Over the years, JN Machinery has done several articles and other published works. We are making them available for our customers to be able to access anytime. 

Heat Treat More Products Using Less Energy

A study on the efficiency of ovens Is one 12" wide conveyor oven the same as other maker's 12" wide conveyor ovens? If so, shouldn't you just purchase the cheapest oven among your choices? Each maker will try to show why their oven is the best one for your application...

read more

Buying a Used Conveyor Oven

So you want to buy a used conveyor oven. f you haven’t thought of it yet, you may soon ask yourself, “Why not take advantage of the good deals for a used conveyor oven?”

read more

Evaluating The On-Line Stress Relieving Process

On-Line stress relieving was basically started by the Japanese in the early 1970’s. It was a process aimed to streamline production and greatly improve technology. The concept moved to the USA in the late 70’s using conveyor furnaces imported from Japan (Gasden Ro). Today, fast-cycle/high- temperature on-line stress relieving is the preferred method used by spring makers. JN Machinery was the first USA manufacturer to build on-line furnaces starting in 1982 and has over 2500 furnaces operating in spring plants throughout the world.

read more

Troubleshooting Oven Issues

JN Machinery receives a lot of phone calls related to the technical aspects of stress relief or whether an oven can handle a specific task. On occasion, we get calls because an older oven is not acting like it should, or an oven has been ignored way too long. This article will focus on those calls, and what an operator or maintenance person can do for themselves to troubleshoot. When we categorize the themes of these calls, there are two that stand out: the (non) heating function and the (non-moving) conveyor function.

read more