TABLE OF CONTENTS "Media" refers to the abrasive or non-abrasive consumable elements (chunks) used in mass finishing processes [1]. The main function of media is to abrade or burnish the edges and surfaces of components to the desired finish. Media also helps keep workpieces from impinging on each other and serves as a carrier for any compounds used. Steel media also can compact surfaces and transfer their lustrous finish to the parts.
[1]Although "media" is the plural of "medium," it is used as a singular in mass finishing literature; we hold to this usage here.
Selection of the proper media for a specific application is critical for optimum deburring and surface finishing results. Unfortunately, the choice of media is difficult for those with no experience because of the diversified requirements of numerous applications and workpieces and the wide variety of types, sizes, and shapes of media available. In many cases, optimum selection must be made on a trial-and-error basis. This and following chapters provide detailed guides for media selection and use that are of particular benefit to the people new to the processes.
Major selection factors to consider are composition (type), size, shape (Fig. 6-1), and weight of the media to be used. Other important considerations include the capability, economy, and versatility of the media. Workpiece material, size, and geometry, burr sizes and locations, finishing requirements, finishing equipment used, and subsequent operations and functions of the workpieces are also critical factors. Some general considerations with respect...
