Math Gears Free 3D print model

cgtrader

NEW VERSION!!! POSTED 12-29-13 At first glance, updates seem almost insignificant, but every piece has been meticulously revised and rewritten from scratch to enhance assembly, fit, and operation smoothness. This Math manipulative was designed with a playful twist in mind - everything you see should bring a smile on your face right away. When used at desktop level, it also fits perfectly for overhead projection systems. The real fun begins when you explore the several simple ratio exercises hidden behind the engaging mechanics. The eight-tooth "Idler" gear adds reverse rotation without altering ratios in any way, ensuring seamless results every time. Interchangeable gears feature innovative built-in graphics indicating tooth count as well as rotation position for utmost clarity and convenience. To further support your endeavors, refer to: http://en.wikipedia.org/wiki/Gear_ratio. Rubber bands take care of providing optimal tension so that wheels stay engaged regardless of the combination used.