In the previously reported Part I and Part II, the experimental results in the frictional machining under liquid atmospheres to obtain the best surface roughness were showed. In the present study the frictional machining was carried out in gas atmospheres such as air, oxygen, dioxide carbon and argon, and in solid lubricant atmosphere of graphite powder. The results were compared with those of Part I and Part II. The material to be tested and machining conditions were made identical with Part I and Part II. The best surface roughness obtained in the above gas and solid lubricant atmospheres was worse than the liquid atmospheres but the contact pressure to minimize the surface roughness was considerably low. The best surface roughness in the present study was obtained in the atmospheres of dioxide carbon and graphite powder and the worst one was in oxygen and argon gas.