NSK FG505801 needle roller thrust bearing

NSK FG505801 belongs to needle roller thrust 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 FG505801 and any equivalents.

When axial loads are heavy but radial room is minimal, the NSK FG series needle thrust bearing is a practical solution. Its needle rollers handle thrust in a slim profile, making it suitable for compact assemblies that still require rigidity. You will find these bearings in machine tools, gearboxes, pumps and transmission equipment. MR Industrial Accessories supplies this series and can help you match the right designation to your application.

Reading an FG code is straightforward once you know the pattern. The letters FG come first, then a six-digit number that encodes dimensions and internal features. Examples include FG501903, FG502602 and FG503002, each with its own size and capacity. Suffixes, when present, point to design variations such as cage or sealing changes. For a full breakdown of dimensions and capacities per reference, the NSK Needle Roller Bearings E1419 catalog is the source to check.

In US plants, these bearings appear in machine tool spindles, rotary tables, clutches, high-pressure pumps and gearboxes. Mining, steel and cement operations also rely on them where axial forces are high and radial space is tight. Because they take thrust in one direction, they suit assemblies that demand precision and stiffness.

Selection starts with axial load, speed and the operating environment. Lubrication matters: the needles need an oil or grease film to avoid early wear. Raceway alignment is equally critical—misalignment shortens service life. If the assembly permits, sealed versions are a good choice for dirty conditions. For high-speed running, consider a polyamide or brass cage as appropriate.

Needle thrust bearings from other makers that use the same dimensional nomenclature can often interchange with NSK FG series. However, load ratings and speed limits may differ between brands. When replacing an existing bearing, compare the key dimensions—shaft diameter, outer diameter and height—along with the operating conditions. MR Industrial Accessories can help you identify a suitable equivalent.