Servo horn for using Futaba servos with the SES?

Lynxmotion Servo Erector Set
1

I wondering if there was a servo horn with the 25 tooth pattern used by Futaba servos that could also be used with Lynx parts. I happen to have a bunch of S3150s, S3010s, and S3003s. While I now know I’d never want to use these in load bearing applications (i.e. for legs) since they don’t provide much torque, it would still be nice to use them in non-bearing applications like for a camera pan and tilt, to provide rotation for sensors, etc.

Alternatively to a known servo horn, if somebody knows how to machine servo horns, I might be able to make them myself down in the University machine shop. Right now I’m leaning toward them being cast or punched with a much more heavy-duty punching machine than I have access to. In either case, I probably couldn’t make one easily. I might be able to make a hybrid mold with a Futaba servo horn for the center and a Lynx horn for the rest and then cast it out of aluminum as we can cast small parts in the shop but it probably won’t be worth my time due to the pains involved with casting, especially for something with some much critical detail which I would want in quantity.

However, the alternative of shelling out $400+ to replace them all with 5475s when I have a pile of working (mostly digital) servos doesn’t sound that much better.

2

The small black round servo horn provided by Futaba will work with the SES parts. You just rotate it until you see the holes line up, and use them. The only way to make aluminum servo horns is with a CNC lathe. The teeth for the spline are made in a separate operation.

3

Thanks. I feel like a total idiot. :blush: I had tried to line them up, but think I started by attaching the center hole of one of the groups of three holes in the Futaba horns to a bracket, which results in it being impossible to match up any other holes. If I attach it to the first hole, and twist all four holes do line up.

4

:smiley: Yep, hard to explain, easy to do… :smiley: