Abstract: The present invention concerns an industrial robot according to the delta concept with an arm system (2) intended for rotation in space that comprises a base section (4), a movable plate (6), several jointed struts (8) and a telescopic shaft (10, 40) arranged between the base section and the movable plate, in which opposite ends (12, 14) of the struts and the telescopic shaft are connected to the base section and to the movable plate, respectively, and in which the telescopic shaft (10, 40) comprises a first telescopic arm (16, 46) and a second telescopic arm (18, 48) that are arranged longitudinally displaceable relative to each other, that each telescopic arm (16, 18; 46, 48) comprises at least two rods (20, 22; 50, 52) that are attached to holders (24-27; 54-57) at their respective end sections. The present invention also includes a method and an application.