DYS Waterproof 20kg 6V Digital Servo, Full Metal Gear (IP65)

This 20kg-class waterproof digital servo pairs a full metal gear train with an IP65-sealed case, for RC car and crawler steering, large aircraft control surfaces, payload releases and robotics joints that see dust and splashes. It runs on 4.8–6.8 V, so a standard 6 V receiver or BEC rail powers it directly.

Key features

• 21 kg·cm stall torque at 5 V, rising to 23.5 kg·cm at 6.8 V
• 0.12 s/60° at 5 V and 0.10 s/60° at 6.8 V
• Full metal gears on twin ball bearings for durability under steering and surface loads
• IP65 protection against dust and water spray; not rated for submersion
• Available in 180° and 270° travel versions; accepts 50–330 Hz PWM

Specifications

• Operating voltage: 4.8–6.8 V
• Stall torque: 21 kg·cm at 5 V, 23.5 kg·cm at 6.8 V
• Speed: 0.12 s/60° at 5 V, 0.10 s/60° at 6.8 V
• Travel: 180° or 270° (by variant)
• PWM frequency: 50–330 Hz
• Gears: Full metal
• Bearings: 2 ball bearings
• Waterproofing: IP65
• Dimensions: 40 x 20 x 40.5 mm
• Weight: 60 g
• Lead length: 300 mm
• Operating temperature: -20 to 70 °C

Most RC steering and control-surface setups use the 180° version; the 270° version suits mechanisms that need extra throw, such as robot arms. Keep the supply at or below 6.8 V: a 2S LiPo is too high for this servo.