High speed gear chain (Hawa chain) transmitting power for 50~6000 horsepower, more than 3000 rpm to high speed applications, compact design, it is an ideal transmission chain.Elias jaua chain is a kind of high precision gear chain belt, both the smooth and compact chain transmission and long service life. The utility model is characterized in that the friction between the pin shaft of the hinge and the rolling motion of the swinging tile is used to reduce friction and realize pitch elongation.The chain plate is treated by shot peening and pre stress, so that the bearing capacity is larger. Has the power capacity of three times in the silent chain, with high speed range at high speed roller chain work ability decreased sharply, is the ability to continuously improve the Hawar chain. So her chain has on many occasions beyond all dispute, remarkable advantages. Suitable for all applications of high speed prime mover, such as diesel engine and gas turbine power transmission, etc.