DYS Waterproof 25kg 8.4V Digital Servo, Full Metal Gear (IP67)

A 25kg high-voltage digital servo with full metal gears, a CNC aluminium case and IP67 sealing, for crawler and truck steering, robotic arms, industrial actuators and drone mechanisms that face rain, mud or brief immersion. It is rated for 6.0–8.4 V, so it runs directly from a 2S LiPo or an HV BEC.

Key features

• 25 kg·cm at 8.4 V, about 22–24 kg·cm at 7.4 V and 18–20 kg·cm at 6 V
• CNC aluminium case adds rigidity and helps dissipate heat during continuous work
• IP67 protection: dust-tight and survives temporary immersion
• MOS-driven iron-core motor with a 1 µs dead band for fine positioning
• Dual ball bearings and full metal gears, rated beyond 80,000 no-load cycles

Specifications

• Operating voltage: 6.0–8.4 V
• Torque: approx. 18–20 kg·cm at 6 V, 22–24 kg·cm at 7.4 V, 25 kg·cm at 8.4 V
• Speed: approx. 0.16 s/60° at 6 V, 0.14 s/60° at 8.4 V
• Idle current: 270 mA at 6 V, 320 mA at 7.4 V, 350 mA at 8.4 V
• Running current: 2.8 A at 7.4 V, 3.2 A at 8.4 V
• Pulse range: 500–2500 µs
• Dead band: 1 µs
• Waterproofing: IP67
• Dimensions: 40 x 20 x 40 mm
• Weight: 78 g
• Lead: 300 mm, 22AWG (brown negative, red positive, yellow signal)
• Operating temperature: -20 to 60 °C

Budget for the current: at 8.4 V it draws over 3 A when working, so feed it from a BEC sized for several amps rather than a receiver's onboard regulator.