Research and Development of Macadamia (Macademia spp.) Nut Husker

Abstract

The main objective of this research was to design and develope the macadamia nut husker. The design and macadamia husker development was consisted of two parts namely shell screw and pressure plate shell screw had 1,150 mm for screw length, 68 mm for pith width, 90 mm in diameter and operated velocity at 330 rpm. The one horse power was used as a motor in this experiment. Pressure shellers had 4 sets and dimension of width x length x thickness was equal to 36 x 195 x 6 mm. Testing was conducted at the Chiang Mai Royal Agricultural Research Center (Doi Khun Wang) in July, 2552. The results showed that the capacity to work as an average was of 660.86 kg/hr, the seed obtained was 88.63% and uncompleted seed was 6.0%. The development was made to adjust the tested prototype according to unproper use found at the Chiang Rai Agricultural Research and Development, Chiang Rai province (Doi Wawee) in August, 2552. After being improvement, the results showed that machine had an average capacity at 618.10 kg/hr. The percentage of complete seed as an average was 99.50%, and uncompleted shell 0.5% and 5,181 kg/yr for break even point.