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How do you keep a gear on a shaft?

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Old 09-20-2003, 08:52 AM
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neal scoggin
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Default How do you keep a gear on a shaft?

I used some green fluid that came with the gear- I assume it was glue. But this (perfectly calm) morning after about 10 seconds of flight, I had a decoupled prop. Engine spun, but the prop just windmilled. How do I get my gear to stay on the shaft. I admit up front I'm a novice wandering in the bewilderness...

Thanks, Neal
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Old 09-20-2003, 09:42 AM
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red91sit
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Default RE: How do you keep a gear on a shaft?

lol i'm betting it was lubricant not glue, to fix it completely degrease the end shaft of the motor roughen it up a little with sandpaper and ca the gear on it. BTW what's that motor from?
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Old 09-20-2003, 03:55 PM
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neal scoggin
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Default RE: How do you keep a gear on a shaft?

Lubricant...that would be a problem...

The motor is for my Wingo parkFlyer.

What does "ca" mean?

Thanks for your help, Neal
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Old 09-21-2003, 09:23 PM
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Dr Kiwi
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Default RE: How do you keep a gear on a shaft?

That green fluid was, indeed, a form of glue [= Loctite]. However it appears you had insufficient interference fit for this glue to hold your pinion well enough. There are several varieties of genuine Loctite out there and some hold better than others. You can also use CA [cyanoacrylate = superglue]. Personally if you cannot get the pinion to stay on tight with one of these glues, I'd solder the pinion on. Roughen the shaft, use plenty of flux and put a veneer of solder on the shaft. Using a vice, press the pinion on (carefully aligned) while applying some heat to the pinion. You'll find this holds well, and if you ever need to remove the pinion to change ratios, a bit of heat will melt the solder enough for the pinion to be pulled off with a GWS Std gear puller.

Cheers, Phil
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Old 09-22-2003, 03:46 PM
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Default RE: How do you keep a gear on a shaft?

Great advice! I'll try the solder option!

Sincere thanks,
Neal
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