Although the macadamia is native to Australia, processing of macadamia nuts began slowly with early enthusiasts cracking the nuts by hand. The first commercial macadamia processing plant was not established until 1954. Modern machines have been developed to crack the tough shell of the macadamia without damaging the precious kernel within. These machines have either a fixed blade and cutting blade, or a combination of rollers and a base plate to compress the shell.We have roller cracker with sorting, the nuts pass through a roller system and are separating from the shell on a vibrating conveyor.