We have a wide variety of abrasive media options, and we provide important information about each one. Abrasive media is not one size fits all. It depends on your project, so be sure you are getting what you need. If you have questions please call or email us. There is also a wealth of information on this page about abrasive media types and uses.
Shop & Buy Abrasive Media
We can sell media in 50 pound increments and provide multiple pallets. Pricing shown does not include shipping. This page has detailed information about abrasive media. Please let us know if you need help or have questions about quantities.
Affordable Abrasive Media
All of our abrasive media is available in multiple grit sizes. We can provide small volumes of 50 pounds and ship multiple pallet loads. Please let us know what you are looking for if yo don’t see it. We have aggressive media pricing and can ship almost anywhere.
Factors in Choosing an Abrasive Media
Abrasive Media – Hardness, Shape, Size and Density
Choosing an abrasive media for a specific project can be complex. First, a discussion on the hardness of the abrasive. Second we will consider the shape of the abrasive. Next a look at size and finally a quick peak at density. Finally, as we close out the discussion we introduce the concept of velocity. While not a property of abrasive media it can greatly effect how any abrasive behaves.
Why Abrasive Media Hardness is Important
Abrasive media hardness is very important. In general, the harder an abrasive is the faster it will remove surface material. Of course being fast is not always the most important factor in selecting a blast abrasive. Penetration and finish are mutually important considerations. Scroll down for some detail on how abrasive hardness is measured.
Abrasive Media Hardness
Abrasive media hardness is an important characteristic when choosing an abrasive for a blasting project. Media hardness is measured in several different ways. The first is called the Mohs Scale and the second is the Knoop Hardness Number.
In 1812 Friedrich Mohs, a German mineralogist, began testing one mineral against another. As a result he tested and documented how one mineral could (or could not) scratch another. Finally, his efforts bring us to the Mohs Hardness Scale.
Knoop Hardness Number
This is a simple concept with very complex science behind it. This number is the hardness of the material being studied. A diamond tipped instrument is pressed into the surface of the material. And, a specific amount of force for a specific amount of time will indent the material.
Abrasive Media Shapes
The shape of abrasive media primarily effects the cutting depth into the blasted surface.
Abrasive Media Sizes
|Abrasive Type||Example Mesh (Grit) Sizes|
Size is a straightforward characteristic. Abrasive media size is typically measured in mesh size. Some refer to it as “grit size”. The important thing is to pay attention to the number. In order to do that, however, we will first explain what a “mesh” is.
Abrasive Size Overview
In general, the bigger the abrasive molecule, the bigger the impact it makes on the blasted surface. For example, dropping a bowling ball onto wet cement will make a bigger splash than a baseball. However, in a blasting cabinet, larger particles means fewer impacts on the blasted surface. This is compared to smaller molecules that make more frequent impacts. Think about tossing 10 marbles into a pond or 100 tiny ball bearings. Both those volumes will fit into a cup but the ball bearings has 10 times the number of impacts.
We will, for now, ignore mesh shapes, weaves and composition. The technical definition of mesh is the number of lines per square inch in a sieve. Again, we approach this simply, it can be complex. Imagine the holes in a pasta strainer. If the strainer (sieve) has 60 holes per inch, we would classify it as a #60 mesh. For our example we will consider an abrasive labeled 60-100. Now, if we pour the 60-100 abrasive through a sieve, roughly 95% of the abrasive will pass through a 60 mesh sieve but not through a 100 mesh sieve.
Abrasive Media Density
Density is a term that describes how much mass exists per unit of volume (a unit commonly called specific gravity). It is not the same as an object’s weight. Remember the old riddle of a pound of feathers vs. a pound of lead? Equally one pound. But lead is significantly denser than a feather so it takes less lead to get to a pound than feathers. Beyond the science involved, abrasive media and density is really about the abrasive and its ability to impact the blasted surface. As an abrasive particle is accelerated by a blast gun, it impacts the surface. The denser the particle the harder and deeper it will impact the blasted surface. Additionally, the more dense the abrasive particle the less it will deform upon impact. That means it has the potential to last longer than less dense abrasive media.