USB2 Vertical mill roller Google Patents
The vertical mill roller shown in each of FIGS. 1A and 1B is a trapezoidal roller 10 used in the vertical mill roller called as Loesche mill. The trapezoidal roller 10 shown in FIG. 1A is a conventional roller, and a plurality of screw grooves 11 A are formed in an entire outer circumferential surface 12 at regular intervals in the roller shaft ...