tooriku siseava läbimõõdu järgi töödeldud, väikese koonilisusega torn tooriku treipinki kinnitamiseks (vt torn; vrd ketastorn; koonustorn; tsangtorn), a cylindrical, tapered bar whose one side is larger in diameter than the other; used to support partly machined workpiece while it is being finished (see: mandrel; compare: gand mandrel; cone mandrel; collet mandrel)