as parts of a cone fig3 now shows a variant with a twin cylinder refiner here too the axial displacement of the wedge carrier 1 exerts force on the wedge carrier 1 which is displaced in radial direction as a result in this case it also sets the gap 3 between the refiner plates 5 of the stator and the refiner plates 5 u2032 of the rotor the refining gap in operations is between 0 and 2 mm for example 0 5 mm if larger impurities occur or also in the start up phase of the machine the gap can be opened to up to 16 mm fig4 shows a further variant of the setting at a twin cylinder refiner instead of a single long wedge there are two shorter wedge segments mounted on the wedge carrier 1 each of which are approximately the same length as one of the cylindrical refining surfaces 5 u2032 the wedge carrier 2 as counterpart beside these two cylindrical refining surfaces 5 u2032 has inclined planes along which the wedge carrier 1 slides it functions in the same way as in the preceding variants where displacement of the wedge carrier 1 in axial direction in turn causes displacement of the wedge carrier 2 in radial direction since this movement is distributed between two wedge segment surfaces this permits better and more even transfer of energy and thus much more exact setting of the refining gap 3 between the refiner plates 5 and.