A winding device has an axially-adjustable spindle assembly for winding a variety of elongated flexible materials into windings or spiral coils, including without limitation flat-web, garden hose, strand, twined, braided or woven rope or the like, electric cord or even strings of holiday lights and so on. The winding device comprises a pair of side frames, one which is driven in revolutions and the other which is generally stationary. The side frames have inboard surfaces facing each other and outboard surfaces facing away. One side frame has a hollow tubular sleeve extending away from about the center of its inboard surface while the other side frame has a cylindrical spindle stub extending away from about the center of its respective inboard surface. The spindle stub telescopes into the tubular sleeve such that the side frames can revolve/rotate relative each other, close the gap between each other, or pull apart.