Vorrichtung zum Bohren von Gewinden in Werkstuecke kleiner Abmessungen

摘要

A multiple-spindle arrangement for tapping holes in small workpieces and comprising: a spindle feed mechanism, a mechanism for reversing spindle rotation, a rotary head with working spindles slidably seated therein, and a holder disk secured to said head and provided on its periphery with sockets coaxial with the spindles for receiving therein the workpieces to be tapped.