Inner ring NSK FIR-121612

NSK FIR-121612 is a inner ring reference, within Bearings. Request a quote for FIR-121612 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The NSK inner ring of the FIR series is a precision component that is mounted on the shaft to act as a raceway in needle roller bearings. It is used when the shaft is not hardened or ground and a hard surface with the appropriate roughness is needed for correct bearing operation. MR Accesorios Industriales sells this series in Buenos Aires, Argentina, and advises you on choosing the code that corresponds to your application.

The FIR series designation is interpreted from the fixed prefix FIR followed by a hyphen and a combination of numbers that identifies dimensions and variants. For example, FIR-5812-1, FIR-5816-1, FIR-10158-2, FIR-071010, FIR-071012, FIR-71012-1, FIR-071015 and FIR-71016-1 show different formats within the same family. The numeric suffixes may indicate the bore diameter, the width or machining features, but each code corresponds to a specific size that should be confirmed with the drawing or the original part.

These inner rings are used in a wide variety of industrial equipment in Argentina: machine tools, pumps, compressors, gearboxes, conveyors, agricultural and textile machinery, among others. Their function is to provide a hard, ground raceway when the shaft does not have the necessary hardness or surface finish. This extends the service life of the needle roller bearing and prevents premature shaft wear.

To select the right inner ring, take into account the shaft diameter, the bearing width and the type of load. It is essential to verify the tolerance and fit, since the ring must be mounted with an interference that guarantees its fixation without deforming it. Lubrication and alignment also influence performance: a misaligned mounting can generate unexpected axial loads. If the shaft shows wear, the inner ring is a solution to restore the raceway surface.

As for equivalents, inner rings of the FIR series can be found in other brands under similar nomenclatures, but there is no universal correspondence. Each manufacturer defines its own codes and dimensions. Therefore, if you need to replace a ring from another brand, the safest option is to send us the original code or the shaft and bearing dimensions so we can identify the correct part. At MR Accesorios Industriales we quote the exact code or size you need.

If you already have the code for your NSK FIR series inner ring, write to us on WhatsApp and we will quote it promptly. If you don't have it at hand, send us the dimensions or a photo of the part and we will help you identify it. With more than 80 years in the business, at MR Accesorios Industriales we are here to advise you on the selection and mounting of rolling components.

This description provides guidance on the product type. Check the configuration and dimensions of this reference.