In machining processes, great amount of the cutting energy transforms to heat energy. Tool life decreases and the quality of the machined surface changes by the effects of heat during machining. Many researches are being done on the reduction of the negative effects of the heat on the tool. In this respect, cutting fluids are used, but usages of them are limited because of their some harmfully effects to the environment. In order to reduce the tool wear and to use the tool longer, during cutting continuously variation of the contact region of the tool and the chip can been realized by using self-propelled rotary tools. The tool life is longer in rotary tools when compared with stationary cutting tools. In machining with these tools lower heat effect at the cutting edge is observed.