Largest Vacuum Carburizing Furnace in North America

Here is a trivia question for you-what is the largest vacuum carburizing furnace in North America? We believe it to be this SECO/WARWICK unit located at Stack Metallurgical in Portland, Oregon, USA. With working dimensions of 72″ X 72″ X 72″, oil quenching and a weight capacity of approximately 10,000 pounds we have yet to see a larger unit in North America. Designed for large
gears these photos do not do justice to this monster. By the way next week we will have a profile of Stack telling you all about the company.