STEEL BELTING This type of belt has been used with considerable success in Germany since 1906 but results in the United States have not been as satisfactory. The steel belt is used in the same manner as the leather belt, except that it is narrow, thin and of very light material. It is put on the pulley with a relatively high initial tension and hence runs without sag. The material used is fre quently a charcoal steel, prepared and hardened by processes that are for the most part secret. Steel belts are not adapted to tight and loose pulleys, but crossed belts will work satisfactorily, pro vided the distance between the shafts is held above a certain pre determined ratio to the width of the belt. Sometimes several steel belts are used with one transmission. (W. STA.)