Unitree D2 Review: Specs and Uses of the 7-Axis Lightweight Robotic Arm
Updated: 7 days ago
The Unitree D2 is a 7-axis robotic arm with a gripper, weighing 5.9 kg and made to be mounted on mobile robots. Unitree does not list a price on the product page. This review covers its specifications, design and uses.
Quick Verdict
The D2 is an arm for robots, not for a factory bench. It runs directly from a 36 to 58 V battery, weighs under 6 kg and can be mounted upright, sideways, hanging or on a mobile platform, which makes it a natural partner for quadrupeds such as the B2. Seven axes give it the redundancy of a human arm. It carries 3 kg; the page also mentions a maximum of 5 kg. Repeatability is not stated, so it should not be compared with industrial cobots on precision.
Unitree D2 at a Glance
Degrees of freedom: 7 plus gripper
Weight: 5.9 kg
Payload: 3 kg
Gripper working radius: 780 mm
Supply voltage: 36 to 58 V
Price: not listed on the product page
Unitree D2 Technical Specifications
The table below lists the manufacturer's specifications.
Specification | Unitree D2 |
Manufacturer | Unitree Robotics |
Degrees of freedom | 7 plus 1 gripper |
Net weight | 5.9 kg |
Payload | 3 kg; maximum load capacity 5 kg |
Arm length | 633 mm |
Gripper working radius | 780 mm |
Body material | Aluminium alloy |
Mounting | Vertical, side, suspended or mobile platform |
Supply voltage | 36 to 58 V |
Power | Typical up to 60 W; peak 870 W |
Communication | UDP and serial |
Interfaces | XT30 power, USB Type-C, Ethernet, RS485 |
Control frequency | 500 Hz |
Control methods | SDK, host computer, drag teaching, offline trajectory |
Repeatability is not stated on the page.
Detailed Technical Data
J1 to J3: peak torque 60 N·m, 18.7 rad/s
J4 and J5: peak torque 30 N·m, 52.4 rad/s
J6 and J7: peak torque 10 N·m, 37.7 rad/s
Design and Build Quality
The arm is aluminium alloy with interior permanent magnet synchronous motors and an integrated controller based on a Cortex-M33 processor. Typical power draw of 60 W or less suits battery operation.
Programming and Software
SDK and Host Software
The arm is controlled through an SDK or a host computer program.
Drag Teaching
Positions can be taught by moving the arm by hand.
Offline Trajectories
Stored trajectories can be replayed.
Unitree D2 Applications and Use Cases
Mobile Manipulation
Mounted on a quadruped or wheeled base, the arm opens doors, presses buttons and picks objects.
Research
Seven axes and open control suit manipulation research.
Teleoperation
The arm can be driven remotely for inspection tasks.
Unitree D2 Price and Value
Unitree does not list a price for the D2 on the product page.
For the company behind the product, read the Unitree Robotics Company Profile: History, Products, Stock Listing and Controversies.
Pros and Cons
Pros
Seven axes
5.9 kg with 3 kg payload
Runs from battery voltage
Several mounting positions
Drag teaching and SDK
Cons
Repeatability not stated
Two payload figures on the page
No price on the product page
Who Should Buy the Unitree D2?
It fits developers who need an arm on a mobile robot, especially on Unitree's own quadrupeds.
Unitree D2 FAQ
How much does the Unitree D2 cost?
Unitree does not list a price on the product page.
How many axes does the Unitree D2 have?
Seven, plus a gripper.
What is the payload of the Unitree D2?
3 kg; the page also states a maximum load capacity of 5 kg.
How much does the Unitree D2 weigh?
5.9 kg.
What is the reach of the Unitree D2?
The arm length is 633 mm and the gripper working radius is 780 mm.
What power does the Unitree D2 need?
36 to 58 V; typical power up to 60 W.
How is the Unitree D2 programmed?
By SDK, host computer, drag teaching or offline trajectory.
Can the Unitree D2 be mounted on a robot dog?
Yes. Mobile platform mounting is listed.
Specifications are based on manufacturer information and may change.
