How to find the right RC Servo Arms AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in RC Servo Arms
- Spline count and shaft diameter
- Match the servo's output spline, usually 25T, 24T or 23T on standard servos A near-miss spline will appear to fit, then strip under load.
- Clamping vs press-fit
- Use a clamping (pinch-bolt) aluminum horn for steering on 1/10 scale and larger Press-fit horns loosen and wallow out under high-torque steering loads.
- Arm length and hole spacing
- A longer arm gives more throw and less force at the linkage; match the original length unless you are re-tuning steering Arm length changes steering throw and the load on the servo.
- Servo saver vs solid horn
- Keep a servo saver on bashers; use solid horns on crawlers and racers with strong servos A servo saver protects the gears from impacts but adds slop.
Brands that matter
- Savox: Aluminum horns for its 25T servos.
- Hitec: Horns for its 24T standard and smaller servos.
- Hot Racing: Aluminum clamping horns sold by spline type.
- Traxxas: Servo horns and savers for its vehicles.
What to avoid
- Horns labelled only 'Futaba' or 'Hitec' without the tooth count
- Plastic horns on high-torque steering servos