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  • Users: jstewart
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  1. jstewart

    Plastic Harmonic Drive Gearing?

    Hey all, I'm looking at an idea for a step-up transmission with a ratio around 30:1 - 50:1. The input speed (the low-speed side) is slow, about 100 RPM. The torque required is about 500 inch-pounds, fluctuating (and reversing). Because of the reversing torque, the transmission would need to...
  2. jstewart

    Optimal pole arrangement of air gapped pull assy?

    Hello all, I'm working on a new design (for my company, that is) of a small wheeled carriage that rolls along the bottom of a 1018 steel bar. I would like to use magnets to hold the carriage to the bar. The bar is 1" wide, .1875" thick, and several feet long. I need to maintain an air gap of...
  3. jstewart

    Effect of applied moment on B10 life?

    I am working on a small bearing application (20mm shaft) where the load is primarily radial, with a very small amount of overturning moment. There's not much axial space to work with, and the main candidates in my design are currently a deep-groove ball or needle-roller bearing with a thrust...

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