The processing of non-standard precision parts is a free control and processing of other parts by enterprises due to the lack of relevant national standard specifications and parameter regulations. There are many varieties of non-standard products, and there is currently no standardized classification. The general classification is as follows.

Metal non-standard components: Customers provide drawings, and manufacturers use equipment to produce corresponding products based on the drawings. Usually, there are many molds, tolerance requirements, and glossiness that are specified by customers, and there is no certain style. The product requires corresponding quality control from casting to completion, with complex and variable processes, and generally higher costs than standard products.

Non metallic non-standard components: Processing of some non-metallic materials. In recent years, the development of injection molding industries such as plastics, wood, and stone, as well as plastic molds, has become increasingly sophisticated. The use of surface design and programming digital control has greatly increased the cost and tolerance levels of non-standard precision component processing.