Hybrid Page: Tool + Decision Report
Arc Ferrite Magnets Checker + Report
The arc ferrite magnets checker solves tool intent first: run an arc ferrite magnets screening with deterministic output, boundary notes, and next action. Lower sections add source-backed ranges, method, risk tradeoffs, and procurement controls so decisions are defensible.
Published: May 6, 2026
Evidence updated: May 6, 2026 (stage1b deep-enhance round: standards/feedstock/compliance evidence increment)
SERP reviewed: May 6, 2026
Review cadence: Re-verify SERP intent and evidence set every 6 months, or earlier when policy/material signals shift.
Distinct angle: one canonical URL for arc ferrite magnets mixed intent (calculator + decision report), not split pages.
Tool Layer: Run The Arc Ferrite Magnets Fit Checker
Input geometry, duty, and assumption band. Output includes verdict, uncertainty, boundary notes, and minimum next step.
Input + Action
Defaults represent a common motor ferrite-arc baseline with a Y30-Y35 data band. Any input change clears previous output to avoid stale decisions.
Empty state: run the checker to generate your result.
Output includes fit verdict, uncertainty, boundary conditions, and minimum continue path.
Report Summary: Core Conclusions With Numbers
Middle layer converts tool output into decision-ready conclusions, suitability boundaries, and evidence pointers.
SERP intent is transactional first, not theory-first
Brave snapshot (May 6, 2026): 9/10 top results are supplier/catalog/RFQ pages
The query pattern for arc ferrite magnets is mostly dimension + grade + quote workflows. Tool-first interaction remains mandatory before long-form explanation, but SERP composition is region/time dependent.
Suitable: Users needing a fast go/no-go signal before RFQ packaging.
Not suitable: Users expecting one fixed catalog SKU with no geometry or duty validation.
Evidence IDs: S1, S2, S3, S17
Material boundaries should be defined by standards, not grade names
ASTM A1054 scope: Br about 0.2-0.5 T and HcJ about 160-400 kA/m; ASTM A977 warns methods can yield non-identical values
This checker intentionally uses a narrower 0.40-0.45 T / 215-239 kA/m screening band inside the ASTM envelope. Supplier acceptance should reference ASTM A977 / IEC 60404-5 traceable method data, not grade labels alone.
Suitable: Cost-sensitive motors with moderate speed and explicit thermal assumptions.
Not suitable: Very high back-EMF density targets inside compact envelopes.
Evidence IDs: S4, S5, S6
Rare-earth-free path has a clear performance boundary and a redesign path
DOE (2022): substitution away from NdFeB is difficult and weaker magnets are not suitable for EV/wind without redesign; IEEE 2025 ferrite-SynRM reports ~28% material-cost reduction in one validated design
Counterexample matters: ferrite can work in EV propulsion when the architecture is redesigned (flux barriers, sleeve, loss controls), but direct material swap without system redesign is often not decision-safe.
Suitable: Programs willing to redesign winding/rotor topology and validate at system level.
Not suitable: Drop-in replacement plans that expect NdFeB-like output without architecture changes.
Evidence IDs: S7, S8
Ferrite feedstocks still carry concentration risk
USGS 2026: U.S. strontium net import reliance is 100% (2025e) and iron oxide pigments net import reliance is 84% (2025e)
Ferrite reduces rare-earth dependence but does not eliminate raw-material concentration risk. Strontium import concentration and ferrite-relevant iron-oxide import concentration should be tracked in sourcing gates.
Suitable: Programs with release milestones and supplier alternates designed up front.
Not suitable: Single-source programs that only optimize immediate unit price.
Evidence IDs: S9, S10, S11, S12
Compliance and material disclosure should be baked into RFQ
RoHS Annex II keeps homogeneous-material limits (0.1% / 0.01% Cd); ECHA Candidate List update on February 4, 2026 moved the list to 253 entries and triggers a 6-month article-notification clock
RFQ packages should include coating/binder declarations, homogeneous-material screening scope, and a dated SVHC monitoring checkpoint before pilot freeze.
Suitable: Teams with quality-gate ownership and traceable document control.
