26 Jul

Jar Mill

Ok , you’re curious enough to open this blog and questioning to yourself, Jar Mill?  I had a customer contact me last week for more information on this device, which in all honesty, I had no idea what this was.  At first glance, one might think it to be a pasta maker.  But all kidding aside, the Jar Mill pictured at the left is designed for the milling of small patches of ceramic or similar  materials into specified size or consistency.  A Good example to help better understand what application this jar mill might be used for, is as follows:   Say for example you have some crystalline potassium nitrate that looks like sugar, and you want to turn it into a fine, talc-like powder.  You place the potassium nitrate into the Mill Jar like the ones pictured on the right and start turning.   These jars have a special high-wear, alumina-fortified porcelain body, which increases durability and reduces contamination.  The jar interior is unglazed, giving it a rough texture.   Another analogy of the process is like the rock polisher that I bought for my kids when they were younger.  A small particle size is important to good chemical reaction.  The smaller the particle size, the greater the specific area, hence the most complete and in most cases, fastest reaction.”

The mill uses two rollers, one convex, one concave which allow the jar or container to automatically center.  This also prevents the container from creepage and minimizes breakage.  At the same time, with this kind of  roller configuration  there’s no need to clamp or fasten the jar to the frame.  In closing, I found the process fascinating and it gave me an appreciation and better understanding of how some powders got that way.  Certainly, I would think that a Jar Mill would produce a more consistent powder than using a hammer.   StephenG