Friction, wear and surface damage mechanisms of pneumatic clutch actuators

The wear occurring at the tests with only silicone grease is similar, but on a lower scale, to the wear at the tests with a mixture of silicone grease and standard dust. The polishing of the anodised aluminium is increased with increasing temperature or increasing load. The wear of the anodised aluminium surface is more prominent when sliding against the PTFE guiding ring than when sliding against the lip seal. The wear of the guiding ring increases with increasing load or increasing temperature. The lip seal is worn but at 140 °C (with silicone grease or with a mixture of silicone grease and standard dust) or at increased load (with a mixture of silicone grease and standard dust) a thick layer of adhered material is formed.