Not suitable: Projects that treat compliance as post-order paperwork.
Evidence IDs: S13, S14, S15, S16
Anti-duplication angle: this page vs adjacent intents
Keep one canonical URL per intent cluster so tool intent and report intent do not cannibalize each other.
| Page | Primary intent | What this page does differently |
|---|---|---|
| /learn/arc-ferrite-magnets | Plural-intent screening for geometry + duty + risk boundaries | Combines tool-first fit checker and decision-report layer for multi-SKU arc ferrite magnets workflows. |
| /learn/arc-ferrite-magnet | Singular part-level screening for one geometry decision | Focuses on single-SKU fit execution and immediate RFQ packaging. |
| /learn/arc-ferrite-magnets-suppliers | Supplier qualification and sourcing controls | Prioritizes supplier vetting, QA evidence, and vendor execution risk rather than geometry-first modeling. |
| /learn/arc-ferrite-magnets-company | Company-level capability and program-governance fit | Emphasizes company qualification, process maturity, and release governance. |
Secondary CTA: move from screening to action
If the checker output is directional but not release-ready, request a constrained boundary review before RFQ freeze.
Method, Evidence, And Assumptions
This section exposes how the checker logic is constructed, where data came from, and where uncertainty remains.
Method flow
Deterministic flow: inputs -> derived metrics -> boundary gates -> verdict -> action.
Tool layer assumptions
Uses a narrow motor-screening band within ASTM A1054 scope, plus temperature, air-gap, and retention gates. Method traceability expectations follow ASTM A977 and IEC 60404-5.
Report layer role
Adds source credibility, policy context, and risk controls so users can justify next engineering and procurement actions.
Evidence register
Public sources used in this page. Data uncertainty is shown explicitly instead of hidden.
| ID | Source | Key data | Context | Date |
|---|---|---|---|---|
| S1 | Brave web search snapshot (`arc ferrite magnets` query) | Top 10 snapshot on May 6, 2026 returned 9 supplier/catalog/RFQ-oriented pages and 1 material-explainer page. | Supports tool-first page structure; composition is query-engine and time sensitive. | Query run May 6, 2026 |
| S2 | SDM Magnetics listing page (SERP sample) | Sample listing emphasizes custom arc shape and rotor use, not static SKU-only selection. | Example supplier page used as transactional-intent corroboration, not as standards evidence. | Accessed May 6, 2026 |
| S3 | Eclipse Magnetics ferrite material explainer (SERP sample) | SERP sample includes explanatory page, but dominant query behavior still points to sourcing workflows. | Used as contrast case for mixed-intent handling in one URL. | Accessed May 6, 2026 |
| S4 | ASTM A1054-16(2022) specification for sintered ferrite permanent magnets | Scope states ferrite Br about 0.2 to 0.5 T and HcJ about 160 to 400 kA/m; includes isotropic and anisotropic types and cross-reference to IEC/MMPA designations. | Defines the concept boundary for this checker’s narrower motor-focused screening band. | ASTM page accessed May 6, 2026 |
| S5 | ASTM A977/A977M-07(2020) test method for high-coercivity permanent magnets | States that tests performed on different systems may not yield identical results and requires sensing/calibration method disclosure in reports. | Used to convert “grade-only” claims into method-traceability requirements. | ASTM page accessed May 6, 2026 |
| S6 | IEC 60404-5:2015 permanent magnet measurement standard | Publication date April 16, 2015 (Edition 3.0), stability date 2028; defines methods for magnetic flux density, polarization, field strength, demagnetization and recoil-line measurement. | Anchors cross-supplier comparison to an international method baseline. | IEC page accessed May 6, 2026 |
| S7 | DOE Rare Earth Permanent Magnets Supply Chain Deep Dive Assessment (2022) | States substitution away from NdFeB is difficult with current technology and weaker magnets are not suitable for EVs or wind turbines without significant engineering changes; highlights a “gap magnet” target range around 10-25 MGOe. | Defines non-drop-in boundary for ferrite migration in high-density propulsion contexts. | Published February 24, 2022; accessed May 6, 2026 |
