Printed from: https://finalhbks.asgoodasready.com/toolcare/sharpening/billhooks-and-slashers/
Normally you should grind the blade at the same angle as it was set. Usually the edge has merely become blunt, and you can take the angle from the face immediately behind the edge, called the sharpening bevel. You are grinding quite a large area, so it may take longer than you expect. Resist the...