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Old Aug 05, 2015, 10:35 AM
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Need arm for a smartech servo - cross reference?

My servo arm cracked. Does anyone know what other brand arms would work on a Smartech servo? it has a splined plastic shaft. Thanks

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Old Aug 05, 2015, 01:26 PM
CG Bob is offline
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How many splines are on the shaft? Different brands of servos have different numbers of splines. Different size servos by the same maker may have different number of splines.

Futaba - 25 tooth is most common, also uses 15 and 21 tooth
Hitec - old standard was 24 tooth, new standard is 25 tooth, also uses 15 tooth

Do a search for "servo spline chart".
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Old Aug 05, 2015, 01:52 PM
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Awesome, good to know.
thanks
Tony
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