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Motorized Scratch Brush

 

Used primarily for cleaning and burnishing metal. The lower translucent tubing supplies water. Should the piece require the help of a detergent, the upper tubing is connected a valve attached to a HDPE gallon jug containing 100% plant-based dish soap. It's a gravity-fed system. A crimped nickel wire goblet brush is attached to the extension arm which was made at a machine shop. The translucent tubing to the left of the image is attached to 1/2" copper tubing via a saddle valve. I attached shrink tubing to the shaft to eliminate scratching in deep objects. The motor runs at 1750 rpm with a shaft pulley of 1" which belt-drives a 3" pulley = 583 rpm.

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