{"product_id":"water-mill-experiment-kit-waterwheel-gears-cam-driven-pestle-stem-model","title":"Water Mill Experiment Kit – Waterwheel, Gears \u0026 Cam-Driven Pestle STEM Model","description":"\u003ch2\u003eBuild a tabletop waterwheel and mill\u003c\/h2\u003e\n\u003cp\u003eWatch flowing water turn a shaft, rotate a mill disc and move two pestle mechanisms up and down. A crank also permits a dry demonstration of the linked mechanical transmission.\u003c\/p\u003e\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cp\u003eWater acting on the wheel blades rotates the wheel and shaft. Gears transfer rotation to the mill disc and change its axis. Cam-like shaft projections lift the pestle levers; when released, the pestles fall back down. The open construction makes water power, gear transmission, cams, levers and reciprocating motion visible.\u003c\/p\u003e\n\u003ch3\u003eIllustrated components\u003c\/h3\u003e\n\u003cp\u003eMill disc and base, waterwheel and retaining cover, 8-tooth gear, main base, two shaft supports, two type-A and two type-B pestle supports, crank, two pestles, shaft and cylindrical pin. This supplier table has 13 component categories, not 13 individual pieces; check actual contents against the supplied version.\u003c\/p\u003e\n\u003ch3\u003eAssembly and use\u003c\/h3\u003e\n\u003cp\u003eAssemble both pestle-lever units and mount them over the base recesses. Fit the shaft and supports, orient its projections to engage the levers, assemble and mount the waterwheel, then fit the gear, mill disc and crank. Check movement by turning slowly. Place the model in a tray before directing a small stream of water onto the blades. Water source and spill tray are user-supplied.\u003c\/p\u003e\n\u003ch3\u003eSupplier-stated specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eApproximate assembled size: 17.7 × 10.3 × 8.3 cm (not packaging dimensions)\u003c\/li\u003e\n\u003cli\u003eMain material: ABS plastic\u003c\/li\u003e\n\u003cli\u003eSuggested age: 8+, with adult guidance\u003c\/li\u003e\n\u003cli\u003eWater-driven or hand-cranked mechanical operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis is an educational model, not a vehicle, food-processing appliance, pump or electrical generator. Contains small parts. Keep fingers clear of moving mechanisms; stop if it jams. Use water away from electrical equipment and sockets, control splashes, and drain and dry before storage. Do not ingest experiment water or components.\u003c\/p\u003e","brand":"RetroMakerKits by innoelement","offers":[{"title":"Default Title","offer_id":67621213929555,"sku":null,"price":9.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/0891\/1443\/files\/215dceef-3db9-4808-8d53-4d90ec0687aa.png?v=1791461585","url":"https:\/\/www.retromakerkits.com\/products\/water-mill-experiment-kit-waterwheel-gears-cam-driven-pestle-stem-model","provider":"RetroMakerKits by innoelement","version":"1.0","type":"link"}