Acceptable Skydio2 brushless motor runout?

[jftman]

I acquired a motor from a crashed drone. It was in fact the RF same as my damaged motor location.

I salvaged the main shaft and put it on my watchmaker lathe to check runout.

It has + .045 inch and - .045 inch run out.
Is this is a bent shaft from the crash OR the machining job when created?
In a crash I suppose anything is possible.

I put the motor all back together, will this cause an issue fir the drone.
With four motors all having some runout I wonder what will be the effect overall?

 

[Sgee]

A +/- .045 inch runout (total .090 inch) is very significant for a drone motor, especially in a multirotor setup.

Option 1: Try Another Shaft

• If possible, find another motor with a good shaft.
• Check runout before installing.

Option 2: Try Straightening

• If you have a press, you can try carefully bending it back.
• Not recommended unless you have precision tools, as you may cause microfractures.

Option 3: Just Replace It

• If the drone is valuable, replacing the motor is the safest bet.
• Even a used replacement is better than risking a crash due to vibrations.