The technology for grinding camshafts and crankshafts with vitified bond CBN is discussed. The wheels have strong abrasive retention, long life and chip pockets which are easy to dress. There are advantages from two viewpoints. The first is the process can utilize a small-sized machine and reduced initial tool cost due to the use of wheels of the smallest diameter which is calculated taking machine and machining method into consideration. The second consideration is high-efficiency grinding technology using vitrified bond CBN wheels of concentration 150 and high-speed grinding technology.