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Thats the best idea yet. I'll look for even smaller ones

Thanks everyone for all of the ideas. I have some studying to do.

I think lubricants are out of the question because the device needs to be portable, dry, and maintenance free. Also it has to be as low as possible. I thought of just a metal plate with some sort of roller bearings under the pedal, but it might raise the pedal too much to be useful.

Hello engineers, Newbie here. I need is a suggestion for materials. I'm building a prototype for a device which consists of a foot operated pedal that must move freely around a roughly 24"x12" horizontal plate. The key to its success will be to reduce friction between the pedal and the surface...