DYS Waterproof 45kg 8.4V Coreless Digital Servo (IP67)

A standard-size high-voltage digital servo from DYS with a coreless motor, full metal gear train and IP67 sealing, built for heavy steering, robotics and mechanisms exposed to water, mud and dust. It runs directly from a 2S LiPo (8.4 V fully charged) or a 6-8.4 V BEC, and comes in 180° and 270° travel versions.

Key features

• Torque rises with voltage: 35 kg-cm at 6.0 V, 41 kg-cm at 7.4 V and 45 kg-cm at 8.4 V.
• Coreless motor: low rotor inertia for fast, smooth response, down to 0.09 s/60° at 8.4 V.
• Metal drivetrain: full metal gears on two ball bearings inside an aluminium case.
• IP67 sealing: dust-tight and protected against temporary immersion, so crawlers, boats and outdoor rigs can run it in the wet.
• Wide pulse range: standard PWM control across 500-2500 µs.

Specifications

• Operating voltage: 6.0-8.4 V
• Stall torque: 35 kg-cm (6.0 V) / 41 kg-cm (7.4 V) / 45 kg-cm (8.4 V)
• Speed: 0.13 s/60° (6.0 V) / 0.10 s/60° (7.4 V) / 0.09 s/60° (8.4 V)
• Running current: 3.5 A (6.0 V) / 3.8 A (7.4 V) / 4.2 A (8.4 V)
• Idle current: 300 mA (6.0 V) / 320 mA (7.4 V) / 350 mA (8.4 V)
• Travel: 180° or 270° (choose version)
• Control: PWM, 500-2500 µs
• Motor: Coreless
• Gears / bearings: Full metal / 2 ball bearings
• Case: Aluminium
• Dimensions: 40 x 20 x 40.5 mm
• Weight: 78 g
• Lead: 300 mm, 22AWG (brown negative, red positive, yellow signal)
• Operating temperature: -20 to +60 °C
• Protection: IP67

Plan the power supply: under load the servo draws up to 4.2 A at 8.4 V, so feed it from a BEC or 2S pack with headroom above that rather than through a receiver's power rail. Choose 180° for steering and control linkages, and 270° for robot joints and mechanisms that need a longer throw.