Custom SMC tooth modules for YASA and yokeless axial flux stators where winding access, density uniformity, and mechanical retention must be engineered together.
YASA tooth modules are quoted from the tooth drawing and the assembled stator system together. Winding access, retention, density uniformity, and pitch control should be reviewed before the buyer freezes tooling.
| Parameter | RFQ Planning Range | Engineering Note |
|---|---|---|
| Tooth module format | Independent SMC tooth, tooth pair, or carrier-ready tooth segment | The format should match the winding sequence and final retention method instead of only the magnetic model. |
| Parent stator envelope | OD 30-800 mm; ID 25 mm min.; axial height 5-110 mm | The individual tooth is reviewed against rotor clearance, holder geometry, and final stator stack-up. |
| Tooth count / circular pitch | 3-112 tooth positions | Higher counts increase the need for pitch fixtures, datum discipline, and cumulative error control. |
| Density and mechanical route | 7.4-7.6 g/cm3 target where geometry and material route allow | Final density target depends on SMC grade, tooth height, wall thickness, compaction direction, and green strength. |
| Retention and encapsulation | Holder, adhesive, overmold, resin potting, clamp ring, or buyer-defined carrier | Mechanical retention must be validated against axial magnetic pull, vibration, thermal cycling, and winding assembly. |
Evidence Pack
For custom product RFQs, the useful proof is a controlled evidence package: drawings, material route, inspection records, validation scope, and sample acceptance notes.
| Buyer Checkpoint | Evidence to Prepare | Acceptance Focus |
|---|---|---|
| Drawing and revision control | Individual tooth STEP/DXF plus the full stator assembly model and revision ID; Slot count, pole count, tooth count, rotor configuration, air gap, and axial stack height | Keeps quotation, tooling review, inspection, and sample feedback tied to the same controlled design baseline. |
| Material and process route | Recommended buyer inputs: full stator assembly CAD, tooth drawing, target density, air gap, pull-force or vibration assumptions, and winding access model.; Run DFM before tool freeze for draft, radius, tooth-root wall thickness, ejection surface, and fragile green-part handling. | Prevents buyers from comparing catalog material claims without the operating point, geometry, and process route. |
| Magnetic and dimensional validation | Recommended reports: dimensional inspection, weight or density check, visual crack inspection, coating or Hi-pot result, and carrier-fit sample notes.; Tooth-to-tooth consistency: Pitch and height tolerance by drawing and fixture plan; Density uniformity: Geometry and compaction-direction dependent; Winding space gain: Buyer coil and bobbin design dependent | Turns the sample from a loose part into an engineering record that can support design, quality, and procurement review. |
| Risk controls before tooling | Demolding microcracks appear at tooth roots or sharp transitions: Review radii, draft, ejection, green strength, compaction pressure, and handling fixture before tooling release.; Independent teeth shift under axial magnetic pull or vibration: Lock the holder, adhesive, potting, clamp, or carrier strategy together with the tooth datum scheme. | Surfaces compaction, air-gap, winding, coating, and packaging risks before the buyer commits to tooling. |
Any released claim should be tied to the buyer drawing, sample ID, material batch, inspection method, and agreed test condition instead of a generic marketing statement.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Tooth-to-tooth consistency | Pitch and height tolerance by drawing and fixture plan | YASA stators accumulate small tooth errors into air-gap, noise, and torque-ripple risk. |
| Density uniformity | Geometry and compaction-direction dependent | Uneven density can create magnetic variation, weak sections, and demolding defects in independent teeth. |
| Winding space gain | Buyer coil and bobbin design dependent | The business case for segmented YASA teeth often depends on simpler winding and higher copper fill. |
Yes, when the buyer provides the controlled tooth drawing, assembly envelope, retention concept, and validation criteria. We support manufacturing and DFM for the tooth component, not buyer-owned motor IP.
We can review holder, adhesive, potting, coating, and assembly interface requirements as part of the RFQ. Scope should separate loose teeth, carrier-ready teeth, and assembled stator modules.
No. The page covers SMC tooth-module manufacturing support for buyer-side YASA or yokeless AFPM platforms.
Inquiry Email
Attach STEP/DXF/PDF plus frequency, flux density, sample quantity, annual forecast, and destination.
