Between 1760 and 1860 Many machine tools enterprises appeared. Many great engineers devoted their lives to perfecting the machine tools required for generating many shapes in metallic components Cylindrical and flat surfaces *Threads *Grooves Slots and holes Between 1760 and 1860 Many machine tools enterprises appeared. Many great engineers devoted their lives to perfecting the machine tools required for generating many shapes in metallic components.  Cylindrical and flat surfaces  Threads  Grooves  Slots and holes