A bore can be used with most felling methods and can be applied regardless of guide bar length and tree size. It is essential that the bore method is carried out in the manner described in this paragraph. If you depart from this method, there will be a major risk of kickback as the tip of the guide bar is used first.
Apply full throttle and apply the bottom part of the guide bar tip (pulling chain) slightly behind the proposed hinge width. When the guide bar tip has entered, the guide bar is turned carefully until it is parallel with the directional notch. Now push the guide bar into the tree as deep as necessary. Adjust the hinge width at the end.