Gnome, Goblin and Mechagnome hunters automatically know how to tame Mechanicals. Hunters of other races must acquire the skill from a Mecha-Bond Imprint Matrix, crafted by Engineers who have at least 1 skill point in Legion Engineering.
Located in Engineering Labs, Gnomeregan (Dungeon). Friender is initially asleep and unattackable. Solve the light-button puzzles on three walls to activate him. Use all your defenses, as he hits very hard!
*This creature's level will vary with that of your character, within the constraints of its level range.