A spindle can get used to supply/contain energy by being belted with streched belt. The contained energy can get given off in momental phasises. The contained energy can get used for the spindlemovements to roll off the stretched belt, to roll the not stretched belt after having given off the energy onto another spindle and for usage of the restenergy for transmission to alternate mechanical energy. The energy for the transmission can get usable by two rollleadings close to the energycontaining spindle by using a controlled driven rollleading and one a bit less close generatordriving rollleading. A spindlesystem in cassette-shape is imaginable and distribution by lendingfee for transmissions is imaginable.