| S8 | IEEE ECCE Europe 2025 paper: ferrite-assisted SynRM for EV propulsion | Reports one high-speed ferrite-assisted SynRM design reaching comparable peak efficiency versus a benchmark Prius 2010 IPMSM with about 28% material-cost reduction. | Provides a counterexample: ferrite can be viable when architecture redesign and validation are done. | Published November 25, 2025; accessed May 6, 2026 |
| S9 | USGS Mineral Commodity Summaries 2026 - Strontium | U.S. net import reliance is 100% (2025e). End-use split includes ceramic ferrite magnets and pyrotechnics/signals at 14% each. | Adds ferrite-specific feedstock risk instead of using rare-earth signals only. | Published February 2026 (MCS 2026); accessed May 6, 2026 |
| S10 | USGS Mineral Commodity Summaries 2026 - Strontium (import-source split) | Import sources (2021-24): total imports Mexico 64%, Germany 31%, other 5%. | Used to quantify concentration exposure for ferrite feedstock planning. | Published February 2026 (MCS 2026); accessed May 6, 2026 |
| S11 | USGS Mineral Commodity Summaries 2026 - Iron Oxide Pigments | U.S. net import reliance was 84% (2025e). End-use explicitly includes ferrites. | Adds non-rare-earth oxide concentration signal relevant to ferrite supply stability. | Published February 2026 (MCS 2026); accessed May 6, 2026 |
| S12 | USGS Mineral Commodity Summaries 2026 - Iron Oxide Pigments (import-source split) | Synthetic pigment import sources (2021-24): China 44%, Germany 30%, Brazil 8%, Canada 6%, other 12%. | Used to quantify regional concentration when planning fallback suppliers. | Published February 2026 (MCS 2026); accessed May 6, 2026 |
| S13 | European Commission C(2023)7088 final (RoHS delegated directive) | Confirms current Annex II list has 10 restricted substances/groups. | Used to keep compliance scope aligned with current RoHS Annex II set. | Issued October 25, 2023; accessed May 6, 2026 |
| S14 | European Commission SWD(2023)760 RoHS evaluation working document | Reiterates homogeneous-material concentration thresholds: 0.1% for most restricted substances and 0.01% for cadmium. | Used to convert directional compliance advice into numeric release gates. | Published December 7, 2023; accessed May 6, 2026 |
| S15 | ECHA news (4 February 2026 Candidate List update) | Candidate List now contains 253 entries; n-hexane is one of the additions dated February 4, 2026. | Provides a dated compliance anchor for SVHC refresh cadence. | Published February 4, 2026; accessed May 6, 2026 |
| S16 | ECHA REACH Article 7(2) notification page | Article notification obligations apply when SVHC content is above 0.1% w/w and total quantity is above 1 tonne/year; deadline is six months after Candidate List inclusion. | Transforms generic SVHC caution into executable notification gates. | Accessed May 6, 2026 |
| S17 | Brave search results for query composition evidence | Top results are predominantly supplier/product-listing pages rather than neutral explainers. | Used for SERP intent distribution table and to avoid anecdotal intent framing. | Query run May 6, 2026 |
| S18 | USGS Mineral Commodity Summaries 2026 - Rare Earths | Net import reliance for U.S. rare-earth compounds/metals is 67% (2025e); import-source split (2021-24) shows China 71%, Malaysia 13%, Japan 5%, Estonia 5%; report records April/October/November 2025 export-control events. | Used to date-stamp policy and concentration risk in magnet-adjacent supply planning. | Published February 2026 (MCS 2026); accessed May 6, 2026 |
| S19 | IEA Global Critical Minerals Outlook 2025 (overview of outlook for key minerals) | In 2035 STEPS, top-three nickel supply reaches 85% (from 75% in 2024); China is projected near 80% of battery-grade graphite and rare-earth refining; N-1 coverage for graphite/rare earths is 35-40%. | Provides disruption-mode counterexample: global base-case balance does not equal resilient supply. | Published 2025; accessed May 6, 2026 |
SERP intent evidence snapshot (May 6, 2026)
Structured first-page snapshot for query composition. Used to verify tool-first priority; SERP mix may vary by region/time.
