Originally Posted by
abgd
The hardest parts of a drone are the motor shafts which will be a few inches long and perhaps 5-10mm diameter - they will be made of hardened steel.
For "a few inches" read "under two inches in all but the very largest examples".
For "5-10mm dia" read 3-5mm dia in all but the very largest examples.
For "hardened steel" read "mild steel in all but the very few and rather expensive examples".
All of this information is easily discoverable with a few seconds of research, yet the myths and postulations prevail <sigh>
PDR