... YGS, YGX bi-directional automatic self-aligning roller, two side roller adopts YaoGu type roll, the amount of ... each point a, a1, c, c1 and belt surface relative taxi friction movement.Because YGS, YGX bi-directional ... to sabotage, belt on one side of the surface much greater than the other side relative friction, ... -Aφ168345YGS2000-φ168 YGS/X double cone two-way automatically adjustable heart roller