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Q: Does the pulse width need to vary beyond the range produced by a typical hobby receiver to get the full 270 degree rotation?

Yes,you're right! Generally speaking, the output pulse width of the remote control is in the range of 1000-2000,so the displayed angle is 135 degrees;To get the full 270 degrees rotation, the output pulse width should be 500-2500. :)

Q: Will this servo fit a traxxas rustler?

Yes,this rc servo can fit traxxas rustler

Q: What are the motor arm dimensions? What size are the holes in the arm? Are they clearance holes or threaded? Where are the wires located on the back?

Thanks for your question.Servo Arm is 25Tooth,they are threaded.More info please contact with seller.

Q: my esc has output voltage of 12v can work with 12v?

It's not ok cause the voltage is too high

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Description

⚙️ Power your projects with precision torque and waterproof reliability!

LIGHTWEIGHT COMPACT - At just 60g and 40x20x40.5mm, it fits seamlessly into any high-performance robotic build.
PRECISION ENGINEERING - Advanced linearity with precision potentiometers for ultra-smooth, low-noise operation.
ALL WEATHER DURABILITY - Waterproof rubber seals and full metal gears ensure peak performance rain or shine.
UNMATCHED TORQUE POWER - Delivers a commanding 21.5 kg/cm max torque for precision control under heavy loads.
VERSATILE ROTATION RANGE - 270° control angle with 360° free rotation when powered off—ideal for complex robotic joints.

The ANNIMOS 20KG RC Digital Servo features a high-torque 21.5 kg/cm output, waterproof full-metal gears, and a versatile 270° control angle. Engineered with CNC aluminum housing and precision potentiometers, it offers stable, low-noise performance ideal for robotics, mechanical arms, and remote control applications. Compact and lightweight, it’s the go-to servo for professionals and enthusiasts demanding durability and accuracy.

Specifications

Product Dimensions	4 x 4.05 x 2 cm; 59 g
Manufacturer recommended age	3 years and up
Item model number	DS3218
Educational Objective(s)	Learn about robotics and programming
Language:	English
Number of Game Players	1
Number of pieces	1
Assembly Required	No
Batteries Required?	No
Batteries included?	No
tech_spec_battery_description_toys	Alkaline or rechargeable batteries
Material Type(s)	Copper & Aluminum
Remote Control Included?	No
Radio Control Number of Bands	1
Colour	Red
ASIN	B076CNKQX4