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Frameless Torque Motor

China-based frameless torque motor supply partner coordinating OEM customization, quality control, and global delivery through Shenzhen/Dongguan production relationships.

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[email protected]

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

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+86 18857971991

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Back to ResourcesTechnical Resource

Frameless Torque Motor Selection Guide

A practical checklist for matching torque, speed, voltage, thermal path, ID/OD geometry, and integration constraints before RFQ.

Frameless torque motor rotor and stator kit for selection review
Frameless torque motor rotor and stator kit for selection review
Axial flux pancake motor for high torque density comparison
Axial flux pancake motor for high torque density comparison

What to Review

Use this resource as an engineering intake page, not as a catalog shortcut. The goal is to make the supplier response specific enough for model selection, sample planning, and internal approval.

  • Define continuous torque from real duty cycle and cooling assumptions.
  • Match winding, bus voltage, and drive current before sample planning.
  • Review OD, ID, stack length, air gap, and mounting method together.

Engineering Inputs

These inputs define whether the topic is only a buying question or a real design constraint. Mark unknown values as TBD instead of omitting them, so engineering can separate fixed constraints from open tradeoffs.

  • Target outside diameter, inside diameter, stack length, and available mounting envelope.
  • Continuous torque, peak torque, target speed, duty cycle, and expected motion profile.
  • DC bus voltage, current limit, cooling method, ambient temperature, and insulation requirement.
  • Lead wire, connector, Hall, encoder, resolver, or bare motor integration requirements.
  • Prototype quantity, annual forecast, target delivery country, and requested timeline.

Buyer Decision Use

The strongest use of this page is to align mechanical, electrical, procurement, and quality teams before the first RFQ email. That alignment reduces quote loops and prevents sample parts from being judged against requirements that were never sent to the supplier.

  • Convert the checklist into your RFQ or supplier form.
  • Attach drawings and mark the revision used for quotation.
  • Define which evidence is needed for sample approval.
Frameless torque motor rotor and stator kit for selection review
Frameless torque motor rotor and stator kit for selection review
Axial flux pancake motor for high torque density comparison
Axial flux pancake motor for high torque density comparison
Flat direct-drive torque motor for space constrained applications
Flat direct-drive torque motor for space constrained applications

RFQ Checklist

A useful frameless motor RFQ should let the supplier evaluate geometry, torque-speed duty, electrical limits, thermal assumptions, and commercial timing together. Sending only a target torque or a reference model usually leads to generic answers.

  1. Target outside diameter, inside diameter, stack length, and available mounting envelope.
  2. Continuous torque, peak torque, target speed, duty cycle, and expected motion profile.
  3. DC bus voltage, current limit, cooling method, ambient temperature, and insulation requirement.
  4. Lead wire, connector, Hall, encoder, resolver, or bare motor integration requirements.
  5. Prototype quantity, annual forecast, target delivery country, and requested timeline.

Evaluation Notes

TopicTypical ScopeWhy It Matters
Selection completenessMechanical, electrical, thermal, commercialReduces quote loops and wrong-model samples.

Risk Controls

Use this section to decide what must be checked before samples, before pilot build, and before repeat orders. The right control is not always a more expensive motor; often it is a clearer drawing, test basis, thermal assumption, or acceptance record.

  • Incomplete RFQ: Use the checklist before sending inquiry.

Sample Approval and Internal Handoff

Before treating any resource checklist as complete, convert it into a sample approval plan. A buyer-side handoff should state what is being approved, who owns each check, and which result would trigger a redesign instead of a purchase order.

GateBuyer CheckSupplier Input
Fit checkEnvelope, air gap, lead exit, and mounting interfaceDrawing, CAD, and configuration notes
Electrical startupResistance, back EMF, insulation, drive compatibilityMeasured values tied to the quoted winding
Duty validationThermal rise, motion profile, and operating limitTest basis or agreed validation method
Production releaseForecast, packaging, records, and revision controlOutgoing checkpoints and delivery plan

Related Pages

  • Contact / RFQ

Inquiry Email

[email protected]

Email app

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

Instant Chat

+86 18857971991

Chat on WhatsApp

Direct response from our engineering team.