YASA segmented stator teeth and SMC tooth modules for yokeless AFPM motors with demolding DFM, density control, holder retention, and encapsulation scope.
Use this datasheet as an RFQ planning map for YASA-style and yokeless segmented stator teeth. Final geometry, density, retention, encapsulation, IP boundary, and validation acceptance must be confirmed from controlled buyer drawings and assembly context before tooling is frozen.
| Parameter | RFQ Planning Range | Engineering Note |
|---|---|---|
| Tooth module format | Independent SMC tooth, tooth pair, grouped tooth module, carrier-ready tooth segment, or pre-coated winding-ready tooth | The format should match winding sequence, holder concept, validation plan, and final retention method instead of only the electromagnetic 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. |
| Tooth geometry CTQs | Tooth height, pole-face width, root width, root radius, draft, air-gap face flatness, side-wall taper, and winding-window clearance | These features drive torque-ripple risk, holder fit, winding access, green strength, and inspection strategy. |
| Demolding microcrack risk review | Tooth-root transition, sharp inner corners, tall thin walls, ejection face, parting line, compacted edge, and green-part transfer path | Microcrack and chip risk should be screened during DFM and then tied to visual criteria, sample handling, and inspection records. |
| Density and mechanical route | 7.4-7.6 g/cm3 target where SMC grade, tooth geometry, and compaction route allow | Final density target depends on SMC grade, tooth height, wall thickness, compaction direction, green strength, and acceptable local variation. |
| Winding and insulation interface | Bobbin fit, pre-wound coil clearance, concentrated winding, flat-wire access, coating area map, coating thickness window, and optional Hi-pot scope | The tooth can pass dimensional inspection but still fail assembly if coating, slot clearance, and winding sequence are not reviewed together. |
| Retention / holder interface | Nonmagnetic holder, aluminum carrier, clamp ring, adhesive land, overmold, potting, encapsulation, housing pocket, or buyer-defined fixture | Mechanical retention must be validated against axial magnetic pull, vibration, thermal cycling, winding assembly, and inspection datum transfer. |
| Encapsulation / potting boundary | Loose tooth, carrier-ready tooth, holder-fitted sample, coated tooth, potted subassembly, or encapsulated stator module | Quote pressed tooth, coating, holder fitting, adhesive, potting, encapsulation, and assembled-stator evidence as separate scope items. |
| Inspection and release package | FAI, CMM/3D scan, CTQ table, density or weight result, crack/chip visual check, coating or Hi-pot note, carrier-fit note, sample IDs, and traceability | Engineering, sourcing, and supplier quality should agree which records are needed before sample release or pilot sourcing. |
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.
Evidence to Prepare
NDA status, controlled tooth drawing, assembly envelope, topology context, revision ID, design owner, and manufacturing-only support boundary.
Acceptance Focus
Lets advanced OEMs discuss manufacturability without exposing or diluting their protected motor architecture.
Evidence to Prepare
DFM notes for root radius, draft, wall thickness, ejection face, compaction direction, green-part handling, visual criteria, and sample inspection plan.
Acceptance Focus
Reduces late discovery of fragile tooth-root defects after a high-cost compaction tool is already committed.
Evidence to Prepare
CTQ table, CMM/3D scan, pitch fixture record, tooth-height report, density or weight baseline, sample IDs, and deviation log.
Acceptance Focus
Connects motor NVH, air-gap, torque-ripple, and magnetic repeatability concerns to auditable manufacturing evidence.
Evidence to Prepare
Holder or carrier model, adhesive land map, clamp or housing datum plan, potting/encapsulation boundary, pull/vibration assumptions, and assembly sequence.
Acceptance Focus
Prevents loose tooth samples from passing inspection while the final yokeless stator assembly remains mechanically unresolved.
Evidence to Prepare
Bobbin or coil model, flat-wire clearance, coating area map, coating thickness expectation, mask notes, Hi-pot scope, and winding or impregnation sequence.
