Topic
boss.
protruding feature on a workpiece, for locating one object to another, or provide an attachment point or bearing surface
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About boss
In engineering, a boss is a protruding feature on a workpiece. A common use for a boss is to locate one object within a pocket or hole of another object. For instance, some motors use a precisely machined boss on the front face to locate it on the mating part. Like a process on a bone, bosses on castings can provide attachment points or bearing surfaces.
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