SKF RNU 204 cylindrical roller bearing

SKF RNU 204 is a reference of cylindrical roller bearing, within Bearings. Request a quote for RNU 204 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

RNU bearings are cylindrical roller bearings without an inner ring, designed to withstand high radial loads and high speeds. They are mounted directly on the shaft, which acts as the raceway, allowing the radial size of the assembly to be reduced. SKF manufactures them with tight tolerances and a steel cage, ideal for power transmission, pumps, compressors and industrial machinery. At MR Accesorios Industriales we sell them and advise on their correct selection and mounting.

The RNU designation identifies cylindrical roller bearings without an inner ring. The numbers that follow indicate the size, as in the sample examples. The first digit relates to the diameter series and the last two to the shaft diameter on which it is mounted, according to the code. Thus, the numeric suffix allows the bearing to be quickly located in the catalog according to the shaft size and the required load capacity.

These bearings are used in applications requiring high radial load capacity and rigidity, such as gearboxes, centrifugal pumps, compressors, industrial fans and machine tools. In Argentina, they are common in the food, petrochemical and cement industries and in mining equipment. Their design without an inner ring facilitates mounting on shafts that are already hardened and ground, and allows more compact assemblies.

To select an RNU, take into account the shaft diameter and hardness, since the shaft must act as the raceway with the appropriate roughness. Check the internal clearance and the cage type according to speed and load. Lubrication can be grease or oil, and it is essential to maintain alignment between the shaft and the housing to avoid parasitic stresses. Sealing the assembly protects against contaminants and lubricant loss.

SKF RNU bearings are interchangeable with those from other brands that follow the same dimensional designation, such as FAG, NSK or NTN, as long as the specified tolerances and clearance are respected. When replacing, compare not only the part number but also the execution (cage, heat treatment, precision). MR Accesorios Industriales sells SKF and can advise you on the right equivalent for your equipment.

If you need an RNU bearing for your machine, send us the full part number by WhatsApp. At MR Accesorios Industriales we help you identify the correct part and resolve questions about mounting or interchangeability. Write to us and we will reply shortly.