| Rank | Domain | Page type | Signal | Action |
|---|---|---|---|---|
| 1 | magnet-sdm.com | Supplier product page | Custom arc ferrite product and inquiry framing | Keep tool-first input and RFQ workflow above the fold. |
| 2 | zjjgmagnet.com | Supplier product page | Material basics + product quote path | Show quick checker + decision boundary together. |
| 3 | senmagnetics.com | Catalog/listing page | Dimension/tolerance tables and order framing | Expose parameterized inputs (OD/ID/angle/segment). |
| 4 | mpcomagnetics.com | Supplier product page | Grade list and custom spec framing | Highlight standards-based uncertainty and lot validation. |
| 5 | aomagnet.com | Supplier category page | Arc segment variants plus quote workflow | Provide result-to-RFQ checklist in the same page. |
| 6 | eclipsemagnetics.com | Material explainer | Only major explainer-style result in snapshot | Retain report layer, but keep it below tool section. |
| 7 | topmagnetics.com | Supplier product page | Application-focused sales page | Add clear use/not-use boundaries next to results. |
| 8 | sdmmagnetic.com | Supplier product page | Motor-use and sourcing language | Prioritize procurement-ready next actions in CTA blocks. |
| 9 | dgcourage.com | Supplier landing page | Supplier-first purchase intent | Keep action path visible for inconclusive checker results. |
| 10 | search snapshot aggregate | SERP composition summary | 9/10 results are supplier/catalog/RFQ oriented | Prevent article-first layout drift in future revisions. |
Evidence ID: S17. Snapshot is informational, not a permanent ranking guarantee.
Stage1b gap audit: what changed in this round
This audit tracks prior weak spots, concrete information increments, and remaining uncertainty that is still pending confirmation.
| Gap | Before | Increment added | Remaining uncertainty | Evidence IDs |
|---|---|---|---|---|
| Material-fit claim was previously tied to vendor-style grade tables | The checker band was practical but evidence was not anchored to standards scope and measurement-method caveats. | Reframed with ASTM A1054 envelope boundaries and ASTM A977 / IEC 60404-5 method-traceability requirements. | Lot-level Cpk distribution and full BH trace remain pending confirmation / 暂无可靠公开数据. | S4, S5, S6 |
| Rare-earth-free narrative lacked explicit applicability boundary | Earlier copy implied ferrite advantage but did not clearly separate drop-in substitution from redesign path. | Added DOE substitution-limit signal plus IEEE 2025 ferrite-assisted SynRM counterexample to show where ferrite can work with redesign. | Single-paper outcomes do not guarantee transfer to all rotor/vehicle architectures. | S7, S8 |
| Ferrite supply-risk section relied too much on rare-earth proxy | Supply-risk discussion did not quantify ferrite-relevant feedstock concentration. | Added USGS 2026 strontium and iron-oxide import reliance plus source-concentration figures for ferrite-relevant materials. | Contract-level lead time elasticity is still pending confirmation / 暂无可靠公开数据. | S9, S10, S11, S12 |
| Disruption-mode risk lacked explicit stress-test framing | Base-case supply balance statements were not separated from largest-supplier disruption outcomes. | Added USGS 2025 export-control timeline markers and IEA N-1 coverage numbers (35-40% for graphite/rare-earth in 2035). | Customer-specific demand shock impact still needs internal scenario modeling. | S18, S19 |
| Compliance workflow lacked executable REACH notification gate | SVHC discussion was mostly descriptive and did not state operational trigger conditions. | Added ECHA Feb 4, 2026 update marker (253 entries) and Article 7(2) trigger conditions (0.1% w/w, >1 tonne/year, 6-month deadline). | Supplier lot-level decomposition and notification responsibility mapping remain pending confirmation before SOP. | S13, S14, S15, S16 |
Policy timeline signals with dates
Date-stamped events are translated into executable sourcing actions.
