the work-piece of diameter between 9 to 11 mm is acceptable, this +/- 1 mm is called tolerance.Īccording to ISO, tolerance is the difference between upper and lower limits. In measurement, we inspect the work-piece by the reference of Specification given in the Design of the product.Īs we know it is impossible to manufacture the exact dimension of the product every time, so we try to manufacture a product within tolerance.įor example, XYZ company manufacturing a rod of diameter 10 +/- 1 mm i.e. The work-piece is a real form of the product, we have to measure it. This specification used to design the product called the work-piece. ![]() ![]() In design, there is an ideal form of the product with the specification. In Engineering, Dimension measurement deals in Design, Manufacturing, and Inspection. ![]() The use of dimensional and geometrical tolerance in combination is known as Geometric Dimension and tolerancing.
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