Simple Actuation Architecture
One actuated degree of freedom controls the thumb. The four remaining fingers share the other actuated degree of freedom.
Unitree Dex2/5
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Overview
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Five-Finger Tendon-Driven Robotic Hand
Unitree Dex2/5 Dexterous Hand
Dex2/5 is Unitree's lightweight five-finger, gear-and-tendon-driven robotic hand. It combines 10 total mechanical degrees of freedom with 2 actuated degrees of freedom in a compact 365 g design.
One actuated channel drives the thumb, while a second shared channel coordinates the index, middle, ring and little fingers. This architecture is designed for coordinated grasping rather than independent active control of all five fingers.
- 10 Total degrees of freedom
- 2 Actuated degrees of freedom
- 365 g Hand weight
- 8 mm Minimum grip diameter
- 0.5 s Minimum fist-closing time
- 1000 Hz Communication rate
Product Overview
Compact Hardware for Coordinated Grasping
Dex2/5 packages a five-finger form, compact dimensions, concealed wiring and high-rate joint communication into a lightweight robotic-hand platform.
Compact Flat-Hand Length
The official flat-state dimensions are 151 × 70 × 63 mm, supporting integration where hand mass and envelope matter.
Joint Control and Feedback
Published software functions cover joint state, motion, torque, temperature, voltage, current, stiffness and damping data.
Actuation Explained
What 10 DOF and 2 Actuated DOF Mean
Mechanical freedom and independent actuation are not the same. Dex2/5 has 10 total degrees of freedom across its joint structure, but only two are actively commanded.
Command Structure
Thumb Motion + Coordinated Four-Finger Motion
The thumb receives one actuated degree of freedom. The index, middle, ring and little fingers share the second, causing those four fingers to move as a coordinated group rather than as four independently actuated fingers.
Transmission and Motion
- Five-finger gear-and-tendon rope drive
- 10 total mechanical degrees of freedom
- 2 actuated degrees of freedom
- 0.5 s official minimum fist-closing time
Selection note: choose Dex2/5 when coordinated open-and-close grasping matches the project. If the task requires independently commanded fingers, compare the actuation architecture of other Unitree dexterous hands before ordering.
Fatigue Testing
More Than 100,000 Cycles
Unitree states that the complete Dex2/5 hand passed more than 100,000 fatigue cycles to support stable, reliable long-term operation.
This is a manufacturer test count, not a guaranteed service life or warranty term. The public page does not specify the test load, speed, environment or pass/fail criteria.
Impact Resistance
More Than 100 Drop Tests
Unitree reports that Dex2/5 completed more than 100 drop tests as part of its durability validation.
The official product page does not publish the drop height, impact surface, orientation or an IP/impact-protection rating.
Integrated Construction
Concealed Internal Wiring
Unitree routes wiring inside the Dex2/5 structure for a clean, integrated hand design. The manufacturer lists compatibility with G1 and R1 models.
Compatibility does not establish universal plug-and-play installation. Confirm the robot version, wrist, mechanical interface, hand side and electrical/control requirements before purchase.
Compact Form
365 g Hand Weight
Dex2/5 measures 151 × 70 × 63 mm in its flat state and weighs 365 g, combining a human-inspired five-finger form with a compact installation envelope.
Gripping Performance
Force and Load Results in Context
Fingertip-force values and conditional load-test results describe different measurements. They should not be combined or interpreted as an unrestricted payload rating.
Thumb Fingertip Force
Official fingertip-force value published for the thumb.
Four-Finger Fingertip Force
Combined official value for the index, middle, ring and little fingers—not 15 N per finger.
Palm Facing Down
Maximum result stated for the official test orientation.
Room temperature; grasping a 5 cm round rigid object; palm facing down.
Palm Facing Left
Maximum result stated for the official test orientation.
Room temperature; grasping a 5 cm round rigid object; palm facing left.
These 1.5 kg figures are test-condition results, not a universal load capacity. Object geometry, surface friction, grasp pose, motion, acceleration and application configuration can change actual performance.
Joint Range
Published Joint Angles
Dex2/5 uses two thumb joints and two joint stages across the coordinated four-finger group.
0–42°
Thumb Joint 0
0–105°
Thumb Joint 1
0–88°
Four-Finger Joint 0
0–105°
Four-Finger Joint 1
Selection Guidance
Is Dex2/5 a Match for Your Project?
The guidance below is derived from the published architecture and specifications. It is not a set of official Unitree customer case studies.
Consider Dex2/5 For
- Coordinated grasp-and-release development
- Compatible G1 or R1 manipulation projects
- Gear-and-tendon mechanism demonstrations
- Weight-sensitive research or education platforms
Compare Other Hands When You Need
- Independent active control of individual fingers
- A published tactile-sensor array specification
- Published repeat-positioning accuracy
- A published IP protection rating
Compatibility and Integration
Confirm the Complete Configuration Before Ordering
Unitree lists G1 and R1 compatibility, but the intended robot, wrist, hand side and system interfaces still need project-level confirmation.
Ordering Checklist
- Robot and version Specify G1, R1 or standalone integration and identify the exact robot configuration.
- Hand side and quantity Confirm left hand, right hand or pair and the quantity required.
- Wrist and mechanical interface Verify the wrist version, mounting geometry and any required mechanical adaptation.
- Electrical interface Confirm the 24–60 V power design, connector, pinout and current capacity.
- Control integration Confirm RS485 protocol, software documentation, feedback requirements and host-controller compatibility.
- Quoted contents Treat only the items explicitly listed in the SpeedyDrone quotation as included.
