Need help determining motor shaft size/replacement - RC Groups
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Jan 17, 2013, 10:16 PM
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Need help determining motor shaft size/replacement


I recently crashed my Flyzone Beaver and as a result the shaft is slightly bent. I found a motor adapter replacement part (which was also bent), but nowhere can I find just the shaft to order. The specs of the motor are below. Can someone please help me figure out where/how/what I can get for a shaft replacement for this specific motor? Thank you all in advance.
Last edited by Mavs424; Jan 17, 2013 at 10:45 PM.
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Jan 18, 2013, 05:15 AM
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stemo99's Avatar
I have never seen 4.1 mm shafts until now, but 4mm are readily available. The difference in diameter is .0025 in. which may not matter at all. For length, just cut to whatever size you need, should work. My go to guy for parts is:
Jan 18, 2013, 06:00 AM
222 km/hr Parkjet flyer
solentlife's Avatar
I too have not seen 4.1mm shafts listed before this ... plenty of excellent 4.0mm at ... but no 4.1 - which for them is surprising as they cater for just about all ...

That 0.1mm is significant though ... try running a 3mm in a 3.17mm and yoú'll soon see ...

I would go back to Towerhobbies and quiz them for the replacement shaft ... If that fails - then try and find a Metalworks that maybe can run up a shaft for you ? Hardened steel of course.

There is another thought ... quite a few motors - the shaft IN the motor is different size to the EXTERNAL part of shaft ... i would be inclined to withdraw the old shaft ... get a micro and measure the INTERNAL diameter part ... it may be standard size ... then that's what you go for and ignore the external size by getting suitable adaptor for the new.

Jan 18, 2013, 10:08 AM
Registered User
LesUyeda's Avatar
It would appear to be, by the specs, "5/32", that the shaft is not metric at all. I would get some 5/32 drill rod, and make a new shaft out of that.

Jan 20, 2013, 06:55 AM
222 km/hr Parkjet flyer
solentlife's Avatar
Or ... if me ... get a similar motor capable of flying this model with standard metric available anywhere shafts ... for what is likely $20 max ... you could solve the issue once and for all with a more easily serviced solution.
You could in fact improve your model by adding a litttle to the power capability if wanted ...


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