What is polishing process

Polishing is a surface finishing process performed by a polishing wheel for the purpose of removing appreciable metal to take out scratches, tool marks, pits and other defects from rough surface. The process of polishing with abrasives starts with coarse once and graduates to fine once. 

Polishing is the method of rubbing or using a chemical action to create a soft and shiny surface.

Purpose of polishing : 

The primary purpose of polishing is to change the texture of the surface instead of the form. Polishing can produce highly reflective mirror surfaces. It removes the material at a very low rate.

Benefits of polishing : 
  • Strength of polished products is normally higher than their rougher counterpart owing to the removal of stress concentration present in the rough surface. 
  • Polishing with very fine abrasive differs physically from coarser abrasion, in that material is removed on a molecular level so that the rate is correlated point rather than to the melting point of the material being polished. 
  • In polishing usually accuracy of size and shape of the finished surface is not important, but sometimes tolerance of 0.025 mm or less can be obtained in machining polishing.