Abstract
In recent years the drawing is designed by CAD, and the tool passing data makes it from CAM , and the metal mold is cut by the machining centre. And, CAM system easily enabled the generation of the NC program though it was not a skill engineer. But the use tool and processing conditions are decided by the skill engineer's knowledge and experience. Therefore, it is necessary to construct the system that supports the decision of the tool and processing conditions. The purpose of our research is to support the decision of the tool and cutting conditions. We paid attention to tool maker's catalog. We extract the tool decision of the cutting condition parameter by using catalog mining in this research. As a result, we were able to find a common rule that was not able to notice only by seeing the tool catalog.