Small rare earth magnets fit tool first, then compact-geometry sourcing decision report.
This route is designed for teams screening miniature rare-earth magnets where compact NdFeB is usually the first pass, but bonded NdFeB and SmCo must stay visible when geometry, temperature, or corrosion constraints tighten. Run the tool first, then validate boundaries, risks, and fallback actions before RFQ lock.
1) Small rare earth magnets fit tool (primary interaction layer)
Input duty conditions and sourcing constraints for small rare earth magnets. The tool returns fit classification, route recommendation, boundary note, and immediate next actions.
No result yet
Run the tool to generate fit classification, grade window, and RFQ action path.
The output includes suitability boundaries and a fallback route when NdFeB is not a safe primary lane.
Reference run for small rare earth magnets: compact latch actuator with 2.5 x 1.2 x 0.8 mm parts, humid assembly handling, and one high-temperature fallback lane held open for reliability review.
- Target flux density: 740 mT
- Max operating temp: 104C
- Peak temp: 136C
- Corrosion exposure: Humid with finger-oil handling during assembly
- Shape complexity: Micro geometry (<3 mm longest side)
- Compliance lane: Industrial launch with optional spare-part channel review
- Shipment lane: Mixed air + surface lanes during pilot and service-kit rollout
- Material decision: Compact NdFeB primary, SmCo fallback kept open above the validated thermal/corrosion window
Observed output: Typical output is "Conditional fit": compact NdFeB can remain the primary lane, but release depends on micro-edge handling controls, small-part/package-field screening, and a still-open SmCo fallback when the validated reserve is too narrow.
Why this matters: The keyword says rare earth, not neodymium alone. This run keeps the tool layer execution-focused while making the NdFeB-versus-SmCo decision boundary explicit before supplier award.
2) Report summary (decision-ready conclusions)
These cards summarize the key decisions, core numbers, and applicability boundaries so teams can align quickly.
Run tool
Confidence is calculated after thermal/corrosion/shape penalties.
Pending result
Adjusted value includes environment, geometry, and compliance penalties before class mapping.
Pending result
Uses max(adjusted peak, adjusted operating + 8C) so sustained-duty risk is not hidden by transient-only checks.
28-53 MGOe
Source: [S11] plus supplier datasets; usable output still depends on load-line, geometry, and temperature.
35%-40% N-1 coverage
Source: [S4], 2035 shock scenario for graphite + rare earth elements. Use contingency lanes before RFQ freeze.
100% U.S. net reliance (2025)
Source: [S2] heavy rare earth chapter. High-temperature programs should disclose Dy/Tb exposure assumptions.
1501 fixture + 50 kG2 mm2 screen
Sources: [S56][S57][S61]. Small-magnet programs should lock channel intent and route selection before RFQ release.
NdFeB 26-52 | bonded 3-12 | SmCo 16-33 MGOe
Sources: [S99][S100][S101]. Use the public supplier windows as orientation only; exact crossover still depends on geometry and working point.
NdFeB loss above 120C still matters
Source: [S102]. Arnold states NdFeB can suffer significant irreversible loss above 120C regardless of binder, so molded routes do not remove the thermal-validation burden.
- Engineering teams defining first-pass material lanes before RFQ.
- Procurement teams that need explicit evidence gates before supplier ranking.
- Programs balancing compact size requirements with thermal and corrosion boundaries.
- Teams expecting universal grade answers without duty-cycle evidence.
- Projects that cannot execute minimum thermal/corrosion validation.
- Cost-only sourcing workflows with no fallback lane definition.
2.5) Stage1b gap audit and information deltas
This audit captures where stage1-primary coverage was thin, what evidence was added in stage1b, and which items still need project-specific confirmation.