| Date | Signal | Decision impact | Action | Evidence IDs |
|---|---|---|---|---|
| April 2025 | China tightened export controls for selected rare-earth alloys/compounds/metals/oxides. | Programs with broad magnet portfolios can see sourcing-window volatility even when ferrite is the current target path. | Set event-based re-quote trigger and preserve at least one validated alternate source. | S18 |
| October-November 2025 | Rare-earth export-control scope was expanded in October and partially suspended for one year in November while April controls remained in effect. | Policy relief can be partial and temporary; binary “risk off” interpretation can create schedule exposure. | Tie procurement checkpoints to dated policy snapshots instead of annual static assumptions. | S18 |
| 2025e data published February 2026 | USGS ferrite-adjacent feedstocks show high U.S. net import reliance (strontium 100%, iron oxide pigments 84%). | Ferrite migration can still carry raw-material concentration exposure even when rare-earth usage is reduced. | Add feedstock concentration checks and alternate-source validation to ferrite sourcing gates. | S9, S11 |
| 2035 scenario view (published 2025) | In IEA N-1 assessment, graphite/rare-earth remaining supply covers only 35-40% of N-1 demand. | Global balance can look adequate while disruption resilience is still weak. | Add N-1 resilience review as a separate release gate from engineering fit. | S19 |
| February 4, 2026 | ECHA Candidate List moved to 253 entries (including n-hexane), with six-month article-notification deadlines after inclusion. | Compliance packets can go stale mid-RFQ if SVHC refresh cadence is weak. | Set calendar + event-triggered declaration refresh and legal-owner assignment. | S15, S16 |
Compliance thresholds and applicability
Scope and numeric thresholds are separated from unknown items that still require lab or supplier evidence.
| Gate | Requirement | Boundary | Minimum action | Evidence IDs |
|---|---|---|---|---|
| RoHS threshold gate | Apply Annex II concentration limits by homogeneous material for EEE components. | Most restricted substances 0.1% by weight; cadmium 0.01% by weight. | Require supplier declaration plus test method/scope statement before pilot freeze. | S13, S14 |
| Restricted-substance scope gate | Check full Annex II set, including four phthalates, rather than legacy six-substance-only checklists. | Current Annex II scope is 10 restricted substances/groups. | Use checklist templates that explicitly enumerate all 10 restricted entries. | S13, S14 |
| SVHC freshness gate | Treat REACH Candidate List as a moving target with dated review cadence. | Evidence marker: Candidate List moved to 253 entries on February 4, 2026 (includes n-hexane). | Set quarterly minimum declaration refresh and trigger immediate recheck after official updates. | S15, S16 |
| REACH article notification gate | Trigger Article 7(2) workflow when an SVHC in articles is above 0.1% w/w and total quantity is above 1 tonne/year. | Notification due no later than six months after Candidate List inclusion. | Assign legal owner and evidence pack responsibility before supplier release. | S16 |
| Open-data evidence boundary | Do not claim release-ready compliance without lot-level binder/coating evidence. | Public sources do not provide supplier-lot decomposition or fatigue-lifecycle compliance proof for your exact BOM. | Label as pending confirmation / 暂无可靠公开数据 and run targeted lab validation before SOP. | S4, S5, S6, S13, S14 |
Boundary table
Fit/caution/fail windows define how verdict states are assigned and recovered.
| Gate | Fit | Caution | Fail | Minimum action |
|---|---|---|---|---|
| Thermal margin (screening) | >= 30 C | 15 to <30 C | < 15 C | Adjust cooling path, duty, or geometry before lock-in; do not proceed to RFQ freeze. |
| Tip speed at OD | <= 55 m/s | >55 to 75 m/s | > 75 m/s | Increase mechanical retention depth and revalidate adhesive + fixture strategy. |
| Back-EMF gap versus target | |gap| <= 10% | >10% to 18% | > 18% | Re-open pole/geometry assumptions; do not rely on grade-only change. |
| Retention margin | >= 3 MPa | 1.5 to <3 MPa | < 1.5 MPa | Move from adhesive-only to mechanical retention-backed architecture. |
| Demag risk index | <= 40 | >40 to 65 | > 65 | Collect BH loop validation and broaden supplier data before release decision. |
Known vs unknown
Unknown fields are surfaced explicitly to prevent overconfidence.
