Rubber industry often faces the problem of wear of rubber parts. Some forms of wear, especially the wear of tyre tread or conveyor belts, are very similar to working itself. The tyre tread is the part of tyre which secures contact of vehicle with road and is directly involved in the transfer of driving power. The wear of tyre treads of passenger car and freight vehicles moving on usual roads, is characterised by its abrasion. Tyre tread of a vehicle is exposed to abrasive effect of the road it moves on. However, the mechanism of wear of tyres working in very hard terrain conditions is absolutely different. Sharp stone edges and terrain irregularities gradually cut (tear off) parts of the rubber trea.d surface, which can be understood as a way of working. There is also some similarity to milling, although under very specific conditions. The mechanism of tyre tread wear working in hard terrain conditions is technically called Chip-Chunk effect and it can be considered as "workability" of rubber surface.
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