• FEETECH HL-3620 Servo, FEETECH HLS3620/TTL is a 7.4V, 20kg.cm, 360° dual-shaft servo motor delivering constant force, ideal for robotics and automation applications requiring precise, continuous rotation control.
  • FEETECH HL-3620 Servo, FEETECH HLS3620/TTL is a 7.4V, 20kg.cm, 360° dual-shaft servo motor featuring a 25T spline, ideal for robotics and high-torque applications.
  • FEETECH HL-3620 Servo, FEETECH HL3620/TTL is a 7.4V, 20kg.cm, 360° dual-shaft constant force servo motor ideal for robotics and automation applications requiring continuous rotation and high torque.
  • FEETECH HL-3620 Servo, FEETECH HL-3620 is a 7.4V, 20kg.cm servo with 360° rotation, double shaft, constant force, serial PID control, and 25T spline for reliable, precise performance.
  • FEETECH HL-3620 Servo, FEETECH 20KG high-torque coreless motor servo, 360°/4095 resolution, TTL-controlled, 7.4V, 25T spline, ideal for robotics and precise motion control applications.
  • FEETECH HL-3620 Servo, The FEETECH servo motor features a 7.4V power supply, 20 kg.cm torque, double-shaft design, and serial PID controller for constant force and 360° rotation.
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FEETECH HL-3620 Servo Motor, 7.4V 20kg.cm 360° Double Shaft Constant Force, Serial PID, 25T spline

FEETECH HL-3620 Servo Motor, 7.4V 20kg.cm 360° Double Shaft Constant Force, Serial PID, 25T spline

Feetech

$52.00 USD
$52.00 USD
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Overview

The FEETECH HL-3620 Servo Motor is a smart, double-shaft constant force servo designed for precise 0–360° position control and advanced torque regulation. It operates on 6V–8.4V and is available in two variants (ST-3620-C001 and ST-3620-C002), featuring copper gears, ball bearings, and an aluminium case. Control and feedback are provided via half duplex asynchronous serial communication with PID control, making the FEETECH HL-3620 suitable for robotics and automation applications requiring stable speed, current, and torque characteristics.

Applications

  • Humanoid Robots
  • Robotic Arms
  • Exoskeletons
  • Quadruped Robots
  • AGV Vehicles
  • ARU Robots

Key Features

  • 7.4V 20kg.cm 360° double-shaft constant force servo (C001/C002)
  • No mechanical limit angle; controllable 0–360° position (0–4096) with 0.088° resolution
  • Operating modes: Angle Servo (default), Constant Speed, Constant Current
  • Constant force output: set target torque; servo maintains the specified torque
  • Feedback telemetry: Load, Position, Speed, Input Voltage, Current, Temperature
  • Half duplex asynchronous serial communication, PID control, ID range 0–253
  • Copper gear train, ball bearings, aluminium case; 25T/OD5.9mm horn spline
  • Gear ratio 1/275; rated input 6V–8.4V; peak stall torque 25.5kg.cm@8.4V

Specifications

Parameter ST-3620-C001 ST-3620-C002
Product Name 7.4V 20kg.cm 360° Double Shaft Constant Force Servo 7.4V 20kg.cm 360° Double Shaft Constant Force Servo
Storage Temperature Range -30℃～80℃ -30℃～80℃
Operating Temperature Range -20℃～60℃ -20℃～60℃
Temperature Range 25℃ ±5℃ 25℃ ±5℃
Humidity Range 65%±10% 65%±10%<
Size A：40.2mm B：20.2mm C：40mm A：40.2mm B：20.7mm C：40.8mm
Weight 61.7± 1g 62.1± 1g
Gear type Copper Copper
Limit angle NO limit NO limit
Bearing Ball bearings Ball bearings
Horn gear spline 25T/OD5.9mm 25T/OD5.9mm
Gear Ratio 1/275 1/275
The rocker phantom 0° 0°
Case Aluminium Aluminium
Connector wire 15CM 15CM
Motor Core Motor Core Motor
Rated Input Voltage 6V-8.4V 6V-8.4V
No load speed 0.135sec/60°(74RPM)@8.4V 0.135sec/60°(74RPM)@8.4V
Runnig current(at no load) 880mA@8.4V 280mA@8.4V
Peak stall torque 25.5kg.cm@8.4V 25.5kg.cm@8.4V
Stall current 3.3A@8.4V 3.3A@8.4V
Rated Load 6.4kg. cm@8.4V 6.4kg. cm@8.4V
Rated current 850mA@8.4V 850mA@8.4V
KT 7.7kg. cm/A 7.7kg. cm/A
Terminal resistance 2.39 Ω 2.39 Ω
Command signal Digital Packet Digital Packet
Protocol Type Half Duplex Asynchronous Serial Communication Half Duplex Asynchronous Serial Communication
ID range 0-253 0-253
Communication Speed 38400bps ~ 1 Mbps 38400bps ~ 1 Mbps
Control Algorithm PID PID
Neutral Position 180°（2048） 180°（2048）
Running degree 360° (when 0~4096) 360° (when 0~4096)
Resolution [deg/pulse] 0.088°(360°/4096) 0.088°(360°/4096)
Rotating Direction Clockwise(0→4096） Clockwise(0→4096）
Feedback Load, Position,Speed, Input Voltage,Current，Temperature Load, Position,Speed, Input Voltage,Current，Temperature

Operating Modes

  • Mode 0: Angle Servo Mode (default mode, 0–360 degrees position controllable)
  • Mode 1: Motor Constant Speed Mode (speed remains unchanged without deceleration as load increases)
  • Mode 2: Motor Constant Current Mode (current remains unchanged without reduction as load increases)

Constant force output

Multi-turn control

Control of positive and negative 7 turns at the highest accuracy; the number of power-failure turns is not saved (the resolution can be expanded, and the number of turns can be doubled).

Torque hold

Set the output torque value; the servo can maintain this torque (input the target torque value corresponding to address 44, the servo can maintain this torque).

Manuals

Details

FEETECH HL-3620 Servo, FEETECH HL-3620 is a 7.4V, 20kg.cm servo with 360° rotation, double shaft, constant force, serial PID control, and 25T spline for reliable, precise performance.

FEETECH HL-3620 Servo, FEETECH 20KG high-torque coreless motor servo, 360°/4095 resolution, TTL-controlled, 7.4V, 25T spline, ideal for robotics and precise motion control applications.

FEETECH HL-3620 Servo, The FEETECH servo motor features a 7.4V power supply, 20 kg.cm torque, double-shaft design, and serial PID controller for constant force and 360° rotation.

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