Lego plastic vs CaDA aluminum/copper vs MTP steel. Lego-compatible U-joints tested. Enjoy!

0:07 Max torque
02:04 Max angle
02:26 Length
02:49 Diameter
03:10 Axle connection
03:44 Close-up
04:05 Weight
04:18 Price (May 2025)
04:30 RESULTS SUMMARY

Tested parts:
Lego universal joint 3L 62520c01 https://www.bricklink.com/v2/catalog/catalogitem.page?P=62520c01
CaDA universal joint 3L JT6001 https://decadastore.com/products/cada-metal-universal-joint-3l-jt6001?ref=bec
MTP universal joint https://metal-technic-parts.com/products/technic-strong-metal-universal-joint-x-1

The aluminum gears, beams and axles used in the max torque test bench were also made by MTP (Metal Technic Parts)
https://metal-technic-parts.com/