From the above result it can be concluded that the optimum tilt angle for paddy rice separation is 3° as it has the highest ET and pp. Overall efficiency of machine which ranges from 50 – 71 % which was an improvement on the 20 – 61 % reported by [6] for paddy rice with sphericity of about 40%. Though [14] reported overall efficiency of 84 % with chickpea that has sphericity of about 85 % indicating that higher overall efficiency are obtained where grain shpericit is high. Further cleaning by re-introducing the product into the machine will further increase all the various efficiencie and a near 100 % Pp will be obtained. The cost of production of the prototype was 450 USD. Commercial production of this cereal cleaner will be viable as they shall be utilised by the small scale rice processor in the country.