Cooling-air grinding is one of important green grinding. Cooling-air grinding performances for 40Cr are test in this paper using cooling-air generator. Main performance influencing factors are test and analyzed, such as air temperature, wheel granularity, amount of feed and so on. Cooling-air grinding results shows that roughness of surface of test pieces can reach precise grinding standard. So cooling-air grinding can replace traditional grinding in this experiment. This study for the promotion of cooling-air grinding application technology has important significance for reference.

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