Compact Arm and Wrist Actuators

Compact humanoid arm, elbow, wrist, neck, and torso actuator sourcing for lightweight joints that need smooth control, low mass, and short lead time.

Target Buyer:For humanoid robot teams that need compact upper-body actuators for prototype arms, hands, and perception head modules.

Compact integrated joint module for humanoid arms and wrists

Capability Highlights

Compact rotary actuator options for humanoid upper-limb development
Lightweight motor, reducer, encoder, and controller combinations for arm and wrist joints
Sample comparison support for teams balancing torque density, size, cost, and delivery speed

Typical Applications

Humanoid shoulder and elbow joints
Humanoid wrist and neck joints
Lightweight robotic manipulation test platforms

Engineering Focus

Joint envelope, mass budget, cable routing, and connector clearance
Smooth low-speed control, backlash, encoder resolution, and acoustic noise
Batch consistency for left/right symmetric joints across early pilot builds

Key Evaluation Matrix

Metric	Typical Range	Why It Matters
Actuator mass	Upper-body joint dependent	Arm mass compounds across shoulder, elbow, wrist, and end-effector payload calculations.
Backlash and smoothness	Reducer and control-loop dependent	Manipulation tasks expose low-speed jitter, reversals, and end-effector repeatability problems quickly.

RFQ Checklist

Target joint name and available installation envelope
Output torque, speed, backlash, noise, and mass target
Encoder type, protocol, controller location, and cable length
Reducer architecture preference or existing model benchmark
Prototype quantity and whether mirrored left/right joints are needed

Risk Controls

Upper-limb actuator is mechanically viable but too heavy for the full arm: Quote each joint with a complete arm mass budget and payload target, not as an isolated motor requirement.
Cable and connector location conflicts with compact joint packaging: Include 3D envelope, cable exit direction, connector type, and harness length in the first RFQ.

Product Gallery

Frameless torque motor kit for lightweight humanoid joints

Dual encoder actuator reference for compact robot joints

Buyer FAQ

Can you supply small wrist or neck actuator samples?

Yes. We can start with compact catalog models and then adapt flange, cable, encoder, and controller details after fit validation.

Related Resources

Inquiry Email

[email protected]

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Include target torque/speed, quantity, and delivery location.

Instant Chat

+8618857971991

Chat on WhatsApp

Direct response from our engineering team.

Key Evaluation Matrix

Metric	Typical Range	Why It Matters
Actuator mass	Upper-body joint dependent	Arm mass compounds across shoulder, elbow, wrist, and end-effector payload calculations.
Backlash and smoothness	Reducer and control-loop dependent	Manipulation tasks expose low-speed jitter, reversals, and end-effector repeatability problems quickly.

Risk Controls

Upper-limb actuator is mechanically viable but too heavy for the full arm: Quote each joint with a complete arm mass budget and payload target, not as an isolated motor requirement.

Cable and connector location conflicts with compact joint packaging: Include 3D envelope, cable exit direction, connector type, and harness length in the first RFQ.