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Servo arm compatibility?


Old 10-01-2003, 10:01 AM
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Default Servo arm compatibility?

Hello, This is a real beginner's question, but I've got to ask it.

Can you swap servo arms across servos from different vendors? I tried to use on old Airtronics servo arm on a modern Futaba servo, and it didn't seem to fit. (It was hard to tell what was going on because I had already mounted the servo inside the plane.)

I looked at the two arms and the splined holes *appear* identical. Am I nuts are did these guys make their servo arms differ by the number of splines on their servo shafts?

Is this still true today? My Airtronics servo arms are about 10 yrs old.

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Old 10-01-2003, 10:25 AM
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Default RE: Servo arm compatibility?

For the most part none of the OEM stuff is compatible. Hitec is Hitec, Futaba is Futaba and JR is JR and Airtonics is Airtronics. Multiplex, JR and Airtonics have some stuff that will or appears to interchange.

Pay careful attention to this, as it is a possible problem. I have seen more than one model lost due to the incorrect servo arm used. What appears OK, is not...

Several of these OEM guys sale products relabeled, such as Tower Hobbies, Hobbico and others. These products splines are also manufacturer specific, for instance I believe Tower Hobbies stuff is made by Futaba.
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