Needle roller bearing INA NK55/25-D-XL

INA NK55/25-D-XL is a needle roller bearing reference, within Bearings. Request a quote for NK55/25-D-XL via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The INA NK-D-XL series needle roller bearing is a single-row radial bearing without an inner ring, designed to withstand high radial loads in very small radial spaces. It is mounted directly on a hardened and ground shaft, which simplifies the design and reduces weight. It is a common solution in applications where space is critical and high load capacity is required, such as machine tools, transmission equipment and industrial mechanisms in general.

The NK-D-XL series designation is read as follows: NK indicates that it is a needle roller bearing without an inner ring, with a machined outer ring and a needle cage. The number that follows, separated by a slash, indicates the needle circle diameter and the cage width; for example, in NK20/16-D-XL the 20 corresponds to the nominal bore diameter and the 16 to the total width. The D suffix indicates that the outer ring has two ribs and the XL suffix identifies the high-quality execution according to the manufacturer's internal standard. These codes allow you to select the exact size according to the available shaft and housing.

This type of bearing is used in a wide variety of industrial applications in Argentina: from machine tools and transmission equipment to pumps, compressors, fans and conveying systems. Its ability to withstand radial loads in tight spaces makes it ideal for gearboxes, camshafts and oscillating mechanisms. It is also used in the automotive, textile and food industries and in the manufacture of agricultural machinery, where robustness and precision are essential.

To correctly select an NK-D-XL bearing, take into account the shaft diameter and hardness, which must be hardened and ground with adequate roughness. Alignment between the shaft and the housing is critical to avoid unforeseen axial loads. Lubrication can be with grease or oil, depending on the speed range and working temperature. The sealing of the assembly depends on the application design; in many cases additional seals are required to protect the bearing from contaminants. Installation with an interference fit on the outer ring and adequate radial clearance ensures reliable operation.

Regarding equivalences and interchangeability, needle roller bearings without an inner ring are manufactured under international standards that allow one brand to be replaced by another as long as the main dimensions and tolerances are respected. INA is a reference brand, and there are alternatives from other manufacturers with similar designations, although the suffixes may vary. For a safe substitution, it is essential to verify the needle circle diameter, the width and the load and speed conditions. If you have any doubts, the technical team at MR Accesorios Industriales can advise you.

If you need an INA NK-D-XL series needle roller bearing, write to us on WhatsApp with the part number or the size you require. At MR Accesorios Industriales we help you identify the correct reference and answer any technical question about installation, lubrication or applications. With more than 80 years of experience in the industrial market, we are here to advise you and quote what you need promptly.

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