DFRobot
45KG Torque Coreless Waterproof Servo
A high-torque coreless waterproof servo delivering up to 45 kg·cm of stall torque at 8.4V. The all-metal gear train and aluminium shell provide excellent dur...
A high-torque coreless waterproof servo delivering up to 45 kg·cm of stall torque at 8.4V. The all-metal gear train and aluminium shell provide excellent 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 coreless motor with MOS driver offers smooth, low-jitter operation with reduced noise compared to standard brushed servos. 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
- Coreless Motor – Smooth, responsive operation with low jitter and minimal noise
- 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
- 2 µs Dead Zone – Responsive to small signal changes
- Dual Ball Bearings – Smooth output shaft rotation under load
- 600,000+ 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: 300 mA at 6V / 450 mA at 8.4V
- Stall Current: 3100 mA at 6V / 3900 mA at 8.4V
- Pulse Width Range: 500–2500 µs
- Rotation Angle: 180°
- Dead Zone: 2 µs
- Motor Type: Coreless (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: >600,000 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 Coreless 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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