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First of all I would recommend you the documenzt VDI 2230 - "Systematic calculation of high duty bolted joints". The document is bi-lingual (German and English) and among some (german) books the source of my post. First of all some design 'tips' which ma be useful depending on your application and the tools at hand: Use higher tightening torque if possible....


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The simplest way to achieve this in my mind, is with two gears - one should have a drum attached with the rope wound around, and the other has the arm attached. One benefit of this method, is that you can have the gears sized such that pulling the string a long way causes the output arm to rotate more slowly than the input gear - this will give you more ...


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