Futaba FU1K27101 Type-U Six-Arm Serration Servo Horn Set 3pcs for S9152/S9153 (W/O Screw)  [FU1K27101]

Futaba FU1K27101 Type-U Six-Arm Horn Overview

This serration servo horn is built for Futaba S9152 and S9153 servos and is supplied as a pack of three pieces without mounting screws. The Type-U six-arm arrangement offers multiple mounting radii, while the serration interface locates on the servo spline to minimise slip under load.

Fitting is straightforward: fully seat the horn onto the servo spline ensuring the serrations engage, select the arm that gives the desired travel and leverage, then fasten using an appropriate screw sourced from your servo kit or hardware stash. Check spline alignment and confirm free movement through the full steering arc before final tightening.

Use the six arm positions to tune steering response without altering servo endpoints; a shorter arm lowers throw and increases effective torque at the linkage, while a longer arm increases throw and reduces torque. This horn serves as a direct mechanical option for tuning steering geometry and linkage behavior on RC cars and related models.