Tool for cutting the isthmuses of printed circuit boards

A tool for cutting isthmuses of printed circuit boards, wherein the isthmuses are bridges of material disposed in slots of a plate having a plurality of PCBs, the tool comprising:

• a base plate with an upper surface and a lower surface;
• a spindle having a shank affixable to a rotating machine and a cutting tip insertable into the slots of the plate having the plurality of PCBs and to cut the isthmuses;
• a spindle support fixed to said base plate and revolvingly supporting said spindle;
• a head fixed to said base plate and having a through hole in which said shank of the spindle is disposed;
• and
• a guide mounted on said head and having a through hole in which said cutting tip of the spindle is disposed;
• in such manner that a portion of the cutting tip of the spindle protrudes from the guide, said guide comprising a guide rib aligned with the cutting tip of the spindle and insertable into the slots of the plate with the plurality of PCBs in order to guide a relative movement of the plate with the PCBs with respect to the tool wherein the plate with the plurality of PCBs is freely movable from a top position to a bottom position and from the bottom position to the top position so that the guide rib of said guide enters into the slot of the plate having the plurality of PCBs and the guide rib of the guide exits from the slot of the plate having the plurality of PCBs in order to rotate the plate having the plurality of PCBs.