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Try #2. Made a smaller mold. |
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Filled with liquid rubber. |
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The cavity for the missing teeth. |
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Nice clean mold. The rubber for casting the bore will be filled next. |
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The gear is turned 180 degrees so new teeth cavities will be made in the mold. |
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Liquid rubber is poured on to the gear and the bore of the gear is filled. |
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Once the rubber has cured (over night) the top is shaved off to reveal the gear. |
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The finished mold. |
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A small dam is built up around to contain the resin. Not needed I discovered. |
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The finish cast gear. |
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I made a fixture to hold the gear on the lathe to clean up the back side of the gear. |
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Two new gears identical to the one with two teeth missing. |