The World’s Leading Manufacturer of Electric Conveyor Ovens for Heat Treating Steel Springs

JN Machinery was founded in 1985 and currently has over 4400 furnaces in operation worldwide.

All of JN’s conveyor ovens are designed and built in our Chicago fabrication plant and has thrived on its original partners’ combined 95 years of experience in the Spring & Stamping Industry and relies on its newest partner’s extensive international business experience to offer the highest quality and most economically designed On-Line furnaces in the industry on a global scale.

The history of JN’s electric conveyor furnace began as a unit of North American Spring & Stamping Corporation in 1982. NASSCO developed conveyor furnaces for its own internal use, and the furnace had quite an impact on quality and productivity. JN Machinery Corporation was established as a new independent company in 1985 JN is a company born by a Spring Company, For Spring Companies.

Electric Conveyor Ovens for Heat Treatment for Steel Springs

Spring manufacturers use JN Machinery’s conveyor ovens for heat treating and stress relief of springs made from carbon, stainless steel or chrome silicon.

JN Machinery has been instrumental in the development of and setting the standards for electric conveyor furnaces in the application of stress relieving springs and heat treating metal. We have published numerous studies proving that in most applications, on-line, continuous heat treatment for springs is superior to the traditional batch method using large industrial ovens.

Therefore, JN has the capability to understand your stress-relieving needs, as well as the importance of a reliable and efficient manufacturing process.

JN was also the first company to develop and market an automated paint system called TRC (Tempering, Rustproofing, Color Coating). The paint system works with a special water-based polymer that will only bond to metal when it is >350`F(177`C). JN’s paint system utilizes the residual heat of the parts exiting the conveyor furnaces and immediately immerses the parts in the polymer. The results are coated and dried parts in approximately 2 minutes, all without additional labor.