NTN NK45/30RCT needle roller bearing

NTN NK45/30RCT belongs to needle roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for NK45/30RCT and any equivalents.

For applications where radial space is tight but loads are high, the NTN NK series needle roller bearing delivers. This single-row bearing features a machined outer ring and no inner ring, allowing direct mounting on a hardened and ground shaft. The result is a compact assembly with reduced weight and excellent radial load capacity, suitable for machine tools, transmission equipment, and automotive components.

Reading the NK series designation is straightforward. The prefix NK identifies a needle roller bearing with a machined outer ring and no inner ring. The first number gives the bore diameter in millimeters, and the number after the slash is the overall width. The suffix RCT indicates a double-lip contact seal that retains grease and blocks contaminants. For example, NK20/16RCT has a 20 mm bore and 16 mm width, while NK35/20RCT offers a 35 mm bore and 20 mm width.

These bearings serve a wide range of industries. In automotive, they appear in gearboxes and pumps; in machine tools, in spindles and guides; in power transmission, in pulleys and gears; and in material handling equipment. Their low profile allows them to fit where other bearings cannot, yet they still handle high radial loads. This makes them a reliable choice for production line maintenance, pumping systems, compressors, and agricultural machinery.

Selecting the right NK bearing involves assessing radial load, speed, and operating environment. The RCT seal suits areas with moderate dust or humidity, as its contact lip prevents particle ingress. The shaft must have appropriate surface hardness and roughness to serve as the inner raceway, and proper housing alignment is essential to avoid unintended axial loads. High-quality grease is recommended; for high-speed assemblies, check internal clearance and cage type.

NTN NK series bearings follow standard dimensional nomenclature, so they can replace equivalent bearings from other manufacturers as long as bore, outer diameter, and width match. Sealing suffixes may differ between brands (e.g., RS, 2RS), but dimensions remain compatible. If you have a code from another brand, send it to MR and we will identify the exact equivalent.

Need an NK needle roller bearing for your equipment? Send the part number or measurements via WhatsApp or email to MR Industrial Accessories LLC. Our team will respond promptly with a quote and can advise on seal selection and lubrication for your specific application.