... body with caliber for 800mm.After grinding, the roughness of the surface of the workpiece can reach 0.2μm, and the ... is adjustable, the speed of the grinding head is adjustable, the throw of eccentric of the grind head is adjustable, the grinding head is flexible. This ... economic profits extremely. ln addition, the multi-headed valve grinder of model YFJ -W-II can be designed and manufactured according ...