{"product_id":"lego-technic-gear-40-tooth-part-3649","title":"LEGO Technic Gear 40 Tooth (Part 3649)","description":"\u003ch3\u003ePower Up Your Technic Builds\u003c\/h3\u003e \u003cp\u003eReady to elevate your mechanical creations? The LEGO® Technic 40-tooth gear is a powerhouse part that delivers unmatched torque and control. As one of the largest standard spur gears in the Technic system, it's your go-to solution for major gear slowdowns (also known as gear reduction), enabling powerful movements in your builds. Whether you're lifting heavy loads, powering a slow-moving crane, or designing a custom gearbox, this gear is a cornerstone of serious engineering.\u003c\/p\u003e \u003ch3\u003eApplications and Creative Uses\u003c\/h3\u003e \u003cp\u003eThis gear is a builder's best friend for transferring power and motion with precision. Its large size makes it a perfect anchor point in complex gear trains and steering systems.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Torque Gearboxes:\u003c\/strong\u003e Use it as the final gear in a reduction sequence to maximize turning power—ideal for vehicle lifts and heavy-duty winches.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTurntables and Platforms:\u003c\/strong\u003e Its broad diameter is perfect for creating stable, slow-rotating platforms for cranes, excavators, or display builds.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePrecise Speed Control:\u003c\/strong\u003e Combine it with smaller gears to fine-tune motion and achieve specific gear ratios in functional models.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eStart building your next mechanical marvel by combining this gear with other essential elements from our \u003ca href=\"\/en-global\/collections\/collections-lego-technic-gears\"\u003eTechnic gears collection\u003c\/a\u003e, as well as \u003ca href=\"\/en-global\/collections\/lego-technic-beams\"\u003eTechnic beams\u003c\/a\u003e and \u003ca href=\"\/en-global\/collections\/lego-technic-pins-and-connectors\"\u003epins and connectors\u003c\/a\u003e.\u003c\/p\u003e \u003ch3\u003eKey Specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePart ID:\u003c\/strong\u003e 3649 (Alternate ID: 34432)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTooth Count:\u003c\/strong\u003e 40\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Spur Gear\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fully compatible with all LEGO® Technic axles and gear systems.\u003c\/li\u003e \u003c\/ul\u003e \u003ch4\u003eA Little Piece of Trivia\u003c\/h4\u003e \u003cp\u003eThe 40-tooth gear is more than just a part—it's a piece of LEGO® history. Introduced in 1977 with the original \"Expert Builder\" series (later renamed Technic), it appeared alongside the 8-tooth and 24-tooth gears. These foundational components made it possible to create real, functional movement in LEGO® models for the first time. Over four decades later, the 40-tooth gear remains a staple in Technic sets worldwide thanks to its unmatched versatility and performance.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eReady to take your build to the next level?\u003c\/strong\u003e Add this essential gear to your toolkit and unlock new possibilities in power, precision, and play.\u003c\/p\u003e \u003cp\u003e\u003csmall\u003eLEGO® parts are intended for builders aged 4 and up. They may pose a choking hazard for children under 3 years old.\u003c\/small\u003e\u003c\/p\u003e","brand":"LEGO","offers":[{"title":"Black","offer_id":52134639042893,"sku":"lego3649blacknew","price":30.26,"currency_code":"USD","in_stock":false},{"title":"Green","offer_id":52134639075661,"sku":"lego3649greennew","price":10.34,"currency_code":"USD","in_stock":false},{"title":"Light Bluish Gray","offer_id":52134639108429,"sku":"lego3649lbgnew","price":3.02,"currency_code":"USD","in_stock":true},{"title":"Red","offer_id":52134639141197,"sku":"lego3649rednew","price":8.02,"currency_code":"USD","in_stock":false},{"title":"White","offer_id":52134639173965,"sku":"lego3649whitenew","price":9.43,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0856\/6715\/2205\/files\/3649-technic-gear-40-tooth-light-bluish-gray.jpg?v=1765526646","url":"https:\/\/www.choose-a-brick.com\/en-global\/products\/lego-technic-gear-40-tooth-part-3649","provider":"www.choose-a-brick.com","version":"1.0","type":"link"}