Setting key for plane iron in tenon tapering plane

A method for mounting a plane iron to a tapering plane at a specific desired tapering angle using a setting key, the method comprising:

• inserting the setting key into a setting key function slot that has an opening along a circumference of a mortise of the tapering plane, such that a first edge of the setting key is nested in the setting key function slot, and a second edge of the setting key, positioned opposite to the first edge, protrudes into and radially bisects the mortise of the tapering plane, such that the second edge provides a surface spaced from the mortise edge and is positioned at an orientation that differs from a longitudinal axis of the mortise by the specific desired tapering angle;
• placing a cutting edge of the plane iron to align with the second edge of the setting key so that the plane iron is oriented at the specific desired tapering angle relative to the longitudinal axis of the mortise of the tapering plane;
• and
• attaching the plane iron to the tapering plane at the specific desired tapering angle.