Linker Hand

DexScale

A Diverse and Large-Scale Dataset for General Vision-Tactile Dexterous Manipulation

Dexterous manipulation is essential for building general-purpose embodied agents, yet learning such skills remains challenging due to high-dimensional hand control, complex contact dynamics, and the lack of large-scale, high-quality datasets. Existing robot manipulation datasets are often limited to simple grippers, visual observations, single embodiments, or short-horizon tasks, making them insufficient for studying general dexterous manipulation.

In this work, we introduce DexScale, a diverse and large-scale vision-tactile dataset designed for general dexterous robotic manipulation. DexScale supports dexterous hands with different degrees of freedom and provides synchronized multimodal observations, including robot actions, RGB-D visual perception, and in-hand tactile sensing. Built upon a high-fidelity isomorphic data collection system, DexScale captures fine-grained, smooth, and contact-rich manipulation trajectories that are difficult to obtain with conventional teleoperation pipelines.

The dataset covers a broad range of tasks and scenarios, including tool use, dexterous object manipulation, diverse grasping, bimanual coordination, long-horizon execution, and interactions in varied environments. By scaling dexterous manipulation data across embodiments, modalities, tasks, and scenes, DexScale provides a foundation for training and evaluating policies that integrate spatial perception, tactile feedback, and precise hand control. Together, DexScale aims to bridge the gap between large-scale robot learning and fine-grained dexterous control, offering a data foundation for developing general-purpose vision-tactile manipulation policies.

Dataset Statistics

Diversity and usability assurance through strategic collection.

Scenarios Distribution

Kitchen & Cooking
23%
Music & Toys
22%
Office & Study
12%
Personal Care
11%
Living Room
10%
Others
22%

Atomic-Skills Distribution

Pick & Place
28%
Insert
20%
Open / Close & Press
18%
Tool Use
7%
Pour & apply
7%
Others
20%

Object Categories

Kitchenware
27%
Toys, Games & Music
18%
Office Items
12%
Electronics & Travel
12%
Clothing & Fabric
12%
Others
19%

Episode Duration

< 30s
38%
30s–1min
36%
1–3min
26%
COLOR
DEPTH
TACTILE
LANGUAGE
0W+
TRAJECTORIES
0+
TASKS
0+
SCENARIOS

Multimodal Scenarios

0:00 / 0:00
Scenario 1 / 5

Dexterous Hand Series

Two hands from lightweight deployment to high-DoF precision: linkage drive with CAN/RS485, integrating seamlessly across our humanoid platforms.

16DOF
Linker Hand L20 dexterous robotic hand

High-DoF dexterous hand

Linker Hand L20

18NMax. thumb tip force
20NMax. four-finger tip force
100NMax. five-finger grasp force

Basic specifications

Degrees of freedom16
Number of joints21 (16 active + 5 passive)
Drive typeLinkage transmission
Control interfaceCAN/RS485
Communication rate500 Hz
Weight≈1200 g
Max. payload20 kg
Operating voltageDC 24V—48V
Quiescent current0.3 A
Avg. no-load motion current0.4 A
Max. current1.8 A
Repeat positioning accuracy±0.2 mm
Open/close time0.9 s
6DOF
Linker Hand L6 dexterous robotic hand

Lightweight dexterous hand

Linker Hand L6

10NMax. thumb tip force
8NMax. four-finger tip force
50NMax. five-finger grasp force

Basic specifications

Degrees of freedom6
Number of joints11 (6 active + 5 passive)
Drive typeLinkage transmission
Control interfaceCAN/RS485
Weight607 g
Max. payload28 kg
Operating voltageDC 24V ±10%
Quiescent current0.2 A
Avg. no-load motion current0.75 A
Max. current1.4 A
Repeat positioning accuracy<±0.2 mm
Robot teleoperation hardware

Robot teleoperation system

Deep integration with data collection: real-time capture of robot and teleop device telemetry to support reliable data for humanoid foundation model training.

Teleoperation arm LTA

  • DoF: 7 per arm, 14 total (dual arms)
  • Single-arm reach: 658 mm
  • Mounting: suspended and chest-worn
  • Rated supply: 24 V, 0.075 A
  • Device weight: 1.4 kg
  • Bus: CAN at 1 Mbps
  • Sampling rate: 200 Hz
  • Joint angle resolution: 0.087°

Force-feedback glove LFFG

  • Tracking: 21 DoF per hand, high-precision joint angles
  • Data rate: 100 Hz wired / 30 Hz wireless
  • Power: 5 V USB Type-C
  • Weight: 390 g
  • Joint angle accuracy: 0.08°
  • Peak torque: 3.5 kg·cm
  • Compatible with the full Linker Hand lineup