New methods for OJT (On the Job Training) is required as aging and resignation of expert engineers and globalization of manufacturing industries cause the difficulties for effective OJT in conventional skill education. A probable solution is skill education with e-Learning that has advantages on the involvement of elderly expert engineers and the training in remote shops. However, no e-Learning system is currently available for skill education in manufacturing domain such as training of operations of machine tools. In this paper, a new OJT system with e-Learning on manufacturing techniques is proposed. Important elements of skill education for a new OJT system are identified and the problems are clarified that arise when an educator is not available. A new OJT system including a mobile robot with an arm is proposed to solve these issues. A prototype of the system is built and its effectiveness and feasibility is shown through the experiment.