Gyratory Crusher NT The TC Gyratory Crusher model gave Fuller Traylor Engineering a reputation throughout the worldwide mining industry as a provider of reliable, high quality equipment. After acquiring Fuller Company, FLSmidth has taken this original TC design and expanded on it to develop the NT line. Safely accomplish more during shutdowns while increasing operational availability. The Gyratory Crusher NT incorporates all of the TCs heavy-duty design features (Heavy Cast-Steel Shell Sections, Forged Main Shaft and Countershaft, Robust Gearing, Generous Lubrication, Long-Life Bronze Components) and focuses on coupling these historical characteristics with updated maintenance-friendly features.