DFRobot
45KG Torque Brushless Waterproof Servo
A high-torque brushless waterproof servo delivering up to 45 kg·cm of stall torque at 8.4V. The all-metal gear train and aluminium shell provide exceptional ...
A high-torque brushless waterproof servo delivering up to 45 kg·cm of stall torque at 8.4V. The all-metal gear train and aluminium shell provide exceptional durability, while IP67-rated waterproofing — achieved through laminated circuit boards, waterproof gaskets, and breathable composite sealing — makes it suitable for outdoor and marine robotics applications.
The brushless motor with MOS driver produces virtually silent operation with minimal jitter under load, making it an excellent choice for multi-joint robot projects. The servo supports 180° rotation within a 500–2500 µs pulse range and features an internal pulse lock function that holds position with a single PPM pulse, reducing processor overhead and extending service life.
Key Features
- 45 kg·cm Stall Torque – At 8.4V (35 kg·cm at 6V)
- IP67 Waterproof – Sealed circuit board with breathable composite waterproof coating
- Brushless Motor – Quiet, low-jitter operation with MOS driver
- All-Metal Gears – Durable metal gear train for high-load applications
- Aluminium Shell – Strong, wear-resistant housing with good heat dissipation
- 180° Rotation – Precise angle control within 500–2500 µs pulse range
- No Internal Limit – Can physically rotate 360° without jamming
- Pulse Lock Function – Holds position with a single PPM pulse, reducing controller workload
- 1 µs Dead Zone – Highly responsive to small signal changes
- Dual Ball Bearings – Smooth output shaft rotation under load
- 1 Million+ Cycle Lifespan – Designed for long-term reliability
Specifications
- Control System: PWM (digital signal processing)
- Working Voltage: 6.0–8.4V
- Max Torque: 35 kg·cm at 6V / 45 kg·cm at 8.4V
- No-Load Speed: 0.12 sec/60° at 6V / 0.11 sec/60° at 8.4V
- No-Load Current: 450 mA at 6V / 600 mA at 8.4V
- Stall Current: 5000 mA at 6V / 7000 mA at 8.4V
- Pulse Width Range: 500–2500 µs
- Rotation Angle: 180°
- Dead Zone: 1 µs
- Motor Type: Brushless (MOS driver)
- Bearings: 2× ball bearings
- Gear Material: All metal
- Shell Material: Aluminium
- Waterproof Rating: IP67
- Operating Temperature: −20°C to +60°C
- Service Life: >1,000,000 cycles
- Dimensions: 40 × 20 × 40.5 mm
Ideal For
- Multi-joint walking robots and robotic arms
- RC boats and marine robotics
- Outdoor and all-weather robot projects
- DIY robot cars and tracked vehicles
- Professional development and research applications
Package Contents
- 1× 45 kg Torque Brushless Waterproof Servo
- 1× Servo horn and screw pack
Jargon buster
Plain-language definitions for the technical terms used above.
- IP67
- An ingress protection rating meaning the enclosure is dust-tight and can survive temporary immersion in water under specified test conditions. This matters when choosing a sensor for outdoor, wet, or wash-down environments.
- kg·cm
- A torque unit often used for hobby servos, meaning how many kilograms of force the servo can hold at a 1 cm arm length. A higher kg·cm rating means the servo can move or hold heavier loads, but power supply current needs may also increase.
- ppm
- ppm means parts per million, a common way to express very small gas concentrations in air. For CO₂ sensors, the ppm range tells you what levels the sensor can measure, such as normal indoor air through to poorly ventilated spaces.
- Pulse width range
- The span of control pulse lengths a servo understands, usually measured in microseconds. Matching this range in your code affects how far the servo moves and helps avoid commanding positions outside its intended travel.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- servo
- A servo is a motor with built-in position control, usually told to move to a specific angle by a control signal. It matters when you need repeatable movement, such as steering, arms, flaps, or linkages, rather than continuous spinning.
- Stall torque
- The maximum twisting force a servo can produce when its output is held still and cannot move. It helps you judge whether the servo is strong enough for a robot joint, steering linkage, or other load.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
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Brands
Robotics & Motion
Supplier page — dfrobot.com
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