Inner ring

The inner ring is a hardened and ground raceway mounted on the shaft so needle roller bearings can run directly on it. It is selected when the shaft does not have the hardness or surface finish required for a raceway, or when radial space is limited and high load capacity is needed. Selection is defined by shaft dimensions, bearing width, and lubrication and temperature conditions.

The series you will find in this catalog are IR and LR. The IR series corresponds to precision inner rings with controlled tolerances, designed for shafts that require a reliable raceway. The LR series is an inner ring variant with specific dimensional characteristics for certain mounting arrangements. Designation examples such as IR 22X28X20.5 or LR 15X18X12.5 indicate bore diameter, outside diameter and width; this nomenclature lets you identify the part unambiguously.

These rings are used in applications where radial space is limited and high load capacity is required: transmissions, pumps, compressors, machine tools, lifting and transport equipment, and generally any assembly with needle roller bearings on shafts that are not hardened or ground. They are also used to recover worn shafts or to provide a uniform raceway in repairs.

To request a quote for an inner ring you need the complete code (for example, IR 22X28X20.5), the main dimensions (bore diameter, outside diameter and width), and, if you do not have the reference, the equivalent bearing or equipment part number. With this information we send you the quote via WhatsApp or email.

At MR Accesorios Industriales SRL we work with SKF inner rings. We have 106 references listed in this subcategory. If you need assistance to choose the right ring, contact us with your application data and we will help you define it.