Testing Lego-compatible Axles (max torque, durability, friction, etc)

Lego plastic vs carbon fiber vs aluminium vs stainless steel. Lego-compatible axles tested comprehensively. Enjoy! 0:09 Max torque test 4:15 Durability test 5:56 Friction test 1: car and a slope 6:54 Friction test 2: rotating plate 7:51 Noise test 8:44 Insertion test into Lego parts 9:44 Close-up images 10:21 Weight & density comparison 10:53 Price comparison (Nov 2023) 11:14 RESULTS SUMMARY Carbon fiber axles are made by CaDA Bricks. https://decadastore.com/products/cada-carbon-fiber-axles-jt7001?ref=bec Aluminium axles are made by Metal Technic Parts a.k.a. Dark Ice Designs. They also make the metal gears and beams that were used in the max torque test bench. https://metal-technic-parts.com/collections/axles The stainless steel axles were originally bought from Brick Machine Shop on BrickLink (now obsolete). As of Jan 2026, steel axles are available from MTP. https://metal-technic-parts.com/products/stainless-steel-metal-axle-compatible-with-lego-technic