Acceptance Focus
Helps buyers avoid a tooth geometry that is magnetically attractive but difficult to wind, coat, pot, or qualify.
| Buyer Checkpoint | Evidence to Prepare | Acceptance Focus |
|---|---|---|
| Can the YASA-style tooth request be separated from buyer-owned motor IP? | NDA status, controlled tooth drawing, assembly envelope, topology context, revision ID, design owner, and manufacturing-only support boundary. | Lets advanced OEMs discuss manufacturability without exposing or diluting their protected motor architecture. |
| Can demolding microcrack and chipped-edge risks be reviewed before tooling release? | DFM notes for root radius, draft, wall thickness, ejection face, compaction direction, green-part handling, visual criteria, and sample inspection plan. | Reduces late discovery of fragile tooth-root defects after a high-cost compaction tool is already committed. |
| Can density uniformity and tooth-to-tooth consistency be proven with records? | CTQ table, CMM/3D scan, pitch fixture record, tooth-height report, density or weight baseline, sample IDs, and deviation log. | Connects motor NVH, air-gap, torque-ripple, and magnetic repeatability concerns to auditable manufacturing evidence. |
| Can holder, carrier, adhesive, potting, and housing responsibility be audited before pilot samples? | Holder or carrier model, adhesive land map, clamp or housing datum plan, potting/encapsulation boundary, pull/vibration assumptions, and assembly sequence. | Prevents loose tooth samples from passing inspection while the final yokeless stator assembly remains mechanically unresolved. |
| Can winding, coating, and insulation scope be validated against the same tooth geometry? | Bobbin or coil model, flat-wire clearance, coating area map, coating thickness expectation, mask notes, Hi-pot scope, and winding or impregnation sequence. | Helps buyers avoid a tooth geometry that is magnetically attractive but difficult to wind, coat, pot, or qualify. |
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 | Circular pitch, tooth height, air-gap face, and datum tolerance by controlled drawing and fixture plan | YASA stators accumulate small tooth errors into air-gap, noise, and torque-ripple risk. |
| Density uniformity | 7.4-7.6 g/cm3 target where geometry and SMC route allow, with local variation reviewed by sample evidence | Uneven density can create magnetic variation, weak sections, and demolding defects in independent teeth. |
| Demolding risk control | Root radius, draft, ejection, green strength, handling fixture, and crack/chip criteria reviewed before tool freeze | Independent teeth expose fragile root transitions that can fail before the motor program reaches magnetic testing. |
| Retention interface | Holder, carrier, adhesive, clamp ring, housing pocket, overmold, potting, or encapsulation scope by project | A yokeless armature depends on a mechanical retention system because the teeth are not stabilized by a conventional back yoke. |
| 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. |
| Release evidence | FAI, CMM/3D scan, density or weight check, crack/chip inspection, carrier-fit note, coating/Hi-pot note, and sample traceability | Engineering and sourcing teams need a record package, not only a loose tooth sample, before approving pilot builds. |
Yes, when the buyer provides the controlled tooth drawing, assembly envelope, retention concept, and validation criteria. We support SMC tooth-module manufacturing and DFM for buyer-controlled YASA-style or yokeless platforms, not buyer-owned motor IP.
We can review holder, carrier, adhesive, potting, coating, and assembly-interface requirements as part of the RFQ. Scope should separate loose teeth, carrier-ready teeth, holder-fitted samples, and assembled or encapsulated stator modules.
No. The page covers SMC tooth-module manufacturing support for buyer-side YASA or yokeless AFPM platforms.
The first control is DFM: root radius, draft, wall thickness, press direction, ejection face, green strength, handling fixture, and visual crack/chip criteria should be reviewed before tooling. Sample release should then include inspection evidence tied to sample IDs.
Yes, when coating, bobbin or coil clearance, flat-wire access, masking, Hi-pot scope, and potting or impregnation sequence are defined in the RFQ. Winding-ready scope should not be assumed from a loose pressed-tooth quote.
A practical pilot package can include FAI, CMM or 3D scan, CTQ table, tooth-height and pitch checks, density or weight baseline, crack/chip inspection, coating or Hi-pot note, carrier-fit record, sample IDs, and traceability.
No. OD, ID, tooth count, height, density, and retention ranges are RFQ planning references. Final feasibility depends on buyer CAD, assembly envelope, SMC grade, compaction route, holder design, and validation method.
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