Wearing Out Your Sole

3925 Adjustable Spot Cooler
3925 Adjustable Spot Cooler

A shoe manufacturer had a special abrasion test that was required by his customer to test special rubber compounds. The set up was to run a small chain across the bottom of the rubber sole.  The chain was looped to continuously rub against the sole of the shoe.  As they began their wear testing, they noticed that the chain was getting hot from the friction.  The heat would get high enough to change the composition of the rubber and cause a premature failure.  To properly test for wear, they needed to cool the chain.

As they discussed their application with me, they required the chain to be at a specific temperature. I suggested the model 3925 Adjustable Spot Cooler System.  This system comes with a dual point hose kit, a magnetic base, a filter separator, and two additional generators.  The generators of the Adjustable Spot Cooler are a piece which controls the total volume of air through the cooler. They can be switched in and out to produce more or less cooling capacity of the Adjustable Spot Cooler. The main concern was to keep the chain temperature constant.  With a temperature control knob and the additional generators, they could dial in the cooling capacity to keep the chain at the desired temperature.  If the chain was too cold, the sole would not wear properly, and if the chain was too hot, it would change the composition of the rubber material.

They mounted the Adjustable Spot Cooler to the abrasion machine with the dual points blowing on each side of the chain. They quickly noticed that they could keep the chain cooler than the specified temperature.  As a trial, they replaced the generator to the 30 SCFM (850 SLPM) flow rate.  This increased the cooling capacity of the Spot Cooler.  With the higher cooling capacity, they could increase the speed of the abrasion machine to shorten the failure cycle.  This was a great benefit to have as they were testing different rubber compounds to determine the best product; a pronounced advantage in research and development.

If you find out that heat is causing problems in your application, you can contact an Application Engineer at EXAIR for help in finding the correct cooling product. In this instance, friction was the culprit and the Adjustable Spot Cooler was the solution.

John Ball
Application Engineer
Email: johnball@exair.com
Twitter: @EXAIR_jb

R&D…&D Research & Development Daily


I tend to find myself doing quite a bit of research, whether here at work or at home.   Any time I am looking to buy something or test something I am constantly trying to find out if someone has already done it or if they haven’t, can I get my money back if it doesn’t work. Whenever I am trying something new, I always want to make sure I have all the information and just in case it still doesn’t work, be able to minimize my out of pocket cost in the end.

This is why, when you call EXAIR and ask us for a custom product when you are just trying something out, we offer a stock product first to get a base line.  If the stock product doesn’t exactly fit, say you need a 20.5″ long Super Air Knife, we would recommend to test either an 18″ or 24″ stock Super Air Knife to see if it is a viable option.   Once you have tested the stock length then you can simply let us know, within 30 days from the date of purchase, and return the unit.  Then place the order for the custom product that is exactly what you want.

Special Super Air Knife

Not only do we work with you and try to get you exactly what you need, we also will pull from all the experience that the entire company has to help you figure out what is going to work best for your application.   Not to say we have seen everything and done everything, but we are pretty darn close.

If you have any questions or need help with a research and development project you might be working on, give us a call, email, fax or chat.

Brian Farno
Application Engineer