15 Largest Captive Heat Treats-North America-JATCO

In a heat treat industry exclusive “The Monty Heat Treat News” regularly publishes a list of the “15 Largest Captive Heat Treats-North America”–the topic comes up today because “The Monty” team is in the process of updating our list for 2026.
 
Our 2026 list will see some changes-as a matter of fact we mentioned one change just last week; “Acquisition Effects Largest North American Captive Heat Treaters”.
 
Another change will see the addition of a location which has never made our list in the past, “JATCO” (Japan Automatic Transmission Co., Ltd.) in Aguas Caliente in Mexico. The firm supplies continuously variable transmissions, CVTs (more details below) and maintains a very large vacuum carburizing (LPC) department which consists of 60 carburizing cells with hot and cold oil quenching along with gas quenching. This makes them one of the largest single location captive heat treaters in North America without a shadow of a doubt. Stay tuned for our final list.
 
“AI Overview; JATCO Mexico operates its own captive heat treatment facilities as part of its manufacturing process for continuously variable transmissions (CVTs). This allows the company to perform the necessary treatment for components like gears and pulleys in-house at its plant in Aguascalientes, Mexico. 
Key details regarding JATCO Mexico’s heat treating operations:
  • Integrated Process: Heat treatment is an integral part of JATCO Mexico’s highly efficient and high-quality manufacturing process, which goes from raw materials to the assembled product.
  • Internal Facilities: The company has its own equipment for heating and heat treating metals, including metal-heating furnaces and steel-heating furnaces, rather than relying solely on external commercial heat treaters.
  • Environmental Standards: JATCO Mexico adheres to strict environmental standards, including ISO14001 certification, and actively monitors emissions (such as NOx and dust) from its furnaces and boilers to minimize environmental impact.