I'm not sure where to put this, but I'm wondering if anyone has tried taking apart a servo and using its spline as a heat set insert for custom 3D printed servo horns. I have a couple of MG90s' and I'm thinking of sacrificing one to try this. I'll be using a soldering iron to push it into a hole in the part and then take it out once it cools.
USD3.00 for 1500 insert kit. https://www.aliexpress.us/item/3256807263527388.html
USD2.00 for one MG90. https://www.aliexpress.us/item/3256801435475718.html
That would be proof "it did not work."
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Well I just tried it and it worked. What I meant was sacrificing a servo spline to make a custom servo horn that way I wouldn't need to buy custom servo horns online. I need to be able to remove it in order to put it on a different servo. If anyone sees this later I used 300 degrees Celcius with PLA and pressed the spline in from the top of the gear it was attached to. I'm guessing if you just have the spline you should use 225 degrees.
Put a hole in the "horn" to screw into the servo spline. M2/M3 screws are cheaper than the insert kit. You made a slushie by shaking the blender.
Might want to take it out before then since plastic always shrinks when it cools. But great way to re-use stuff!
My philosophy is that everything contains some raw materiel for a future project! Recycled several thousand dollars of various metals when I closed my contract assembly business.