Request datasheets, 2D mounting drawings, STEP/IGES models, and performance data after the product family and application scope are clear.
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.
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.
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.
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.
CAD files should be controlled engineering artifacts, not generic downloads detached from a quoted motor configuration. Use the structure below to request the right file package for your review stage.
| File Type | When to Request | Required Context |
|---|---|---|
| Preliminary datasheet | After the product family, torque-speed duty, and voltage window are clear. | Target OD/ID, stack length, continuous torque, peak torque, speed, cooling basis. |
| 2D mounting drawing | Before mechanical packaging, fixture planning, or sample PO. | Drawing revision, mounting face, air-gap assumptions, lead exit, sensor space. |
| STEP / IGES model | After the selected configuration is narrowed enough for CAD fit review. | Project name, candidate model or custom envelope, file format, revision owner. |
| Performance curve package | Before design freeze or sample acceptance for torque-sensitive axes. | Quoted winding, bus voltage, current limit, thermal path, duty cycle, test basis. |
| Inspection record format | Before sample approval, pilot build, or supplier qualification. | Required checks: resistance, back EMF, insulation, hi-pot, visual, outgoing record. |
Suggested request wording
Please share the datasheet / drawing / STEP package for project [project name], candidate configuration [model or envelope], drawing revision [revision], OD [value], ID [value], stack length [value], winding target [voltage/current/speed], and CAD format [STEP / IGES].
| Topic | Typical Scope | Why It Matters |
|---|---|---|
| Download scope | PDF, 2D drawing, STEP, IGES by request | Keeps engineering files aligned with the quoted configuration. |
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.
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.
| Gate | Buyer Check | Supplier Input |
|---|---|---|
| Fit check | Envelope, air gap, lead exit, and mounting interface | Drawing, CAD, and configuration notes |
| Electrical startup | Resistance, back EMF, insulation, drive compatibility | Measured values tied to the quoted winding |
| Duty validation | Thermal rise, motion profile, and operating limit | Test basis or agreed validation method |
| Production release | Forecast, packaging, records, and revision control | Outgoing checkpoints and delivery plan |
Inquiry Email
Include target torque/speed, quantity, and delivery location.