March 31, 2020
Aluminum Oxide Grinding Wheel
Here is an aluminum oxide grinding wheel, 220 grit, meaning the average particle diameter is 68 micrometers. Due to its hardness, aluminum oxide is used as a cheap substitute for industrial diamond.
Equipment used: Canon EOS Rebel T5i with a standard zoom lens (EF-S 18-55 mm) on a 49 mm long extension tube.
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