In order to complete the processing of the lower part with the conical and cylindrical holes, we have designed several tapered sleeve combined mandrels. When the milling cone is positioned in the eight slots of the workpiece (Fig. 1), the guide post 1 (Fig. 2) is provided with a slidable taper sleeve 5 (? fit) and the action of the compression spring 3 to cause the workpiece to be in the compression process. Can automatically find right. The role of the pressure ring 4 is to compress the bomb
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