Mechanical Fit
OD, ID, stack length, air gap, rotor retention, lead exit, and sensor space are checked against the real axis envelope.
Direct-drive motor kits for OEM engineering teams
Frameless Torque Motors Built Around Your Axis Requirements
Factory-side rotor and stator kit sourcing for robot joints, hollow-shaft gimbals, medical devices, and precision automation. Send your envelope, torque-speed duty, voltage, cooling path, and sample target for a practical RFQ response.
Inquiry Email
Include target torque/speed, quantity, and delivery location.
China Production Network
Shenzhen/Dongguan factory-side coordination for rotor and stator kit projects.
OEM Customization
Winding, stack length, lead wire, sensor, and interface adaptation.
Quality & Delivery
Back EMF, insulation, torque, thermal, and outgoing record planning.
What Buyers Need to De-Risk First
Before Model Selection
The first supplier conversation should clarify fit, performance evidence, sample path, and production readiness.
Torque-Speed Match
Continuous torque, peak torque, speed, duty cycle, voltage, current limit, and cooling assumptions are reviewed together.
Validation Evidence
Back EMF, resistance, insulation, torque behavior, thermal rise, and outgoing records can be aligned to project risk.
Sample-to-Production Path
Prototype quantity, revision control, forecast, packaging, and delivery milestones are planned before commercial release.
Buyer Priorities
The Four Checks That Decide Whether a Supplier Is Worth Contacting
Most buyers are not looking for another generic motor catalog. They need a fast answer on fit, duty, sample risk, and supplier evidence before starting a detailed RFQ.
Will it fit?
OD, ID, stack length, bearing space, encoder space, lead exit, and air-gap control.
Will torque survive duty?
Continuous torque, peak duration, speed, duty cycle, housing material, and cooling method.
Can samples be judged?
Separate fit check, electrical startup, thermal rise, motion behavior, and pilot acceptance.
What evidence exists?
Request configuration notes, process photos, resistance, back EMF, insulation, and outgoing checks.
Product Range
Rotor and Stator Kits for Different Direct-Drive Layouts
Buyers usually need to compare physical architecture before comparing price. The homepage now shows the main product shapes early: standard frameless kits, compact robot-joint motors, large hollow-shaft designs, and custom OEM assemblies.
Standard frameless kits
Rotor and stator sets for compact direct-drive axes.
Robot joint motors
High torque density layouts for actuator modules.
Hollow-shaft designs
Large-aperture motors for cabling, optics, and gimbals.
Custom OEM assemblies
Geometry, winding, lead exit, and interface adaptation.
Application Fit Map
Match the Motor Path to the Real Axis Before Asking for Price
The same frameless torque motor family can behave very differently in a robot joint, gimbal, medical module, or indexing table. This map helps buyers start with the right engineering question instead of comparing only diameter and peak torque.
Robot Joint Actuators
Review: Torque density, reducer fit, cable routing, encoder space, and low-speed smoothness.
Evidence: Ask for winding match, rotor retention notes, thermal assumptions, and sample revision control.
Hollow-Shaft Gimbals
Review: Through-hole size, bearing stack, air-gap control, slip-ring space, and torque ripple sensitivity.
Evidence: Ask for concentricity discussion, assembly handling notes, and back EMF / resistance records.
Precision Automation
Review: Repeatability, thermal drift, indexing duty, clean assembly needs, and drive tuning headroom.
Evidence: Ask for outgoing checks, dimensional confirmation, and validation plan tied to your duty cycle.
Custom OEM Modules
Review: Non-standard OD/ID, stack length, lead exit, sensor interface, potting, and packaging constraints.
Evidence: Ask for DFM notes, sample gate plan, production route, and repeat-order quality record scope.
RFQ Readiness Snapshot
Faster Answers Need Better Inputs
The strongest inquiries include geometry, duty cycle, electrical limits, cooling assumptions, and sample targets.
OD 30-250mm+
Typical Geometry Review
OEM / ODM
Configuration Review
RFQ in 24h
Initial Response Target
Validation Route
What Happens Between Inquiry, Sample, and Repeat Supply
Buyers usually do not need a sales promise first. They need to know whether the supplier can translate a constrained axis into a controlled motor configuration, then prove the sample is moving toward production instead of becoming a one-off part.
1
Architecture review
2
Sample gate
3
Production route
Evidence Buyers Can Request
| Stage | Buyer Sends | We Align |
|---|---|---|
| First RFQ | Envelope, torque-speed duty, voltage, cooling, sample target | Suitable motor family, winding direction, risk questions, missing data |
| Sample | Drawing revision, acceptance priorities, test setup, assembly limits | Sample record, resistance / back EMF / insulation checks, fit feedback |
| Pilot | Pilot quantity, packaging needs, revision freeze, delivery window | Production route, outgoing record scope, packaging plan, shipment cadence |
Knowledge Base
Latest Engineering Guides
Practical buyer-side checklists, decision frameworks, and technical insights from our OEM engineering team.
Buyer GuidesProduct Engineering
How to Select a Frameless Torque Motor for an OEM Direct-Drive Axis
A practical selection guide for engineers comparing frameless torque motors by torque-speed duty, OD/ID geometry, winding, cooling path, and RFQ readiness.
Factory InsightsProduct Engineering
Hollow-Shaft Torque Motor Integration for Gimbals, Rotary Tables, and Precision Automation
A buyer-side guide to using hollow-shaft frameless torque motors for optical gimbals, cable pass-through axes, indexing tables, and low-backlash direct-drive systems.
Buyer GuidesProduct Engineering
Robot Joint Motor Selection: Frameless Torque Motor Checklist for Cobot and Humanoid Actuators
How robotics teams should evaluate frameless robot joint motors by torque density, hollow-shaft routing, reducer fit, thermal rise, torque ripple, and prototype risk.
FAQ
RFQ and Procurement Support
Send the Axis Requirements
Share your drawing, torque-speed duty, voltage/current limit, cooling method, sample quantity, and target schedule. We will review the motor path and reply through email or WhatsApp.
Inquiry Email
Include target torque/speed, quantity, and delivery location.
What to Send for a Useful First Reply
A short inquiry is enough to start, but a stronger RFQ lets engineering answer with a realistic motor path instead of generic catalog suggestions.
- Mechanical envelope: OD, ID, stack length, drawing revision, mounting interface, sensor space, and lead exit.
- Performance duty: continuous torque, peak torque, speed, duty cycle, cooling method, voltage, and current limit.
- Program context: sample quantity, annual forecast, target country, required records, and expected timeline.
Recommended Navigation for New Buyers
| Decision Stage | Best Page | What You Gain |
|---|---|---|
| Architecture fit | Products | Compare torque motor families, geometry, thermal path, and RFQ input requirements. |
| Application risk | Solutions / Applications | Review scenario-based risk controls and measurable validation checkpoints. |
| Supplier execution | OEM Capabilities | Understand DFM, prototype control, quality records, and export delivery governance. |
| Execution start | Contact / RFQ | Use the inquiry checklist to reduce quote loops and get a faster actionable response. |
For deeper decision support, review our engineering blog where each post includes practical buyer-side checklists.