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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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Direct response from our engineering team.

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  • Large Hollow-Shaft Torque Motors
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© 2026 Frameless Torque Motor. All Rights Reserved.|Factory-facing OEM/ODM support for frameless torque motors, robot joint motors, and custom direct-drive motor assemblies.
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Custom Frameless Motor RFQ Checklist

The required data set for a useful quotation: geometry, torque-speed duty, electrical limits, cooling, environment, sensor needs, quantity, and timeline.

High torque density frameless motor kit for RFQ preparation
High torque density frameless motor kit for RFQ preparation
Low cogging rotor and stator kit for torque ripple discussion
Low cogging rotor and stator kit for torque ripple discussion

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.

  • 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.

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.
High torque density frameless motor kit for RFQ preparation
High torque density frameless motor kit for RFQ preparation
Low cogging rotor and stator kit for torque ripple discussion
Low cogging rotor and stator kit for torque ripple discussion
Compact hollow shaft motor for cabling and interface requirements
Compact hollow shaft motor for cabling and interface requirements

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.

Copy-Ready RFQ Email Template

This template is designed to reduce the first two or three clarification loops. Buyers can paste it into email or WhatsApp and mark unknown values as TBD.

Hello framelesstorquemotor.com engineering team,

We are evaluating a frameless torque motor for [application / machine module]. Please review the following RFQ baseline:

  • Target product family: [frameless kit / robot joint / hollow-shaft / custom]
  • OD / ID / stack length limits: [values]
  • Continuous torque, peak torque, speed, duty cycle: [values]
  • DC bus voltage, max current, drive model: [values]
  • Cooling method and ambient temperature: [values]
  • Sensor, encoder, lead wire, and connector needs: [values]
  • Prototype quantity, annual forecast, destination, timeline: [values]
  • Requested files: [datasheet / 2D drawing / STEP / IGES / test record format]
AttachmentBest FormatWhy It Helps
Mechanical drawingPDF plus STEP/IGES if availableLocks OD, ID, stack, mounting, lead exit, and revision context.
Duty profileTable or short spreadsheetSeparates continuous, peak, acceleration, and holding conditions.
Drive informationDrive model, voltage, current, control notesLets winding direction and speed ceiling be checked early.
Acceptance criteriaBullet list by sample gatePrevents one prototype from being judged against hidden production requirements.

Evaluation Notes

TopicTypical ScopeWhy It Matters
RFQ readinessComplete enough for model and custom path reviewImproves first response quality and reduces back-and-forth.

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.

  • Slow quotation loop: Send missing items as TBD instead of leaving requirements implicit.

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.