Axial load capable torque tube assembly and manufacturing methods thereof

A method for manufacturing an assembly for transmitting torque to an aircraft actuator, the method comprising:

• forming an end fitting such that the fitting includes:
• a connector portion;
• an engagement portion;
• a first end adjacent the connector portion:
• a second end opposite the first end;
• and an outer coupling surface between the first and second end;
• creating a continuous groove on the engagement portion such that it includes two axial grooves that extend along a longitudinal axis of the end fitting and a first parallel groove that extends circumferentially about the longitudinal axis and joins the two axial grooves, wherein the continuous groove further includes a third axial groove and a second parallel groove, the second parallel groove connecting one of the two axial grooves to the third axial groove and the first parallel groove is at the first end and the second parallel groove is at the second end;
• inserting the second end of the end fitting into a torque tube;
• and
• electromagnetically forming the torque tube to the outer coupling surface of the engagement portion.