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QDD Motors logoQDD Motors

Industrial motion manufacturer supporting custom engineering, strict quality control, and global delivery.

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  • Quasi-Direct Drive (QDD) Actuators
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  • Hollow Shaft Joint Motors
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© 2026 QDD Motors. All Rights Reserved.|QDD Motors supports OEM robot joint motor programs with engineering review, manufacturing coordination, quality records, and export delivery planning.
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Hollow Shaft Robot Joint Motors

Compact hollow-bore BLDC and QDD motor platforms that route cables, sensors, and structure through the robot joint axis.

Target Buyer:Best for mechanical leads who need compact joints with clean cable routing, low stack height, and controlled bearing alignment.

Inquiry Email

[email protected]

Email app

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

Instant Chat

+86 188 5797 1991

Request CAD Model via WhatsApp

Opens a direct WhatsApp thread with the RFQ message prefilled.

Hollow shaft robot joint motor for cable pass-through

Capability Highlights

  • Hollow bore for cable and sensor pass-through
  • Flat, large-diameter torque motor architecture
  • Custom flange, shaft, connector, and bearing-seat options

Typical Applications

  • Humanoid shoulders and wrists
  • Collaborative robot joints
  • Pan-tilt sensor pods
  • Exoskeleton hip and knee joints

Engineering Focus

  • Hollow bore diameter and cable bend radius
  • Bearing preload, runout, and axial/radial load path
  • Thermal path from stator to robot structure
  • Encoder packaging and zeroing method

Key Evaluation Matrix

MetricTypical RangeWhy It Matters
Hollow BoreCustom bore and cable pass-through optionsAllows power, signal, air tube, or structural elements to pass through the joint centerline.
Runout ControlPrecision bearing seat machiningProtects encoder accuracy, bearing life, and low-vibration robot movement.
Form FactorFlat, large-diameter motor geometryImproves torque density while preserving a compact robot limb or arm package.

RFQ Checklist

  1. Provide required hollow bore diameter and pass-through items
  2. Share radial and axial load assumptions
  3. Confirm mounting flange, bearing seat, and output interface
  4. Define continuous torque, thermal limit, and duty cycle
  5. State encoder, brake, and cable exit requirements

Risk Controls

  • Cable fatigue inside the joint: Review bend radius, cable exit direction, strain relief, and connector position during CAD evaluation.
  • Bearing misalignment: Use CNC-controlled bearing seats, CMM inspection, and agreed GD&T on shaft and housing interfaces.
  • Heat trapped in compact joints: Confirm conductive mounting surfaces and thermal derating assumptions before sample approval.

Product Gallery

Hollow shaft actuator with compact joint packaging
Hollow shaft actuator with compact joint packaging
QDD hollow shaft motor for robot joint integration
QDD hollow shaft motor for robot joint integration

Buyer FAQ

Can hollow shaft diameter be customized?

Yes. Bore diameter, wall thickness, bearing layout, and cable exit can be customized when the load path and package limits are known.

Can you provide hollow shaft motors with integrated encoders?

Yes. We can integrate absolute encoder options and support zeroing instructions for robot joint assembly.

What data is needed to size a hollow shaft joint motor?

Share bore diameter, pass-through items, radial and axial load, duty cycle, thermal path, flange pattern, bearing constraints, encoder needs, and cable exit direction.

Related Resources

  • Integrated Robot Joint Modules
  • CNC Machining & Tooling
  • Robotic Arm Joint Solutions
  • Start RFQ

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