savarin, thanks for the offer. Yes, the heavy wheel acts like a flywheel. The picture I posted is a twin of the bike I have. I've seen several variations of exercise bikes adapted to drive these grain grinders. The design will still allow me to use the exercise bike as intended (i.e. fully functioning with resistance control and speedometer). When I want to grind some grain I'll just slip the belt over the small pulley I've installed onto the bike. Look at the first bike at the top of this web page.
http://www.countrylivinggrainmills.com/hooking-up-your-mill-to-an-exercise-bike/
http://www.countrylivinggrainmills.com/hooking-up-your-mill-to-an-exercise-bike/
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