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Balancing Standards

The International Standards Organisation (ISO) publishes several standards which are the global benchmark for industrial balancing. The standard specifies Balance Tolerances, the necessary number of correction planes, and methods for verifying the residual unbalance. This standard is also intended to facilitate the relationship between the manufacturer and user of rotating machines, by stating acceptance criteria for the verification of residual unbalances.

The ISO standards contain detailed methods of calculating different static and couple unbalance tolerances that are dependent on the ratio of the part's diameter to its length.The ISO also specifies a Balance Quality Grade. This is a term used to define the limits of residual unbalance.

The standard has issued guidelines with regard to a number of different kinds of devices. A balance quality grade of G6.3 is appropriate to most fans. A grade of less than G2.5 is usually only achievable on very special equipment.

• All rotating components experience significant quality and performance improvements if balanced.
• Balancing is the process of minimizing vibration, noise and bearing wear of rotating bodies.
• It is achieved by reducing the centrifugal forces by aligning the principal inertia axis with the geometric axis of rotation through the adding or removal of material.
• Virtually all rotating components experience significant quality improvements if balanced. In today’s global market consumers look for the best value for money.
• They demand maximum performance, minimum size, and lower cost. In addition everything must be smaller, more efficient, and more powerful, weigh less, run quieter and last longer.
• Balancing will therefore always be one of the most cost effective means of providing quality products to consumers.
• Balancing of rotating machinery or parts therefore reduce noise, allow higher operating speeds, increase bearing life, and more.