I have a requirement of a motor (for a mixture machine) which is conventionally being met by a 10 hp, 3 ph, AC motor(4pole, 1440 rpm). The mixture blabes run at 15 rpm. This reduction in rpm is done using belt pully drive(small pully the driver & bigber the driven) in conjucation with a reduction gear box. My quarry is, in case I use a slower rpm motor (that would help me in reducing my rpm reduction train), say a 8 pole, 750 rpm motor can I select a lower hp motor say 5 hp or may be 6 hp as both the motors would give me the same torque at the mixture blade at the same blade rpm. My purpose seems to be getting met using a lower rpm, lesser hp motor. Please suggest & clarify. Will it even save input electric power as a 5/6hp motor uses less ampeers compared to a 10 hp motor. My input electric power is metered in terms of KVAH amd hence any change in power factor will also cnange my input electric power consumption.