Linker Hand L20
The Most Capable Linkage-Drive Dexterous Hand
The Linker Hand L20 is a 21-joint (16 active + 5 passive) dexterous hand that represents the pinnacle of the Linker Hand linkage-drive lineup. With the most active joints in the series, independent four-finger abduction/adduction (±10° side swing), and 100N five-finger grip strength, it tackles the most demanding dexterous manipulation challenges.
Multi-modal perception — standard 6×12 piezoresistive tactile array with optional capacitive, vision, and visual-tactile sensors — builds a comprehensive "vision + touch + force" perception model. The robust linkage structure resists impact, adapting to high-intensity training and industrial scenarios. Edge-cloud architecture with one-click skill deployment lowers the barrier for complex manipulation programming.
Complete Parameter List
Based on Linker Hand L20 Product Manual (2025.09.11). All specifications verified.
⚙ Basic Parameters
| Parameter | Specification | Notes |
|---|---|---|
| Model | Linker Hand L20 | — |
| Degrees of Freedom | 16 | + 5 passive joints |
| Number of Joints | 21 (16 Active + 5 Passive) | Most active joints in lineup |
| Transmission | Linkage Drive | High-rigidity linkage transmission |
| Control Interface | CAN / RS485 | 600kHz communication rate |
| Weight | 1100 g | Complete hand assembly |
| Max Payload | 10 kg | Rated load |
| Operating Voltage | DC 24V ±10% | Industrial power compatible |
| Static Current | 0.2 A | Low idle power |
| No-load Avg. Motor Current | 1.0 A | — |
| Maximum Current | 3 A | Peak system current |
| Repeat Positioning Accuracy | ±0.2 mm | Force-position hybrid control |
| Open/Close Time | 1.2 s | Full stroke |
| Mounting | M3 screw flange | Standard flange interface |
| Firmware Upgrade | Online (via host PC) | Continuous iteration |
💪 Force & Performance
| Performance Metric | Value |
|---|---|
| Max Thumb Fingertip Force | 18 N |
| Max Four-Finger Fingertip Force | 20 N |
| Five-Finger Max Grip Strength | 100 N |
| Max Payload | 10 kg |
| Open/Close Time | 1.2 s |
| Position Repeatability | ±0.2 mm |
📡 Sensor System
| Sensor Type | Specification |
|---|---|
| Piezoresistive (Standard) | 6×12 array, 5g trigger, 20N range, 200FPS, 100K cycles |
| Capacitive (Optional) | ≥50Hz, 0–30N, 0.1N sensitivity, 45° direction, 1cm proximity |
| Vision (Optional) | Fingertip + palm + wrist cameras, depth camera for teleoperation |
| Visual-Tactile (Optional) | Deep learning deformation + 3D force + depth mapping |
🤚 Joint Range of Motion
| Joint | Max Angle | Max Speed |
|---|---|---|
| Thumb Rotation (THUMB1) | 76° | 111.81 °/s |
| Thumb Side Swing (THUMB2) | 90° | 188.17 °/s |
| Thumb Bending (THUMB3–5) | 48.5°–72.2° | 41.32–62.26 °/s |
| Four-Finger Flexion (Joint 1–3) | 85.9° / 101.9° / 79° | 73.91 / 114.29 °/s |
| Four-Finger Side Swing | ±10° | 113.37 °/s |
What Makes L20 Different
The L20 is the most sophisticated hand in the linkage-drive series, purpose-built for cutting-edge research.
Highly Bionic DOF
21 joints (16 active + 5 passive) accurately simulate natural human hand grasping and fine manipulation. Independent four-finger abduction/adduction enables in-hand manipulation strategies impossible with simpler hands.
Multi-Modal Intelligent Interaction
Configurable with force, touch, and vision sensors to accurately detect contact force, object shape, and proximity. Comprehensive "vision + touch + force" perception for unstructured environments.
Edge-Cloud No-Code Deployment
One-click skill deployment from cloud libraries via edge-cloud architecture. Dramatically lowers the barrier for complex manipulation while enabling rapid prototyping and experimentation.
Data Farm Ready
Robust linkage structure resists impact and adapts to high-intensity embodied AI training. Supports efficient data collection for algorithm optimization and data farm construction at scale.
Where L20 Excels
The L20's high DOF count makes it the go-to platform for cutting-edge manipulation research.
Cutting-Edge Research
21 joints with independent finger abduction make the L20 the ideal platform for dexterous manipulation research, reinforcement learning, and Sim2Real transfer studies.
Complex Industrial Automation
100N grip force with 16 active DOF handles high-difficulty industrial tasks — from complex assembly to in-hand reorientation of delicate components.
Humanoid Robot Development
The most human-like hand in the Linker Hand linkage-drive series. 16 active DOF with natural grasping patterns make it the premier choice for humanoid robot end-effectors.
Embodied AI Data Farming
High-DOF architecture enables complex manipulation strategies for training data collection. Robust structure handles high-intensity, long-duration training cycles.
Package Contents
Every L20 order ships with everything needed to get started.
| # | Item | Qty | Description |
|---|---|---|---|
| 1 | Linker Hand L20 | 1 | Fully assembled and calibrated dexterous hand unit |
| 2 | USB-to-CAN Debugging Cable | 1 | For host PC communication |
| 3 | Connector Cable XT30 (2+2) | 1 | Power + CAN signal connection |
| 4 | Power Adapter | 1 | AC-DC adapter for bench operation |
| 5 | Power Cable | 1 | Mains power cable |
| 6 | Product Manual & SDK | 1 | Digital documentation + ROS/ROS2/Python SDK access |
| 7 | Calibration Report | 1 | Per-unit factory calibration data sheet |
Sourced in China, Supported in California
When you buy an L20 from RobX, you get more than a component.
US-Based PhD Technical Support
Robotics PhD in California — fluent English, US business hours.
California Sample Inventory
Units stocked in California. Test in your lab within days.
DDP Pricing & Full Logistics
DDP pricing. One invoice, one delivery.
Direct Manufacturer Relationship
Authorized LinkerBot distributor with priority allocation.
Ready to Test the L20 in Your Lab?
Units in stock in California. Datasheet, pricing, and lead time within one business day.
Talk to a robotics PhD — not a sales rep reading from a script.
