Deep groove ball bearing NSK 681 X

NSK 681 X is a deep groove ball bearing reference, within Bearings. Request a quote for 681 X via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The deep groove ball bearing is a rotating component with radial and axial contact, made up of two rings, a cage and a row of balls. It is used in electric motors, pumps, fans, machine tools and transmissions. The NSK X series covers thin-section metric sizes, with suffixes that define sealing, cage and clearance. At MR Accesorios Industriales we advise you on choosing the exact code for your application.

The X series designation is made up of a three- or four-digit base number and a suffix that starts with X. For example, 601 X, 602 X, 681 X, 682 X, 691 X and 692 X combine the dimensional code with the letter X, which in practice identifies execution variants within the family. The base number defines the bore diameter, outer diameter and width; the X suffix can indicate a specific version of cage, sealing or tolerance. To correctly interpret each code, it is best to consult the size table and the meaning of the suffixes.

These bearings are used in a wide variety of industrial equipment in Argentina: low and medium power electric motors, centrifugal pumps, fans, compressors, machine tools, conveyor belts and transmission equipment. They also appear in applications requiring low noise and high speed, such as household appliances, power tools and medical equipment. Their rigid and versatile design makes them suitable for moderate radial and axial loads in both directions.

To select the right bearing, take into account the radial and axial load, the rotation speed, the type of lubrication and the environmental conditions. Sealing can be open, with metal shields (ZZ) or with rubber seals (DDU); choose according to contamination and the need to retain lubricant. Radial clearance (CN, C3, C4) is defined by the working temperature and the fit. During mounting, ensure the alignment of the supports, avoid striking the rings and use suitable tools so as not to damage the raceways.

Deep groove ball bearings are interchangeable among manufacturers if the main dimensions and the type of execution match. When replacing a part, verify the full code: the base number and the sealing, cage and clearance suffixes. Brands such as SKF, FAG, NTN or Koyo offer dimensional equivalents, but tolerances and capacities can vary. If you have doubts, send us the code of the original part and we will tell you the compatible alternative or the exact replacement.

At MR Accesorios Industriales we sell NSK bearings and those of other leading brands. If you need the X series, write to us on WhatsApp with the code or the dimensions and we will quote it promptly. We can also advise you on lubrication, mounting and maintenance practices to extend the bearing's service life. More than 80 years of experience back us as an industrial supplier in Buenos Aires, Argentina.

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