b'SO EXOTICS Picking the threading process for difficult-to-machine materials can be hard.By Larry AdamsE xotic metals are more popular than ever as industrial designers and man-ufacturers take advantage of the properties exhibited by these materials, such as high strength-to-weight ratios, excellent corrosion and oxidation resis-tance, and strength and hardness retention at high temperatures. But proper-ties that help make great finished components also may make machining parts a challenge throughout production, including threading.Manufacturers usually have two main threading methods from which to choose: tapping and thread milling. Tapping is traditionally the go-to method for cutting threads into standard metal parts but can be challenging with these hard, The line of thread mills from YG-1 Tool (USA) for exotic materials has short thread lengths to minimize engagement between a part and a thread mill.(USA) ToolYG-1 62AUGUST 2020 Threading.indd 62 7/17/20 3:34 PM'