Abstract:The nylon sliders for cranes was modified with liquid lubricant,bearing grease,lithium base grease of MoS2 and special grease in order to reduce their friction and wear properties.The morphology of the modified composites was observed by SEM,the mechanical properties were tested by electronic universal testing machine,and the friction and wear properties were investigated on a wear tester.The results show that,of the 4 kinds of composites studied,the MC nylon filled with bearing grease has the best comprehensive mechanical properties and a excellent tribological property,which can meet the requirements of machinery.