Deburring media are finishing media that are used to deburr, that is removing jagged pieces of extra metal from parts. The media are abrasive in nature and when put together with parts to be finished in finishing machines, the media rubs against the parts and produces a smoothing and polishing effect. There are natural and man made deburring media. Corn cob media and walnut shell media are the common natural media while plastic and ceramic media are the man made ones. Depending on the nature of the parts being finished and the type of finishing required on them, the deburring media is chosen.
Corn cob media is made by powdering the woody and hard corn cob into grit. It is organic and environment friendly. It is used for cleaning by degreasing and de-scaling and also for deburring and polishing. It is durable, reusable and cost effective. It is available from extra coarse to extra fine grit size. Plastic deburring media are made of hard plastic and are light weight. They come in different shapes like cones, wedges, tristars and pyramids to suit various component builds. A cone for instance works well with parts having holes. For parts having complex design, different shapes can be used together to achieve a good deburring effect. Plastic deburring media work well on soft metals like brass. They are very safe for use with fragile components. Ceramic media is also an effective deburring media; it is heavier compared to plastic and is used to satisfy aggressive and fast deburring needs. They too come in different shapes, sizes and composition. They come in very small sizes and are ideal to use when small media is needed.
Walnut shell media is a natural finishing media. It is used for cleaning and deburring. It is made by grinding the fibrous and hard walnut shells to different grit sizes. The grit size is based on the nature of parts being finished and how heavy they are. Walnut shell media polishes metals like brass and bronze to a nice finish. Crushed walnut shell media can add anti skid properties to paints and are used in abrasive paints around swimming pools and walkways. They find use in oil well drilling to keep the circulation going.
Walnut shell media has several advantages - the first one being that it is organic and poses no threat to health or the environment. It is reusable repeatedly and long lasting; it reduces finishing times and is found to be cost effective. It can be used in tumbling as well as vibrating finishing machines effectively. It has good absorbing properties and absorbs grime and grease; hence, it is a good cleaning media in the finishing process. It has a soft abrasive nature and can even aid in removing the top paint layer of a part while leaving the primer coat intact. They help to preserve part surfaces when the finishing process is going on. This media can be had as a coarse grit or a fine grit depending on the finishing requirements.
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