the stahli series of machines for cylindrical lapping machines made by the stahli group set the standards for quality and roublefree processing throughout the world. they embody all our know-how and experience in developm......the stahli series of machines for cylindrical lapping machines made by the stahli group set the standards for quality and roublefree processing throughout the world. they embody all our know-how and experience in development, manufacture and use.