I have with me an existing Agitator details of which are as below Motor= 2.2KW/ 3 HP, 1440 Rpm Gear Reducer = ratio 40/1 Agitator Shaft RPM= 36 Agitator Shaft dimension Length = 2500mm round bar , SS 304 Blades = 5 nos, 100 mm wide, 5 mm thick, dia = 2200 mm, at a distance of 400mm each, ss 304 weight of the agitator shaft & impeller assembly = approx 177 lbs Purpose of agitation : Alum tank agitator density ~ 1.3 - 1.4 Now i need the one more exact assembly to increase the capacity of my Plant, however i have no clue how to derive the absorbed power at the agitator shaft or the torque requirement to drive the agitator shaft. I have basic knowledge of gear reducer selection for which i need to calculate the absorbed power. Can someone please suggest how to do that. Also is it possible to directly select the Gear reducer based on the motor input KW ? If so then how ? Thanks in advance.