| Topic | Known | Unknown | Treatment |
|---|---|---|---|
| ASTM envelope vs delivered lot capability | ASTM A1054 defines a broad ferrite envelope (Br about 0.2-0.5 T, HcJ about 160-400 kA/m). | Exact delivered values per supplier lot and whether reported values are measured under comparable methods. | Use conservative band by default and request ASTM A977 / IEC 60404-5 traceable reports before release. |
| Rare-earth-free performance boundary | DOE states substitution away from NdFeB is difficult and weaker magnets are not drop-in suitable for EV/wind without major redesign. | Whether your exact architecture can recover performance through ferrite-assisted redesign. | Keep ferrite path as design option, but validate system efficiency and output via prototype before lock-in. |
| Retention durability lifecycle | Static shear benchmarks exist for adhesive systems. | Long-cycle fatigue performance for the exact rotor surface and process window. | Label as pending confirmation and execute accelerated durability validation. |
| Ferrite feedstock concentration risk | USGS 2026 reports U.S. net import reliance of 100% for strontium and 84% for iron oxide pigments (2025e), with concentrated import sources. | Program-specific lead-time and price response under regional disruptions. | Maintain dual-sourcing, buffer policy, and quarterly procurement stress checks. |
| N-1 disruption sensitivity | IEA 2025 shows that in 2035 N-1 analysis, remaining graphite/rare-earth supply covers only about 35-40% of N-1 demand. | How much of your demand profile remains feasible under N-1 conditions. | Treat N-1 resilience as a separate gate from engineering fit in release reviews. |
| RoHS/REACH legal trigger depth | RoHS thresholds are homogeneous-material based (most 0.1%, cadmium 0.01%), and REACH Article 7(2) notification has explicit 0.1% + 1 tonne/year + 6-month conditions. | Full lab decomposition coverage for each coating/binder layer is often missing at RFQ stage. | Mark as pending confirmation / 暂无可靠公开数据 until supplier test scope and lot trace are delivered. |
| SVHC list drift during long RFQ cycles | ECHA Candidate List records include dated additions such as n-hexane on February 4, 2026. | Which additional SVHC entries may be added before SOP for the exact binder/coating chemistry. | Require quarterly declaration refresh and event-triggered recheck after official list updates. |
Pending-confirmation boundary
Supplier-lot Cpk distribution, full coating/binder layer decomposition, and long-cycle retention fatigue evidence are not reliably available in public datasets. They remain pending confirmation / 暂无可靠公开数据 until project-specific validation is completed.
Comparison And Tradeoffs
Compare ferrite-arc path with nearby options before locking architecture or procurement assumptions.
Material and architecture comparison
Data bands and recommendations are screening-level and must be validated per supplier lot.
| Option | Br band | (BH)max band | Thermal behavior | Cost signal | Use when | Avoid when |
|---|---|---|---|---|---|---|
| Ferrite arc baseline (screening band in this tool) | 0.40-0.45 T | 31-38 kJ/m3 | Can be robust when hotspot margin and retention windows are both controlled | Low to medium | Cost-sensitive motor with moderate magnetic loading and available geometry headroom | Tight package with very high back-EMF target or no architecture-change budget |
| ASTM-envelope lower band path | 0.20-0.40 T | Below tool baseline | Material can be thermally stable but may have limited magnetic reserve | Low unit cost, higher redesign risk | Lower loading targets and relaxed package envelope | High-speed compact rotor with strict output demand |
| NdFeB compact path | Higher than ferrite bands | Much higher than ferrite bands | Needs strict thermal and corrosion controls | Medium to high, with higher policy/price volatility exposure | Compact package and high power-density requirement | Program is dominated by cost and simpler compliance workflows |
| Ferrite-assisted SynRM redesign path | Ferrite-level | Ferrite-level with topology compensation | Can achieve high-speed efficiency if topology and retention are redesigned and validated | Medium (engineering + validation effort) | Need ferrite economics but can invest in rotor/winding redesign and validation loop | No time for redesign or validation loop |
Scenario outcomes
Scenario-based interpretation keeps the checker actionable across real operating contexts.
