General-purpose fixtures are generally equipped with common fixtures on common machine tools, such as chucks on lathes, rotary tables on milling machines, indexing heads, and top seats. They are standardized one by one and have a certain versatility. They can be used to mount various workpieces within a certain size range without special adjustments.
However, in actual production, general-purpose fixtures often fail to meet the needs of various parts processing. Or because the productivity is low, the general fixture must be properly improved; or because of the shape of the workpiece, the processing requirements, etc., a special fixture must be specially designed to solve the actual production needs.