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China-based robotic joint module factory supporting OEM customization, quality control, and global delivery.

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+86 18857971991

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  • Inverted Planetary Roller Screw
  • QDD Hollow-Shaft Actuator
  • Frameless Torque Motor
  • Series Elastic Actuator (SEA)
  • Micro Ball Screw
  • EtherCAT/CANopen Joint Module
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  • Joint Module OEM Customization
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© 2026 Robotic Joint Module. All Rights Reserved.|Backed by Linkup Ai Co., Ltd. Manufacturing delivered by the Advanced Manufacturing Division of Linkup Precision.
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Quasi-Direct Drive (QDD) Hollow-Shaft Actuator

Low-ratio backdrivable actuator architecture for impact-tolerant robotic joints and clean internal cable routing.

Target Buyer:Robotics teams optimizing impact response and control transparency.
Quasi-direct-drive actuator with hollow-shaft architecture

Inquiry Email

[email protected]

Open email app

Send target torque/speed, protocol, quantity, and delivery location.

Instant Chat

+86 18857971991

Start WhatsApp

Direct response from our engineering team.

Capability Highlights

  • Sub-10:1 drivetrain strategy for high backdrivability
  • Hollow-shaft routing for cable and harness management
  • Integrated control and encoder-ready architecture

Typical Applications

  • Quadruped robot joints
  • Exoskeleton actuation modules
  • Dynamic mobile manipulation platforms

Engineering Focus

  • Backdrivability versus torque density tradeoff
  • Cable-through-shaft constraints and connector selection
  • Controller tuning for high dynamic bandwidth behavior

Key Evaluation Matrix

MetricTypical RangeWhy It Matters
Gear ratio6:1 to 10:1 typicalControls reflected inertia and impact backdrive behavior.
Peak torque class17-120 Nm range by frame sizeAligns actuator class to payload and motion profile.
Communication interfaceCAN / RS / project-specific optionsImpacts commissioning effort and controller compatibility.

Compliance and Trade Guidance

CE, RoHS, and REACH documentation support is available by project scope. HS classification should be treated as reference guidance only and must be confirmed by importer/broker based on destination rules and final product configuration.

  • Confirm required compliance document list before sample planning.
  • Include destination market and declaration scope in your RFQ message.
  • Review detailed guidance in Resources / Compliance.

Download Package Path

PackageWhen to RequestPurpose
DatasheetModel shortlist stageVerify electrical and performance envelope assumptions.
STEP / IGESMechanical integration reviewValidate envelope, mounting, and cable-routing compatibility.
Communication manualController and commissioning planningAlign protocol behavior, PDO mapping expectations, and diagnostics workflow.

Inquiry Email

[email protected]

Open email app

Send target torque/speed, protocol, quantity, and delivery location.

Instant Chat

+86 18857971991

Start WhatsApp

Direct response from our engineering team.

RFQ Checklist

  1. Peak torque and continuous torque requirements
  2. Gear ratio target and joint inertia assumptions
  3. Hollow-shaft diameter and cable-routing needs
  4. Bus/control stack and commissioning expectations

Risk Controls

  • Overestimating backdrivability at target payload: Validate dynamic behavior with axis-level bench profile before PO lock.
  • Harness wear in rotating joints: Define cable bend radius and routing path during prototype stage.

Product Gallery

QDD actuator module for backdrivable robotic joints
QDD actuator module for backdrivable robotic joints
Low-ratio quasi-direct-drive actuator integration sample
Low-ratio quasi-direct-drive actuator integration sample

Buyer FAQ

Can you provide hollow-shaft diameter customization?

Yes. Hollow-shaft and interface customization can be aligned to your routing architecture and tolerance requirements.

Can we discuss low-ratio selection before sample order?

Yes. Share your axis demand and we will recommend ratio and motor matching for first-round samples.

Related Resources

  • Resources / Compliance
  • Solutions
  • Contact / RFQ

Inquiry Email

[email protected]

Open email app

Send target torque/speed, protocol, quantity, and delivery location.

Instant Chat

+86 18857971991

Start WhatsApp

Direct response from our engineering team.