How much torque can a lego axle handle? from to this question, it seems that the gears are stronger than the axles, which begs the question of how strong are the axles? if you connect one of the stronger motors, such as say the buggy motor:



which according to philohome can produce 14N*cm of torque with an adequate power supply, is this enough as-is to break axles? what if it's geared down 1:2? 1:4? (such that it turns slower with more force), at what point do you risk breaking axles? (or more likely, at which point will they start to bend and lose strength)
In this forum thread I have found the following tidbits:


"We all know that XL motors can twist axles to their breaking point" This means 40 Ncm, according to Philo.
"If you're looking to get max torsional stiffness, then stacked 2L axles + connectors would definitely be much stiffer in torsion than a single long axle."
Axles can twist without breaking in two


Besides these, I couldn't find an exact number.