This research aims to study the working process of grinding in manufacturing charcoal. To increase performance in the grinding process of coal with Ban Kut Phiman farmers, Dan Khun Thot District, Nakhon Ratchasima Province. This research has a period of research since January to April 2559 the theory about Mechanical design and machining parts, quality control Control Chart to build a coal pulverizer to increase efficiency in the grinding process of charcoal of farmers.