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Contact wheels for the size challenged

Doug Ward

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the aluminum side plates were cut by waterjet. I rolled the rim from 1/2x4 inch aluminum on a three ring roller. then welded the whole thing up. I mounted the aluminum wheel on its drive shaft and under power i used a angle grinder mounted on a slide to sand it until it was true. i then removed it and layed it on its side. i made a outer ring from sheet metal about 1.25 inch larger in diameter than the aluminum wheel (coated with mold release). every thing was put in place and sealed with wax. two part urethane was mixed and poured into the gap between the ring and the aluminum wheel. once cured it was again mounted on its drive shaft and trued with an angle grinder. it came out much better than i hoped. i am using a large 3 phase motor with a variable frequency speed control. a large motor is needed to provide torque at low speeds. the belts are approx 4x 130 inches. :)

Edited by john marcus

infinite edge cutlery

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