March 31, 2020

Aluminum Oxide Grinding Wheel

Macro and Micro Picture of the Day 2020-03-31

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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