SKF RNA 4906.2RS needle roller bearing

SKF RNA 4906.2RS 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 RNA 4906.2RS and any equivalents.

The SKF RNA series with the RS suffix is a radial needle roller bearing that runs without an inner ring and carries contact seals on both sides. It fits applications where radial room is tight and the shaft itself, once ground, serves as the raceway. Typical uses include transmissions, pumps, machine tools and general industrial equipment. MR Industrial Accessories supplies this SKF line and helps you match the correct part number to your application.

Reading the designation helps when you are working from a drawing or a worn part. RNA tells you the bearing is a needle roller type with no inner ring, a machined outer ring and guided needles. The figure after it points to the series and size. In the 22 series, RNA 22/6.2RS and RNA 22/8.2RS take shafts of 6 mm and 8 mm respectively. The 2200 series covers RNA 2202.2RS and RNA 2204.2RS. Higher-capacity options sit in the 4900 series: RNA 4901.2RS, RNA 4902.2RS, RNA 4903.2RS and RNA 4905.2RS. The 2RS suffix means contact seals are fitted on both sides, holding lubricant in and keeping contaminants out.

You will find these bearings in food processing, cement, steel and paper plants, as well as in machine tool building. Gearboxes, pumps, compressors, fans, conveyors and packaging equipment are common homes for them. Because there is no inner ring, the outer diameter and overall weight of the assembly come down, which matters in mechanisms where radial space is at a premium. Production lines, road equipment and agricultural machinery also rely on them where radial load capacity and a rugged build are the deciding factors.

Selection comes down to the radial load the bearing will see, the rotation speed and the surrounding conditions. The 2RS suffix already gives you sealing, but where dust or liquids are present, consider whether extra protection is needed. Factory lubrication generally covers the service life; in more demanding duty, relubrication may be required. During mounting, the shaft must have the right hardness and surface finish to work as a raceway, and alignment between housing and shaft should be checked so parasitic axial loads do not appear.

When it comes to equivalents, needle roller bearings without an inner ring are defined by shaft diameter, width and load capacity. Other manufacturers such as INA, NSK or NTN make comparable products, yet the part numbers do not always line up. What determines interchangeability is dimensions and tolerances, not the number alone. Before you swap a bearing out, measure the actual part and speak with a specialist. MR Industrial Accessories can help you locate the right replacement within the SKF line we supply.