, within Bearings. Request a quote for RNA4972 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The NSK RNA series needle roller bearing is a radial bearing without an inner ring, designed to support high loads in very small radial spaces. It is mounted directly on a hardened and ground shaft, which simplifies the assembly and reduces weight. It is a common solution in transmissions, pumps, compressors and continuous-production machinery, where robustness and dimensional precision are critical to avoid unplanned downtime.

The RNA series designation is read step by step: the letters RNA indicate that it is a needle roller bearing without an inner ring; the number that follows, as in RNA49/14 or RNA49/22, identifies the needle circle diameter and the width. In the RNA49 series, for example, the numeric suffixes mark different combinations of outer diameter and width. Knowing the full part number allows you to select the correct load capacity and fit for each application.

These bearings are used in industries such as food, metallurgy, plastics and mining, in equipment such as conveyor belts, mixers, positive displacement pumps and machine tools. In Argentina, MR Accesorios Industriales sells them for equipment maintenance and manufacturing, with the advantage of a low radial profile that makes compact design and cost reduction in the assembly easier.

To select the right bearing, take into account the hardness and roughness of the shaft, which acts as the raceway, and the type of sealing required for the environment. Lubrication must be suitable for the operating speed and temperature, and alignment between shaft and housing is essential to avoid parasitic axial loads. Mounting with a controlled interference fit extends the service life of the bearing.

If you need to replace a bearing from another brand, we can help you find the equivalent from the part number or the main dimensions. Interchangeability between manufacturers is based on standardized dimensions and load capacity; that is why it is important to verify the needle circle diameter, the width and the cage type before defining the replacement.

To request a quote for the NSK needle roller bearing you need, send us the full part number or the shaft and housing dimensions via WhatsApp. At MR Accesorios Industriales we will reply shortly with the exact reference and the alternative that best fits your equipment.

This description provides guidance on the product type. Check the configuration and dimensions of this reference.