Engineering design and Engineering drawing are never complete without assigning tolerances. Tolerancing is an important and essential element of mass production and interchangeable manufacturing. Tolerances attempt to balance the use of a product with the cost required to produce that product. Improper tolerancing can result in parts that do not function in the way they were intended or parts produced with dimensions that are more precise than necessary, adding unwanted cost to production.
During the entire Design thro Manufacturing process, proper use of fits & tolerances is very crucial in order to bring out quality end products at optimum cost. Hence sound knowledge in Limits, Fits & Tolerances is essential for engineers involved in design, engineering, production, assembly and quality functions of Engineering Industries