From the top: fine, medium and coarsely cut oats groats (i.e. steel-cut oats) Bottom: Uncut oat groats
The grain is cleaned, sorted by grain size and peeled (if necessary) before being husked. Additionally, the grains can be sliced on a "Groat Cutter" which can be adjusted to cut fine, medium or coarse groats. Regardless, thereafter the groats are freed from any adhering parts of the shell by a brushing machine. In the case of cut groats their fragments are sorted by size by sieving.