Basically, to run a coated abrasive belt requires a power source, a tracking and tensioning device, and a method or unit to transfer the power into driving the belt. A unit, therefore, consists of (Fig.1) the following: (A) a power source, (B) a drive wheel or contact wheel, (C) an idler for tensioning and tracking the belt, and (D) the proper coated abrasive belt. In the vast majority of off-hand belt applications (in this context, "off-hand" does not Imply "careless"; rather, it means with a hand-held workpiect), the amount of power Consumed is directly related to the operation being performed on the workpiece and/or the Operator's ability to apply pressure to the work.
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