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8020 is an industrial prototyping extrusion made from aluminium. I used it here to construct a chopper by joining the extrusions with water-jet cut plates of 1/4inch aluminum.
Here are some of the options we designed at an MIT IAP class in 2003. The CAD files are all included in this step.
These parts will be cut from 1/4 or 1/2inch thick aluminum plate using a water-jet.
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