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)
Good to know
Solid mandrels usually vary from 4 to 12 inch in length and are accurately ground with a 1:2000 taper; the mandrel should be mounted between centers so that the cutting force tends to tighten the work on the mandrel taper.
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