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Servo Horn Adapters

Old 03-10-2012, 03:29 PM
  #1  
JohnP2
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Default Servo Horn Adapters

Today I started to install the Airtonics 94851 servo but the servo horns are completly different;, and Hyper 7 servo horn won't fit on the Airtronic's spindle. ;-(
So at this stage my choices are:

1. Find an adapter - I've seen this http://www.amainhobbies.com/product_...vy-Duty-Blackm but notice it does not say it is compatible with the Hyper 7. Anyone know of a sure-fire adapter.

2. Find another servo - My next choice would be the Hitec 5645MG. Can somene let me know who has one that it will DEFINITELY fit the OFNA Hyper 7 without any modifications?

Thanks!

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Old 03-11-2012, 08:19 AM
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Default RE: Servo Horn Adapters

That servo horn kit should work, they include adapters for all the major brands.

JR/Spektrum/Airtronics - 23 splines
Hitec - 24 splines
Futaba - 25 splines
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Old 03-11-2012, 08:30 AM
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Default RE: Servo Horn Adapters


ORIGINAL: proanti1

That servo horn kit should work, they include adapters for all the major brands.

JR/Spektrum/Airtronics - 23 splines
Hitec - 24 splines
Futaba - 25 splines
I agree, I've never seen one that could not at least be adapted. Sometimes I've had to trim a horn/adapter to fit a particular application though. Have you tried calling the Airtronics and asking them which one to use or how to make it work in your vehicle?
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Old 03-11-2012, 08:58 AM
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Default RE: Servo Horn Adapters

Thanks. Forgive me, however, as I am a bit confused.

Are you both stating that the servo horn on my Hyper 7 should fit onto the splines of the Airtronics servo? The problem appears that the servo horn "hole" (not sure what it's called) is a bit smaller than the splines, so it does appear to fit. Honestly, I did not force the horn down all too strongly on the servo, but can try again.

Or...are you saying I need the adapters (http://www.amainhobbies.com/product_info.php/cPath/1_25_1461_635/products_id/13634/n/OFNA-Servo-Horn-Heavy-Duty-Blackm )

Thanks!
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Old 03-11-2012, 12:04 PM
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Default RE: Servo Horn Adapters

Are you trying to use the horn that came with the car, the one that was on the stock servo? If so, that may not be possible. If the stock one is not fitting then I'd use one of the ones that come with the servo and adapt it to fit the situation. I believe that the new servo comes with a wheel and a 6 arm horn?? I'd think that the 6 arm one could be adapted to fit. Maybe post photos of what's in the car and the new horns and we can give suggestions.
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Old 03-11-2012, 12:13 PM
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Default RE: Servo Horn Adapters


ORIGINAL: JohnP2

Thanks. Forgive me, however, as I am a bit confused.

Are you both stating that the servo horn on my Hyper 7 should fit onto the splines of the Airtronics servo? The problem appears that the servo horn "hole" (not sure what it's called) is a bit smaller than the splines, so it does appear to fit. Honestly, I did not force the horn down all too strongly on the servo, but can try again.

Or...are you saying I need the adapters (http://www.amainhobbies.com/product_info.php/cPath/1_25_1461_635/products_id/13634/n/OFNA-Servo-Horn-Heavy-Duty-Blackm )

Thanks!
Just to make sure, you are aware that different brands use different splines, right?

23 spline: KO, JR, Airtronics/Sanwa
24 spline: Hitec
25 spline: Futaba but not micro.
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Old 03-11-2012, 12:39 PM
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Default RE: Servo Horn Adapters


ORIGINAL: DaveG55

Are you trying to use the horn that came with the car, the one that was on the stock servo? If so, that may not be possible. If the stock one is not fitting then I'd use one of the ones that come with the servo and adapt it to fit the situation. I believe that the new servo comes with a wheel and a 6 arm horn?? I'd think that the 6 arm one could be adapted to fit. Maybe post photos of what's in the car and the new horns and we can give suggestions.
Yes, I am trying to use the stock horn (single arm).

The Airtronics only came with a wheel. I tried to put the stock servo arm onto the wheel, but it won't fit.
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Old 03-11-2012, 02:56 PM
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Default RE: Servo Horn Adapters

You will need to order that kit, or stop by your local hobby shop and pick up a pack of Airtronics servo horns.
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Old 03-11-2012, 05:23 PM
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Default RE: Servo Horn Adapters

Well, you might be able to make the wheel work. It's a bit hard to tell from the pics but the offset (center of wheel to center of hole used) looks close to the same. If it's pretty close then try the wheel. If not then, yeah, as proanti said, pick up a set of airtronics horns.
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Old 03-12-2012, 02:32 PM
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Default RE: Servo Horn Adapters

Thanks guys. At this point I think I will take it to my LHS (it's been a few weeks - and I'm sure they miss me)....;-)
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Old 03-12-2012, 02:58 PM
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Default RE: Servo Horn Adapters

That wheel should work perfectly fromt he looks of it....
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Old 03-12-2012, 06:39 PM
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Default RE: Servo Horn Adapters


ORIGINAL: cummins driver

That wheel should work perfectly fromt he looks of it....
The problem is that the servo arm does not fit anywhere on the wheel. Consequently, I'm at a loss on how the wheel would work.

Thanks
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Old 03-12-2012, 07:07 PM
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Default RE: Servo Horn Adapters

Unscrew the turnbucle from the stock servo horn and screw it onto the round one.
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Old 03-12-2012, 07:11 PM
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Default RE: Servo Horn Adapters

You dont need to mount the arm on the wheel. All you have to do is take the bolt out of the arm that holds it to the steering linkage and remove the arm all together, then put the bolt in one of the holes on the wheel that is the farthest to the outside, and put it all back together. Should work just fine I believe It looks different but functions exactly the same...
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Old 03-12-2012, 07:18 PM
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Default RE: Servo Horn Adapters

type in double servo horn airtronics in any search engine and you're home.

Here is an example of the horns available to you. Doubt your LHS will have such a selection. Just pick one and you'll be running in no time.

http://www.amainhobbies.com/advanced...orn+airtronics
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