| Scenario | Input pattern | Likely outcome | Next action |
|---|---|---|---|
| Home HVAC fan baseline | OD72/ID54, arc24deg, 12 segments, 3600 rpm, ambient40C, rise75C, gap0.8mm | Usually fit if thermal margin stays above 30 C and back-EMF gap remains within ±10%. | Package RFQ with tolerance and magnetization-direction details. |
| Automotive radiator fan high ambient | OD84/ID62, 4200 rpm, ambient55C, rise90C, gap1.0mm | Often review-required due to thermal margin compression and retention pressure. | Prioritize cooling-path assumptions and retention architecture before PO timing. |
| Compact high-speed blower | OD66/ID52, 6800 rpm, narrow gap, higher adhesive grade | Tip-speed and demag-risk may trigger not-fit unless geometry or duty is relaxed. | Evaluate geometry resize or NdFeB/hybrid fallback in parallel. |
| Cost-down redesign from rare-earth path | Ferrite migration without winding/system redesign | Back-EMF gap frequently exceeds threshold even if thermal looks acceptable. | Run winding and pole optimization instead of direct material substitution. |
| Single-source plan under policy shock (counterexample) | Engineering fit is acceptable, but procurement assumes one approved source with no timeline buffer | Execution risk can still be high when largest-supplier disruption scenarios are applied; schedule slips may appear even without geometry changes. | Run dual-source qualification and define re-quote trigger points tied to policy updates. |
Risk Register
Decision risk is mapped by probability, impact, trigger, and executable mitigation path.
Risk matrix
Visual priority map for engineering and sourcing teams.
High impact/high probability risks should be converted into release gates, not advisory notes.
Risk details
| Risk | Probability | Impact | Trigger | Mitigation |
|---|---|---|---|---|
| Grade label mismatch across supplier standards | Medium | High | Y30-Y35 declared without full Br/Hcb/Hcj test report and batch statistics | Request BH data with test conditions and accept/reject limits. |
| Thermal demag under real duty | Medium | High | Hotspot or rotor-surface temperature higher than model assumptions in sustained duty | Instrument prototype, validate margin under worst-case ambient and duty cycle. |
| Adhesive-only retention failure at high speed | Low | High | Retention margin below 3 MPa or cure-window/process variability | Add mechanical retention features and process control checkpoints. |
| Policy-driven procurement disruption | Medium | High | Export-control or logistics shock affecting magnet/raw-material flows despite base-case supply comfort | Dual-source strategy, timeline buffers, and periodic re-quote cadence. |
| False confidence from global base-case supply headlines | Medium | High | Program planning uses base-case market balance but ignores N-1 disruption scenarios for graphite/rare-earth pathways | Add N-1 procurement drill at each major gate and keep validated fallback BOM paths. |
| Compliance disclosure gaps | Medium | Medium | Missing RoHS/REACH declarations for coating or binder systems | Make declaration pack a release gate in RFQ checklist. |
Risk disclosure
This page is a screening and decision-support surface. It does not replace full electromagnetic, thermal, mechanical, reliability, and compliance validation.
FAQ By Decision Intent
Grouped FAQ keeps mixed do+know intent actionable across engineering, procurement, and compliance workflows.
Intent Clarification (Do + Know)
Engineering Boundaries
Sourcing, Compliance, And Execution
Related internal pages
Contextual links strengthen discoverability and prevent duplicate route fragmentation.
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Main CTA: send your arc ferrite magnets RFQ package
Include checker result, geometry drawing, tolerance, duty-cycle assumptions, and compliance declarations in one request.
Minimum package: OD/ID/axial length, angle, segment count, magnetization direction, tolerance, and coating/binder details.
If thermal margin is under 30 C, include measured hotspot assumptions and cooling path in the same inquiry.
If back-EMF gap exceeds ±10%, mark it as architecture review required before quote lock.
Attach RoHS/REACH declarations and lot test expectation to avoid late-stage compliance delays.
Minimum continue path when blocked
If inputs or evidence are incomplete, use the smallest executable path: lock conservative assumption band, validate thermal and retention checkpoints, rerun checker, and submit a constrained RFQ.
Need adjacent context before RFQ?