Tolerance is necessary for the production process. From the beginning of the artwork to the completion of the product, each production step will have the tolerance requirements it needs. No matter it is in making molds, product forming, coloring or printing, electroplating, fitting position… etc.
Tolerance is to formulate a range of allowable variation, within this range of variation, the product characteristics will not be affected, and the quality of the product will not be reduced. The measurement difference within this specified range is called tolerance. For any processing, there must be a processing difference. The smaller the difference is, the higher the accuracy it has. The better the quality, the higher the cost.
Therefore, under the premise of meeting the requirements of use, choosing a reasonable machining accuracy requires specifying tolerances. Tolerance is the allowable difference of production.