INA NKIS50-XL needle roller bearing

INA NKIS50-XL 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 NKIS50-XL and any equivalents.

When a machine leaves little room around the shaft but still has to carry radial load, the INA NKIS-XL needle roller bearing is one of the options our customers ask about most. It combines machined inner and outer rings with a needle cage, so it fits into a small cross section while staying rigid. Our team in Miami supplies this line to maintenance and purchasing departments throughout the United States and Latin America, and can help you match a part number to your application.

Reading the designation is the fastest way to narrow down a replacement. The letters NKIS tell you this is a needle roller bearing with both rings present, built in a compact, high-capacity format. The digits after the letters give the bore in millimeters, and the -XL suffix marks the manufacturer's current generation, which differs from earlier versions in design and load capacity. Once you know those three elements, you can identify series and size at a glance.

Typical installations include machine tools, pumps, compressors, gearboxes, power transmission equipment, conveyors, agricultural machinery and textile equipment. Where a larger ball or roller bearing simply will not fit, the compact section and radial load capacity of this design often make it the practical choice. It also suits oscillating motion and moderate-speed rotation where rigidity and precision matter.

Selection comes down to four things: the radial load the bearing will see, the rotation speed, whether lubrication is grease or oil, and the environment around the mounting. Alignment between shaft and housing has to be right, otherwise the bearing picks up extra load. Confirm the shaft tolerance for the inner ring and the housing fit for the outer ring, use the lubricant the manufacturer calls for, and renew it on your maintenance schedule.

Other manufacturers offer bearings with similar designations, but dimensions and capacities do not always line up. Before swapping one brand for another, check bore, outer diameter and width against the load conditions of the application. We supply the INA brand and can walk you through compatibility with other references.

To request a quote, send the exact part number by WhatsApp or email, for example NKIS25-XL or NKIS40-XL. Our team replies promptly and can suggest equivalents or help you choose the right bearing for the job.