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.
Location & Notes:
Located in Fungal Rock, Un'Goro Crater. Found deep in the Fungal Rock cave, at the northern end. Her health must be severely reduced (perhaps 25% or lower) before she can be tamed. She hits very hard and can badly hurt you, even at level 60, so you will have to kite her.