In the conical outer surface (24) of a cap sleeve (14) of a die chuck (10) there are two diametrically opposed recesses (26) in each of which there is a slide guide (28) for a slide (30) bearing a blanking die (52). The slides can be fitted with differently shaped blanking dies (52) and adjusted at different axial distances in order to allow auxiliary machining like chamfering, axial grooving, etc. to be performed at the same time as machining with the central tool of the die chuck (10).
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