HOOYIJ DS3240MG 40KG Digital Servo – Full Metal Gear, Waterproof, 180° Steering for 1/8 & 1/10 RC Cars

Overview

Meet the HOOYIJ DS3240MG 40KG digital servo, engineered for demanding RC builds where precision and reliability matter. The unit features a full metal stainless steel gear train and a CNC aluminum middle shell, delivering sturdy, repeatable motion with smooth operation. A waterproof sealing system helps protect internal components from dust and moisture, enabling you to push your setup in varied environments without compromising performance.

Designed for versatility, this servo works across a range of RC platforms while maintaining a compact form factor that fits tight spaces. The combination of robust hardware and careful tuning gives you a steady baseline for responsive steering and accurate positioning.

Key benefits

• 40 kg/cm stall torque at higher voltage for confident and precise steering control
• 180 degree rotation with a fast, smooth response for versatile maneuvering
• 4.8 to 6.8 volt power range offers flexibility with different battery setups
• All metal construction including stainless steel gears and a CNC aluminum shell for durability and reduced wear
• Waterproof seals provide protection against dust and moisture during use

Ideal applications

• 1/8 and 1/10 scale RC cars, crawlers, and buggy platforms
• RC airplanes, helicopters, fixed-wing models, quadcopters, and boats
• DIY robotics and other high-precision control projects requiring reliable servo performance

What’s in the box

• 2 x DS3240MG 40KG digital servos
• 2 x 25T adjustable metal servo arms
• 2 x accessory bags

For setup, note the servo is PWM controlled with a range of 500 to 2500 microseconds. The full 180 degree range is achieved when the pulse width sits toward the higher end. Please ensure your controller can reach the maximum pulse width for full range movement. This configuration provides strong, precise positioning that can enhance handling and steering feel, especially on demanding paths or terrain.

Care and setup tips

• Verify voltage supply stays within 4.8 to 6.8V to maintain torque and response
• Use compatible arms and mounting hardware to align with your chassis geometry
• Regularly inspect the waterproof seals and replace if signs of wear appear

Whether you are upgrading an existing model or building a new platform, the DS3240MG aims to deliver dependable performance from a compact, rugged package. This description reflects the product characteristics and known specifications, presented to help you assess suitability for your RC projects. Benefits described here are possibilities based on the listed features and do not guarantee outcomes in every setup.