This paper described some mechanical properties of aluminum alloy using agro-waste materials such as sawdust, groundnut shell, and eggshell. The sand-casting method was adopted to produce the alloy with 5, 15, 25, and 35% wt. additives. The microstructure of the various samples produced after quenched in water, palm oil, and engine oil was examined while hardness properties were determined. The result obtained shows that hardness values increased with an increase in the addition of sand mold Agro-waste ashes. Samples cast with eggshell ash additive and quenched in water coolant had the highest hardness value of 82.4 at 25% wt. additive when compared with sawdust ash and groundnut shell ash additives. sand-casting enhances the hardness of the specimens and thus, can be used in many engineering applications such as engine blocks and wheels in automotive parts and aerospace components.

NCAM motorized coconut dehusking machine was tested for its performance. The objective of the test is to optimize the dehusking performance of the machine. Different sizes of coconut fruits were fed into the machine and the time taken for each fruit to be dehusked was noted. A total number of 60 matured Badagry coconuts from Lagos State, Nigeria were dehusked with the machine. The performance evaluation shows that the efficiency of the machine was 90.1% while the average capacity is 122 coconuts per hour. The percentage number of distorted and broken coconuts was 10% and 0% respectively. Hence, the machine is suitable and recommended for small, medium and large scale coconut processors.