V2 Version released! 19/06/2026 : Now better printing and better tolerance!

⚙️ Mini Inline 6 Engine Fidget Keychain

Gearheads, mechanics, and classic straight-six fans (BMW, 2JZ, RB26...), this one is for you!

Bring the most inherently balanced engine configuration straight to your pocket. This functional fidget keychain replicates the iconic movement of a real inline-6 engine in an ultra-compact form factor. Spin the crankshaft and watch the pistons move smoothly in sequence. It's the perfect mechanical anti-stress companion for car enthusiasts.

✨ Key Features

• Satisfying Fidget Action: Smooth mechanical movement designed to keep your hands busy at your desk or on the go.
• EDC-Friendly Size (Everyday Carry): Optimized footprint to fit comfortably on your keyring without adding unnecessary bulk.
• Durable Design: Tolerances and wall thicknesses have been carefully tuned to withstand daily pocket wear and tear.
• Bambu Lab Optimized: Tested and proven print profile for a clean, hassle-free printing experience.

🔧 Assembly Guide

• Step 1 (Pistons): Insert the pistons into the engine block cylinders.

  

• Step 2 (Crankshaft): Press the crankshaft into position through the block.

  

• Step 3 (Casing): Close the bottom casing (oil pan) and secure it permanently using a few drops of glue.

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Check also my 5 cylinder version for Audi fans! :