How to make machines mini from drill /how to make drum sander /how do we homemade mini sander

How to make machines saws, cutting, grinders mini from drill /how to make drum sander at home/how do we homemade mini sander at home /how do we homemade mini drum sander at home
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Previous Video Drill Machine; https://www.youtube.com/watch?v=c_6H3_c935k&t=7s