{"product_id":"lego-technic-worm-gear-short","title":"LEGO Technic Worm Gear (Short)","description":"\u003ch3\u003eThe Master of Torque and Control\u003c\/h3\u003e \u003cp\u003eThe LEGO® Technic Worm Gear is a small part that delivers immense power. This specialized screw is engineered for one primary purpose: to create massive gear reduction in a very small space. When meshed with a standard spur gear, it translates the fast, low-torque rotation from a \u003ca href=\"\/en-global\/collections\/lego-motors-and-engines\"\u003emotor\u003c\/a\u003e or hand-crank into slow, powerful, high-torque motion. Crucially, it creates a one-way, self-locking system—power can turn the worm gear to move the mechanism, but the mechanism's weight cannot turn the worm gear back. This makes it indispensable for any function that needs to hold a heavy load.\u003c\/p\u003e  \u003ch3\u003eApplications for Lifting and Locking\u003c\/h3\u003e \u003cp\u003eThis gear is the ultimate solution for any function that needs to be both powerful and stable.\u003c\/p\u003e \u003cul\u003e     \u003cli\u003e\n\u003cstrong\u003eCranes, Lifts, and Winches:\u003c\/strong\u003e It is the essential component for any lifting function. Once you stop turning the handle, the self-locking nature of the worm gear will hold the load securely in place without any need for a separate ratchet or brake.\u003c\/li\u003e     \u003cli\u003e\n\u003cstrong\u003ePrecision Steering Systems:\u003c\/strong\u003e Use a worm gear to drive the steering rack in a vehicle. It provides slow, precise control and prevents the wheels from turning on their own, keeping the vehicle driving in a straight line.\u003c\/li\u003e     \u003cli\u003e\n\u003cstrong\u003eLinear Actuators:\u003c\/strong\u003e Build powerful and stable linear actuators for operating functions like outriggers or landing gear. The locking feature ensures they stay firmly in position once extended or retracted.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eCreate your most powerful functions yet by pairing this worm gear with parts from our \u003ca href=\"\/en-global\/collections\/collections-lego-technic-gears\"\u003eTechnic gears\u003c\/a\u003e and \u003ca href=\"\/en-global\/collections\/lego-technic-axles-wheel-holders\"\u003eaxles\u003c\/a\u003e collections.\u003c\/p\u003e  \u003ch3\u003eKey Specifications\u003c\/h3\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003ePart ID:\u003c\/strong\u003e 27938\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Worm Gear \/ Worm Screw\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e High gear reduction and self-locking motion.\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Meshes at a right angle with any standard Technic spur gear.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eA Little Piece of Trivia\u003c\/h4\u003e \u003cp\u003eThis short, single-axle-hole worm gear is a modern, more compact evolution of the original, longer worm gear (Part 4716) that was part of the Technic system for decades. This new design, introduced in 2017, allows it to be integrated into much tighter and more complex assemblies where space is limited. Its compact form factor makes it a favorite among MOC builders for creating powerful functions inside sleek, space-efficient models.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eReady to build functions that can lift anything? Add this powerful worm gear to your arsenal and lock your creations in place!\u003c\/strong\u003e\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":"Dark Bluish Gray","offer_id":52135033471309,"sku":"lego27938dbgnew","price":0.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0856\/6715\/2205\/files\/lego-technic-worm-gear-short-27938-dark-bluish-gray.jpg?v=1766907236","url":"https:\/\/www.choose-a-brick.com\/en-global\/products\/lego-technic-worm-gear-short","provider":"www.choose-a-brick.com","version":"1.0","type":"link"}