Actobotics Futaba Servo Shaft Hub (1/2")

Works well and delivery was smooth and quick-

When no other horn allows for strong 6-32 screws and enough of a shaft length for a pillow block I always use this one from Actobotics. All shaft loads can be loaded on the frame instead of the servo motor itself making sure your project lasts. It's very high quality and actually worth the high price when compared to other products. The horn spline is sharp and fits nicely without slipping.

I use these hubs to convert a Bruder D5 dozer from a child's push toy, to an RC machine! With continuous servos acting as the motors, these hubs make the conversion a breeze.