---
product_id: 247437992
title: "SunFounder 20KG Servo Motor Waterproof High Torque Servo, SF3218MG Metal Gear Digital Servo, Aluminium Case, Control Angle 270° for RC Robot Cars"
brand: "sunfounder"
price: "2415448₫"
currency: VND
in_stock: true
url: https://www.desertcart.vn/products/247437992-sunfounder-20kg-servo-motor-waterproof-high-torque-servo-sf3218mg-metal
store_origin: VN
region: Vietnam
---

# Waterproof 270° rotation 20KG high torque power Durable CNC aluminum case SunFounder 20KG Servo Motor Waterproof High Torque Servo, SF3218MG Metal Gear Digital Servo, Aluminium Case, Control Angle 270° for RC Robot Cars

**Brand:** sunfounder
**Price:** 2415448₫
**Availability:** ✅ In Stock

## Summary

> ⚙️ Power your projects with precision and durability — don’t get left behind!

## Quick Answers

- **What is this?** SunFounder 20KG Servo Motor Waterproof High Torque Servo, SF3218MG Metal Gear Digital Servo, Aluminium Case, Control Angle 270° for RC Robot Cars by sunfounder
- **How much does it cost?** 2415448₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/247437992-sunfounder-20kg-servo-motor-waterproof-high-torque-servo-sf3218mg-metal)

## Best For

- sunfounder enthusiasts

## Why This Product

- Trusted sunfounder brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Cool Under Pressure:** CNC aluminum alloy casing dissipates heat efficiently, keeping your servo performance peak.
- • **Compact & Lightweight:** Sleek 40x20.5x40.5mm design weighing just 56g fits perfectly in your next-gen RC or robotics project.
- • **Precision Engineering:** Dual ball bearings and advanced potentiometer ensure razor-sharp accuracy and smooth operation.
- • **Unmatched Torque Power:** Delivers a commanding 20.5-22.8kg·cm torque for precision control under heavy loads.
- • **Seamless 270° Rotation:** Experience fluid, full-range motion with waterproof protection for all-weather reliability.

## Overview

The SunFounder SF3218MG is a high-torque 20KG digital servo motor featuring a robust metal gear system and waterproof design. It offers precise 270° control with dual ball bearings and an advanced potentiometer for superior accuracy. Encased in CNC aluminum for optimal heat dissipation, this compact and lightweight servo is ideal for demanding RC robot cars and robotics applications.

## Description

SunFounder 20KG Servo Motor Waterproof High Torque Servo, SF3218MG Metal Gear Digital Servo, Aluminium Case, Control Angle 270° for RC Robot Cars

## Features

- Large Torque - 20KG Servo Motor 20.5kg·cm (284.7oz·in) -22.8kg·cm (316.63oz·in)
- High Rotation Support Waterproof- 270 degree rotation. Well controlled from 0 to 270 degrees, and support waterproof.
- High Precision - Using dual ball bearings design and advanced potentiometer to make sure the high linearity and accuracy of the servo
- Good Heat Dissipation - Make of CNC aluminium alloy case in order to cool the servo motor when it is working
- Dimensions - 1.58*0.79*1.60 ininch (40.0*20.5*40.5mm);Weight: 56g (1.98oz)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Educational Objective(s) | Discover, experiment |
| Model Number | 20KG Servo Motor |
| Assembly Required | No |
| Batteries Required | No |
| Batteries Included | No |
| Material Type(s) | Metal |
| Remote Control Included? | No |
| Radio Control Number of Bands | 1 |
| Colour | 20kgservo |
| Product Dimensions | 4.04 x 1.88 x 4.57 cm; 74.84 g |
| Item model number | 20KG Servo Motor |
| Manufacturer recommended age | 14 years and up |
| Manufacturer | SunFounder |
| Country of Origin | USA |
| Item Weight | 74.7 g |

## Images

![SunFounder 20KG Servo Motor Waterproof High Torque Servo, SF3218MG Metal Gear Digital Servo, Aluminium Case, Control Angle 270° for RC Robot Cars - Image 1](https://m.media-amazon.com/images/I/61xzlJ+16FL.jpg)
![SunFounder 20KG Servo Motor Waterproof High Torque Servo, SF3218MG Metal Gear Digital Servo, Aluminium Case, Control Angle 270° for RC Robot Cars - Image 2](https://m.media-amazon.com/images/I/618v3iH-vLL.jpg)
![SunFounder 20KG Servo Motor Waterproof High Torque Servo, SF3218MG Metal Gear Digital Servo, Aluminium Case, Control Angle 270° for RC Robot Cars - Image 3](https://m.media-amazon.com/images/I/61C1ZJ6c4KL.jpg)
![SunFounder 20KG Servo Motor Waterproof High Torque Servo, SF3218MG Metal Gear Digital Servo, Aluminium Case, Control Angle 270° for RC Robot Cars - Image 4](https://m.media-amazon.com/images/I/61VyRH9GlxL.jpg)
![SunFounder 20KG Servo Motor Waterproof High Torque Servo, SF3218MG Metal Gear Digital Servo, Aluminium Case, Control Angle 270° for RC Robot Cars - Image 5](https://m.media-amazon.com/images/I/71EaaeP0lbL.jpg)

## Available Options

This product comes in different **Colour** options.

## Questions & Answers

**Q: Will this work with a 1/18 scale Elroy’s A959?**
A: If it fits it should work

**Q: Anyone have feedback on the 330 high torque servo with a traxxas trx4?**
A: This servo is garbage. Internal gears stripped on first use.

**Q: Why does it make a humming noise at the rest (idle) position?**
A: Check your trim(?). When I center my trim in the transmitter the humming went away I'm a truck I've when I've noticed it.  
I wondered if the servo was trying to hold a position but never finished thinking on why

**Q: What frequency should I use to control it?**
A: You can use 330hz to control it, thanks.

## Frequently Bought Together

- SUNFOUNDER 20 kg Servo Motor High Torque Servo, TD8120MG Metal Gear Digital Servo, Aluminium Case, 270° Angle Control for RC Robot Cars
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**Shop now:** [https://www.desertcart.vn/products/247437992-sunfounder-20kg-servo-motor-waterproof-high-torque-servo-sf3218mg-metal](https://www.desertcart.vn/products/247437992-sunfounder-20kg-servo-motor-waterproof-high-torque-servo-sf3218mg-metal)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-01-23*