The present invention is related to a method for implement regulation for an agricultural machine (1) comprising a frame (2) and at least a with the frame connected, in the driving direction transferred row (a, b) of implements (3), preferably in the form of freely rotatable journaled discs (3), each disc being connected to an arm (10, 110), which is journaled at the frame (2). The method comprises that a hub (20, 120) of each disc (3, 103) is provided with at the middle of the hub a journalled bearing part (21b, 121b) of the shaft (21, 121), which at its other end has a coupling part (21a, 121a), the centre axis of which is angled an angle (β) in relation to the centre axis of the bearing part (21b, 121b), and in that the shaft is formed so that it corresponds to a form part (142) of an end portion (23, 123) of the arm (10, 110), whereby a form tied and force tied coupling can be achieved in at least two pre-determined positions by tightening a screw joint (30, 130).
