Servo Arm Metal Double Side 4" JR
$17.99
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Servo Arm Metal Double Side 4" JR
$17.99
Heavy Duty
Anodized Aluminum Construction
4-Inch Length
Ideal For Pull-Pull Setups
JR Spline
Precision Match For JR Servos
In Stock
Maximum Servo PrecisionEliminate Flex In Heavy Load Applications
The MPI 4" Double HD 4-40 Aluminum Servo Arm for JR Servos offers ultimate strength and zero-flex control for high-torque hobby applications. Machined from durable anodized aluminum, this double servo horn guarantees direct, positive control authority under extreme loads. Designed specifically for JR servos, it features pre-tapped 4-40 linkage holes for quick and secure installation.
Engineered For Giant ScaleHeavy Duty Performance For Demanding Control Linkages
When standard plastic servo arms flex or fail, the MPI 4" Double HD 4-40 Aluminum Servo Arm for JR Servos provides the rigid reliability required by serious RC enthusiasts. Designed by Maxx Products for giant scale RC aircraft, pull-pull rudder systems, and heavy-duty scale builds, this CNC-machined aluminum servo arm spans a full 4 inches across dual arms. Pre-threaded for standard 4-40 linkage hardware, it pairs seamlessly with high-torque JR brand servos to ensure smooth, precise, and slop-free control surface deflection every time you operate your model.
Technical SpecificationsDimensions And Compatibility Details
Part Type
Double HD Servo Arm
Material
CNC Anodized Aluminum
Spline Compatibility
JR Servo Spline
Overall Length
4.0 Inches
Hardware Thread
Tapped 4-40 Thread
Placement/Position
Output Shaft Mount
Compatible Vehicles
Giant Scale RC Aircraft and High-Torque RC Models
Weight
Standard Heavy Duty Metal Arm Weight
Performance FeaturesBuilt For Maximum Torque Handling
ConstructionCNC machined anodized aluminum for ultimate strength
Arm Configuration4-inch double arm layout for pull-pull systems
Spline MatchDirect fit for JR standard output splines
Thread PitchPre-tapped for 4-40 ball links and hardware
Flex ResistanceZero flex design under heavy servo load
DurabilityRust-resistant anodized finish
Frequently Asked QuestionsEverything you need to know
What servos fit the MPI 4" Double HD 4-40 Aluminum Servo Arm for JR Servos?
This servo arm is precisely engineered to fit standard output shaft splines on JR brand servos.
What hardware size is compatible with the MPI 4" Double HD 4-40 Aluminum Servo Arm for JR Servos?
The arm comes pre-tapped to accept standard 4-40 threaded ball links and control hardware for easy assembly.
What applications are best suited for the MPI 4" Double HD 4-40 Aluminum Servo Arm for JR Servos?
The 4-inch double arm design is ideal for giant scale RC airplane pull-pull rudder setups or dual linkage control systems that demand zero flex.