QDD Motors logoQDD Motors
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QDD Motors logoQDD Motors
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QDD Motors logoQDD Motors

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

Inquiry Email

[email protected]

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

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+86 188 5797 1991

Request CAD Model via WhatsApp

Opens a direct WhatsApp thread with the RFQ message prefilled.

Products
  • Quasi-Direct Drive (QDD) Actuators
  • Robot Joint Motor Modules
  • Hollow Shaft Joint Motors
  • High Torque BLDC Motors
  • Low Ratio Geared Motors
  • Standard AC Motors
  • Stainless Steel Washdown Motors
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  • Exoskeleton Power Solutions
  • Quadruped & Humanoid Joints
  • Humanoid Robot Actuators
  • Quadruped Robot Actuators
  • Robotic Arm Joint Solutions
  • Mobile Robot Drive Systems
  • Medical Rehabilitation Motors
  • Harsh Environment
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  • Stator & Rotor Lamination
  • CNC Machining & Tooling
  • Assembly & Testing
  • Custom Engineering
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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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Custom Motor Engineering

Collaborative DFM, electromagnetic design, actuator architecture review, and prototype governance for custom QDD, BLDC, hollow-shaft, and integrated robot motor programs.

Best Fit For:Ideal for OEM R&D teams that have a target envelope or performance problem but need factory-side engineering to turn it into a manufacturable motor specification.

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.

Custom integrated motor engineering sample

Capability Highlights

  • Electromagnetic, thermal, mechanical, and driver-interface review
  • Rapid samples with revision-controlled requirements and CTQ gates
  • Custom winding, shaft, flange, housing, encoder, brake, and tooling support

Typical Engagement Scope

  • Non-standard robot joint motor form factors
  • Unique thermal, torque, speed, or voltage requirements
  • Custom actuator modules with encoder and driver integration
  • Supplier replacement projects needing controlled migration

Execution Focus

  • Translate mechanical envelope into torque, winding, thermal, and control requirements
  • Close ambiguity around voltage, duty cycle, cooling, encoder, brake, and interface choices
  • DFM, DFMEA/PFMEA, sample acceptance, and production-intent tooling planning
  • Revision control, cost-down path, and sample-to-volume supply governance

Program Evaluation Matrix

Program MetricTypical RangeProcurement Value
DFM review depthMechanical, electromagnetic, thermal, and production reviewReduces redesign iterations and accelerates time-to-market.
Sample Lead TimeTypically 4-8 weeks by complexityBuyers can plan prototype gates only when tooling, winding, and validation scope are visible.
Customization ScopeWinding, voltage, shaft, flange, housing, encoder, brake, driverClarifies whether the project is a minor adaptation or a new motor platform requiring deeper validation.
CTQ ControlBuyer-defined pass/fail limits and inspection recordsCTQ control prevents a working sample from becoming an unstable production program.

RFQ Preparation Checklist

  1. Share 3D CAD envelope, 2D interface drawing, and current design pain points
  2. Define peak torque, continuous torque, speed, voltage, duty cycle, and cooling assumptions
  3. Confirm encoder, brake, driver, CAN FD, RS485, EtherCAT, or firmware requirements
  4. Define CTQ characteristics, sample acceptance limits, documentation needs, and test method
  5. State sample quantity, target cost, annual forecast, tooling expectations, and launch timing

Risk and Mitigation

  • Prototype to MP divergence: Use production-intent tooling as early as possible in the validation phase.
  • Requirements remain too vague for a useful quote: Convert goals into torque-speed points, thermal limits, envelope dimensions, interface requirements, and CTQ acceptance limits.
  • Cost target conflicts with technical target: Run architecture trade-offs early across winding, magnet grade, reducer ratio, encoder, housing, and inspection scope.

Related Products

Custom QDD BLDC motor platform
Custom QDD BLDC motor platform
Compact BLDC motor for OEM customization
Compact BLDC motor for OEM customization

Buyer FAQ

What is the typical custom sample lead time?

Depending on complexity, custom samples take 4 to 8 weeks.

Can you start from an existing motor we want to replace?

Yes. Share the existing motor data, failure points, interface limits, and target improvements so we can plan a replacement architecture.

What makes a custom motor RFQ decision-ready?

A decision-ready RFQ includes CAD, torque-speed points, voltage, duty cycle, envelope, CTQs, test method, quantity forecast, and documentation expectations.

Related Resources

  • QDD Actuators
  • High Torque BLDC Motors
  • Assembly & Testing
  • Start DFM Review

Request OEM Support

Smart RFQ Builder

Fill out the core engineering inputs below. The request goes directly to our engineering inbox, and you can still use the email fallback for CAD, BOM, drawings, or datasheets.

File Attachments (CAD / BOM / Specs)

Because we value your IP security, this form does not upload CAD or BOM files to our web server. Use the email fallback if files need to travel with the first request. Please attach STEP files, 2D drawings, BOM sheets, torque curves, or PDF specs directly in email.

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