Abstract: An improvement in a continuous flexible drive, preferably a chain, broaching machine in which a transmission, preferably a worm-worm gear speed reducer transmission is connected to a driving motor and to a sprocket, or a pair of sprockets, carried by a drive shaft which in turn is connected by chain means to a sprocket or a pair of sprockets on a shaft which drives the chain means of a chain broaching machine. The input unit including the transmission is designed in conformity with the drive end of the broaching machine to permit placement of input drive mechanism in different positions so as to provide freedom in placement of a plurality of broaching machines without interfering with each other.