The macadamia nut is one of the world’s finest dessert nuts and its production is expanding constantly. However,
a major factor in its relatively high production cost is the unsatisfactory results achieved in the retrieval of good quality
kernels. The poor recovery of the nuts is a result of un cracked or incompletely cracked nuts, and of kernels discarded in the
bulk of shells due to imperfect shell and kernel separation. While extensive research has been conducted on cracking
principles pertaining to macadamia nut, and some machines are already in commercial use, the problem of efficient
separation between kernels and shells basically remains unsolved.