The Official U.S. Maple Syrup Almanac 2015 | Page 54

6 With the notch complete, move to the uphill side (or opposite the direction of side lean) to begin the plunge or bore cut. 7 The bore cut is made by inserting the “attack” corner of the bar just behind the hinge, establishing a hinge thickness equal to 10% of the tree’s diameter and cutting toward the back of the tree until only a thin strip remains. 8 With the bore cut complete, insert a plastic wedge parallel to the hinge. 54 U.S. Maple Syrup Almanac 2015