Published Integration Essentials
- Operating voltage: 24–60 V
- Static current: 0.1 A at 58 V
- Maximum current: 1.5 A at 58 V
- Communication interface: RS485
- Communication rate: 1000 Hz
- Operating temperature: −20°C to 60°C
Unitree's official repository contains left- and right-hand URDF files, mesh assets and G1 5010 wrist variants. Resource availability does not by itself guarantee mechanical, electrical or software compatibility with every robot configuration.
Technical Data
Unitree Dex2/5 Specifications
All product and performance values below are taken from Unitree's official Dex2/5 product page.
| Mechanical and Motion | |
|---|---|
| Product Type | Five-finger tendon-driven dexterous hand |
| Total Degrees of Freedom | 10 |
| Actuated Degrees of Freedom | 2 |
| Thumb Actuation | 1 actuated degree of freedom |
| Index, Middle, Ring and Little Fingers | Share 1 actuated degree of freedom |
| Weight | 365 g |
| Dimensions [1] | 151 × 70 × 63 mm |
| Transmission Mechanism | Gear-and-tendon rope drive |
| Thumb Joint 0 | 0–42° |
| Thumb Joint 1 | 0–105° |
| Four-Finger Joint 0 | 0–88° |
| Four-Finger Joint 1 | 0–105° |
| Minimum Fist-Closing Time | 0.5 s |
| Minimum Grip Diameter | 8 mm |
| Thumb Fingertip Force | 15 N |
| Four-Finger Fingertip Force | 15 N combined across the index, middle, ring and little fingers |
| Electrical and Environment | |
| Operating Voltage | 24–60 V |
| Static Current | 0.1 A at 58 V |
| Maximum Current | 1.5 A at 58 V |
| Communication Interface | RS485 |
| Operating Temperature | −20°C to 60°C |
| Conditional Load Tests | |
| Palm Facing Down | Maximum 1.5 kg at room temperature while gripping a 5 cm round rigid object |
| Palm Facing Left | Maximum 1.5 kg at room temperature while gripping a 5 cm round rigid object |
| Software Functions | |
| Communication Rate | 1000 Hz |
| Sensing Feedback | Joint mode, joint position, joint velocity, joint torque, joint temperature, voltage and current |
| Control Feedback | Joint mode, joint position, joint velocity, joint torque, joint stiffness coefficient and joint damping coefficient |
Frequently Asked Questions
Unitree Dex2/5 FAQ
What do 10 total DOF and 2 actuated DOF mean?
Dex2/5 has 10 degrees of freedom in its mechanical joint structure but only two actively commanded degrees of freedom. One controls the thumb; the other is shared by the index, middle, ring and little fingers.
Can all five fingers be controlled independently?
No. The thumb has its own actuated channel, while the other four fingers share one channel and move as a coordinated group. Confirm that this actuation architecture suits the task before ordering.
Which Unitree robots are compatible?
Unitree lists G1 and R1 compatibility. Confirm the exact robot version, wrist, left/right hand requirement, mechanical connection, power system and control interface because the public compatibility statement does not guarantee universal plug-and-play installation.
What gripping performance does Unitree publish?
Unitree lists 15 N at the thumb, 15 N combined across the other four fingertips, an 8 mm minimum grip diameter and a 0.5 s minimum fist-closing time. It also publishes two conditional 1.5 kg load-test results using a 5 cm round rigid object at room temperature.
Is 1.5 kg the rated payload in every application?
No. The two 1.5 kg figures are maximum results for specified tests at room temperature while gripping a 5 cm round rigid object, with the palm facing down or left. They should not be presented as an unconditional payload rating.
What power and communication does Dex2/5 require?
The published operating range is 24–60 V. Unitree lists RS485 communication at 1000 Hz, 0.1 A static current at 58 V and 1.5 A maximum current at 58 V. Confirm connector, pinout, protocol and host-controller requirements for the intended installation.
What feedback data is published?
Published sensing feedback includes joint mode, position, velocity, torque, temperature, voltage and current. Published control feedback includes joint mode, position, velocity, torque, stiffness coefficient and damping coefficient.
Are URDF and mesh files available?
Yes. Unitree's official repository includes left- and right-hand URDF files, mesh assets and G1 5010 wrist variants. Confirm that the selected resource matches the physical configuration being ordered.
Does Unitree publish tactile sensing, repeatability or an IP rating?
Unitree's public Dex2/5 product page does not list a tactile-sensor array specification, repeat-positioning accuracy or an IP protection rating. Do not assume those specifications apply to Dex2/5.
What is included with an order?
This description does not define package contents. Confirm the exact hand side, quantity, cables, mounting parts, wrist adapters, power components, control hardware and documentation listed in the SpeedyDrone quotation before purchase.
Plan Your Dex2/5 Integration with SpeedyDrone Canada
Send us the robot model and version, wrist configuration, required hand side and quantity, intended grasping task, electrical environment and control-system requirements.
Request a QuoteShipping & Pickup
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Free shipping is available across most Canadian provinces on orders of CAD $149 or more before tax.
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Dispatch Time
Same-day dispatch is available for in-stock orders confirmed and paid before 4:00 p.m. EST, Monday to Friday.
Orders placed after cutoff, on weekends, or on public holidays ship the next business day.
Estimated Delivery
- Ontario: 1–2 business days
- QC / MB / SK / AB / BC: 2–5 business days
- Atlantic Canada: 3–5 business days
- NT / NU / YT: 3–10 business days, weather dependent
Delivery timelines are estimates from the date of dispatch and exclude weekends and statutory holidays.
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Returns & Exchanges
We want every order to feel clear and confident. Please review the summary below together with our full policy for complete terms.
30-Day Return Window
Returns may be requested within 30 days from the official delivery date recorded by the carrier.
Item Condition
Items must be unused, unopened, and undamaged, with original packaging, accessories, manuals, and included components.
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Restocking Fee
Opened or handled items may be subject to a 20% restocking fee, depending on overall condition.