Thunderstorm Bricks Compact Booster – High-Performance 1:3.5 Custom Gearbox for LEGO Builds
Enhance your LEGO creations with this precision-engineered custom gearbox, offering a 1:3.5 gear ratio in an ultra-compact 3x3x2-stud form factor. Designed for builders who demand efficiency and durability, this gearbox is perfect for high-speed applications or power-intensive mechanisms.
Key Features:
✅ Ultra-Compact Design – Fits within just 3x3x2 studs, making it one of the smallest high-ratio gearboxes available for LEGO.
✅ Low Friction, High Efficiency – Unlike standard LEGO gear assemblies, this gearbox minimizes energy loss, ensuring smoother motion and improved performance.
✅ Coaxial Input & Output – The drive axle remains on the same axis as the output, allowing seamless integration into compact builds.
✅ Bidirectional Functionality – Can be used as a speed booster to increase RPM or as a torque amplifier to enhance power, depending on the direction of input.
✅ Extreme Durability – Built to withstand high torque and prolonged use without significant wear, making it ideal for motorized LEGO builds, robotics, and custom MOCs.
✅ Optimized for Tight Spaces – Perfect for modifying vehicles and compact mechanisms, where traditional gear assemblies are too large to fit.
✅ Sealed for Protection – Unlike standard LEGO gear systems, this gearbox is fully enclosed, preventing dust, dirt, and debris from interfering with performance—ideal for rugged builds and outdoor use.
Videos with presentation are available on our official YouTube Channel.
⚠️ Warning: Using two of these gearboxes in series as boosters may generate excessive speed and friction, leading to high temperatures that can melt original LEGO elements. Use with caution in high-power applications!
Whether you’re designing fast-moving vehicles, robotic arms, or high-torque mechanical systems, this custom gearbox delivers superior efficiency and adaptability—unlocking new possibilities for advanced LEGO engineering
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