SKF RNU 305 cylindrical roller bearing

SKF RNU 305 belongs to cylindrical 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 RNU 305 and any equivalents.

SKF RNU bearings are cylindrical roller bearings that come without an inner ring. The shaft itself serves as the raceway, so the assembly takes up less radial space. These bearings handle high radial loads and high speeds. SKF builds them to tight tolerances and fits a steel cage. They suit power transmission, pumps, compressors and other industrial machines. MR Industrial Accessories supplies them and helps you pick the right one and install it correctly.

The RNU prefix tells you this is a cylindrical roller bearing with no inner ring. The digits that follow give the size. The first digit after RNU stands for the diameter series, and the last two digits give the shaft diameter in millimeters, following the standard code. So the number on the bearing quickly tells you the shaft size and the load capacity you can expect.

You will find RNU bearings in gearboxes, centrifugal pumps, compressors, industrial fans and machine tools—anywhere you need high radial capacity and stiffness. They work well when the shaft is already hardened and ground, because the shaft acts as the inner raceway. That design also lets you build a more compact assembly. In the US and Latin America, they show up in food processing, petrochemical, cement and mining equipment.

When you select an RNU, start with the shaft diameter and its hardness. The shaft must be ground to the right roughness. Then check the internal clearance and the cage type for your speed and load. You can lubricate with grease or oil. Keep the shaft and housing aligned to avoid extra stresses, and seal the assembly to keep contaminants out and lubricant in.

SKF RNU bearings interchange with other brands that use the same dimensional designation, such as FAG, NSK or NTN, as long as tolerances and clearance match. When you replace one, look beyond the part number: compare the cage, heat treatment and precision class. MR Industrial Accessories supplies SKF and can point you to the right equivalent for your equipment.

If you need an RNU bearing, send the complete part number by WhatsApp or email. At MR Industrial Accessories we help you identify the correct part and answer questions about mounting or interchangeability. We reply promptly.