Jaw crushers south africa, 2020-5-6 · Jaw crushers process medium to hard quarry rock or other materials by compressing it between the fixed jaw and the swing jaw. The swing jaw being the moving part is attached to a rotating eccentric shaft. The fixed jaw is an integral part of the crusher frame. Both jaws are fitted with manganese jaw liners that can be replaced or reversed when ...Crushing 101 » Masaba Manufacturing, 2019-10-4 · Crusher efficiency test 1) Fill box level with discharge material from crusher. 2) Dump contents onto like-sized screen cloth as the crusher discharges to. 3) Work material around by hand and place the oversize back into the box. If the box is 1/3 full, for example, the crusher is operating at 65 percent efficiency..