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The APIT Length Grader uses an indented cylinder to separate one or two kinds of broken or shorter grains from whole grain by length. Length graders are indispensable for producing high quality products in rice milling and seed cleaning plants, since the broken or shorter grains that are more than half the length of whole grain are difficult to separate through sieving or thickness / width grading.
The grains which are longer in length drop out of the indents before they reach the catch trough. The grains which remain in the indent are thrown into the catch trough.