The performance parameters of the machine including Percentage of whole seed, broken seed, partially shelled fruit, unshelled fruit, machine efficiency and decortications efficiency, were evaluated at four different moisture content (7.97%, 10.53%, 13.09% and 15.65% d.b.) with a combinations of concave clearance (18 mm, 21 mm, 24 mm and 27 mm) between concave sieve and rotating blades