NSK RNAF 506520 needle roller bearing

NSK RNAF 506520 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 RNAF 506520 and any equivalents.

The NSK RNAF series is a radial needle roller bearing that comes without an inner ring. The needles run directly on a hardened and ground shaft. Because the section height is minimal, this bearing fits where a ball bearing would not, while still handling significant radial loads with good rigidity. Typical equipment includes machine tools, transmission units, pumps, compressors and lifting mechanisms.

You can decode the RNAF part number from its digits: they give bore, outer diameter and width in millimeters. Take RNAF 101710: bore 10 mm, outer diameter 17 mm, width 10 mm. RNAF 162812: bore 16 mm, outer diameter 28 mm, width 12 mm. Suffixes that sometimes follow the basic designation relate to sealing, tolerance or lubrication.

In US plants, these bearings turn up in machine tool spindles, gear reducer boxes, gear pumps, screw compressors, packaging lines and lifting mechanisms. They also suit electric motor transmissions, textile machinery and material handling equipment where radial space is tight. Maintenance teams on production lines often choose them because they carry high radial loads in a low profile.

When selecting an RNAF bearing, start with the shaft: its raceway must be hardened and ground to the right hardness and roughness. Check alignment between shaft and housing, since needles do not tolerate misalignment well. Grease or oil both work as lubricants; in dirty environments, consider extra sealing. During mounting, use the correct tools and never strike the needles directly.

Needle roller bearings are identified by designation and dimensions, and equivalents exist across brands. If you have a part number from another maker or an unidentified bearing, we can point you to a compatible alternative. Interchangeability depends on dimensions, load capacity and sealing type, so verify those details before replacing.

For an NSK RNAF series bearing, send the full part number or the dimensions via WhatsApp. MR Industrial Accessories will quote it promptly. We can also help if you need a sealed version, a higher-capacity option or special dimensions.