NSK FWF-586526Z needle roller cage

NSK FWF-586526Z belongs to needle roller cage, 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 FWF-586526Z and any equivalents.

Needle cages in the NSK FWF series serve one purpose inside a bearing: they hold the needles apart and keep them aligned, which cuts friction and lets the assembly rotate smoothly, including at high speed. They suit designs where radial room is tight but the bearing still has to carry a heavy radial load.

The part number itself tells you most of what you need. The FWF letters mark the needle cage family, and the digits that follow describe the size and design. Take FWF-172221Z, FWF-364822Z, FWF-566133Z and FWF-586526Z: each numeric block points to a different cage size and configuration. A trailing Z generally signals a sealing or protection variant, so confirm the full number before ordering.

You will find these cages in needle roller bearings used in transmissions, pumps, compressors, machine tools and automation equipment, as well as in gearboxes, electric motors, textile machines and agricultural machinery. Their job is to guide the needles precisely, spread the load and simplify installation in compact, lightweight assemblies.

Choosing the right cage comes down to three measurements: the shaft diameter, the outer diameter and the width at the mounting point. Lubrication and alignment matter just as much, since either one done poorly leads to early wear. In dusty or damp conditions, look at versions with extra protection. During assembly, use tools that will not mark the needles or the cage, and stay within the manufacturer's tolerances.

Cages from other brands can often be swapped in when the main dimensions and needle type line up. Compare the full part number and the standard measurements side by side. If the part is unmarked, send a photo or the key dimensions and we will identify a compatible option.