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shaft diameter question

shaft diameter question


Old 01-14-2017, 09:16 AM
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Default shaft diameter question

First of all, I'm new to RC flight. Why are there so many different shaft diameters? I have a micro outrunner with a 2mm shaft diameter that I'm trying to find a prop saver adapter for. I see there is this that may fit:

but then they also make a slightly larger one?

Will the larger one also fit the smaller one since it's the screw that is holding onto the shaft?

I see the same thing repeating for 3mms. There's a 3mm one and then a 3.17mm one?? wth? why so many variations?
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