Three dimensional (3D) printers; Machines for manufacturing micro and non-scale structures by solidifying a fluid compound to conform to a shape of a mold; Machines for processing plastics; Spindles being parts of machines; Alternating current servo motors; Heat exchangers being parts of machines; Gears and enclosed drives for industrial machinery; Bellows being parts of machines; Printheads for 3D printers; 3D printing pens; Electric screwdrivers