Turn your LEGO® 42112 Concrete Mixer Truck into a mesmerizing Great Ball Contraption!
Discover our GBC 42 Linear Loco Lifters — an incredible alternate build featuring synchronized vertical lift arms, clever gearing, and hypnotic ball movement. Built entirely from parts of the LEGO® 42112 set, this model is perfect for LEGO Technic and GBC fans who love engineering challenges.
What makes it awesome?
🔹 Uses only parts from LEGO® 42112
🔹 Beautiful synchronized lifting motion
🔹 Learn gearing, timing & automation mechanisms
🔹 Hand-powered with optional motor upgrade
🔹 Great for beginners and advanced builders alike
Whether you’re starting your first GBC loop or expanding your collection, this build delivers endless engineering fun. 🧠🛠️
🎥 Watch it come alive and start building today: