*Throat Plate, Line Gauge, Chain-Off, Medium Work with Medium Needle Hole Guaranteed to fit Juki Sewing Machine Models: DDL-552, DDL-555-4, DDL-8500, DDL8700, DDL8700-7 Role of the feed The feed has the following roles: (1) To move the sewing material along on a stitch-by-stitch basis (2) The amount by which the material is moved can be changed to form a seam which matches the sewing material. (3) Stretching/shirring is possible, depending on the "feeding method", to prevent puckering or to promote gathering. 2. Type of feed (1) Bottom feed The bottom feed is the standard feeding method which feeds the sewing material only by means of the bottom feed dog (the feed dog located under the throat plate).