| Gap identified | Why it was weak | Stage1b information delta | Current state | Source ref |
|---|---|---|---|---|
| Air-shipment compliance blind spot | Stage1-primary emphasized material fit but did not include the package-level magnetic field threshold that can block aircraft carriage. | Added U.S. air-carriage threshold details, decision implications, and minimum logistics actions in key numbers, policy, and open-gap sections. | Closed for first-pass planning; shipment-level field measurement remains mandatory before booking. | [S19] |
| Consumer safety scope ambiguity | Earlier copy focused on industrial sourcing and did not define when consumer magnet safety rules override pure performance screening. | Added 16 CFR hazard criteria, injury context, and FAQ guidance for consumer-channel scope screening. | Closed for U.S. compliance framing; SKU-level exemption interpretation still requires legal/compliance review. | [S20][S21] |
| Recycling vs concentration tradeoff density | The page discussed concentration risk but lacked a concrete demand-versus-secondary-supply baseline for 2024. | Added IEA demand, secondary supply, and concentration figures plus an explicit inferred-ratio label (~30%). | Partially closed; refresh required with each new IEA data cycle. | [S22] |
| US trigger timing visibility | Policy timing focused mainly on EU lanes and omitted immediate U.S. shipment and consumer-rule triggers. | Extended policy matrix with U.S. transport and consumer-safety triggers, each mapped to executable minimum actions. | Closed as of 2026-02-19; monitor CFR updates for scope changes. | [S19][S20] |
| Small-part geometry threshold was not explicit | Stage1-primary covered generic neodymium boundaries but did not expose the specific small-parts fixture dimensions driving micro-magnet hazard routing. | Added the 16 CFR part 1501 fixture dimensions, linked them to route decisions, and converted size assumptions into explicit launch gates. | Closed as of 2026-02-25; keep size-screening evidence attached to each new geometry revision. | [S56] |
| Toy-vs-subject-product route split was under-defined | Earlier copy did not clearly distinguish toy-route magnet controls from subject-magnet controls for mixed channel or educational claims. | Added CPSC toy guidance and magnet business guidance references, then translated route selection into explicit compliance actions. | Partially closed; route interpretation still requires legal/compliance signoff for each SKU and channel change. | [S57][S61] |
| Micro-kit shipment confidence depended on assumptions | The page discussed transport risk in general but lacked USPS threshold bands that teams use for small consumer-pack shipments. | Added USPS field bands plus codified aircraft prohibition context and tied both to measured package-field release actions. | Closed for first-pass planning; package-level measurements remain mandatory before air-lane booking. | [S58][S59] |
| Recent enforcement signal for small magnetic kits was missing | Without fresh public examples, teams could underestimate marketplace risk for lower-volume small-magnet listings. | Added the 2025 CPSC warning example and embedded channel-control mitigation actions in key numbers, FAQ, and gap-closure guidance. | Partially closed; review CPSC warning/recall updates each quarter to catch new marketplace patterns. | [S60] |
| Rare-earth family split lacked official public numbers | Primary small rare-earth copy kept bonded NdFeB and SmCo visible, but it did not attach vendor-published BHmax, temperature, and corrosion signals that buyers can audit quickly. | Added Dexter NdFeB, bonded NdFeB, and SmCo pages plus Arnold injection-molded NdFeB limits across key numbers, comparison, FAQ, and tool-level callouts. | Closed for first-pass public benchmarking as of 2026-03-27; final family choice still depends on exact geometry and supplier curves. | [S99][S100][S101][S102] |
| Bonded fallback was mentioned without enough route-specific limits | Users could overread bonded NdFeB as a universal micro-part answer because the page did not show epoxy content, no-thread limits, or binder-related thermal caution. | Added bonded-route composition, multipolar/tolerance advantages, no-thread limitation, and the Arnold warning that NdFeB can lose magnetization above 120C regardless of binder. | Partially closed as of 2026-03-27; exact molded-grade and geometry performance still needs supplier-specific proof. | [S100][S102] |
| The page implied a family switch boundary without uncertainty labeling | Earlier content said SmCo should stay open when the compact NdFeB lane tightens, but it did not clarify that no reliable public universal crossover threshold was found for every sub-3 mm part. | Added open-data and boundary language stating that the family handoff must be set from exact geometry, working point, corrosion media, and handling method instead of one generic temperature number. | Still open by design; no reliable public universal crossover threshold was found as of 2026-03-27. | [S99][S100][S101][S102] |
Stage1b evidence refresh completed on 2026-03-27. Re-check small-part fixture screening, toy-versus-subject-product route decisions, package-field shipment thresholds, and CPSC warning updates at each quarterly compliance review.
3) Key numbers and scope boundaries
Numeric claims are disclosed with date markers. Unknown or uncertain items are explicitly labeled to avoid false certainty.
| Metric | Value | Date marker | Decision implication | Source ref |
|---|---|---|---|---|
| U.S. rare-earth concentrate output (REO) | 51,000 t and USD 240M | USGS MCS 2026 chapter, published 2026-02 | Shows domestic output scale but not full self-sufficiency for downstream NdFeB supply chains. | [S1] |
| U.S. imports of RE compounds/metals | +169% volume in 2025; value USD 165M vs USD 168M in 2024 | USGS MCS 2026 chapter, published 2026-02 | Procurement risk is driven by product mix and category shifts, not only by headline import value. | [S1] |
| World rare-earth production estimate | 390,000 t in 2025 | USGS MCS 2026 foreword (published 2026-02) | Global supply expanded, but growth does not remove concentration and policy-shock exposure. | [S3] |
| Heavy rare-earth net import reliance (U.S.) | 100% in 2025 (compounds and metals) | USGS MCS 2026 heavy rare earths chapter, published 2026-02 | High-temperature NdFeB lanes can inherit geopolitical and licensing risks through Dy/Tb exposure. | [S2] |
| Rare-earth demand change in STEPS | +50% to +60% by 2040 | IEA Global Critical Minerals Outlook 2025 | Even moderate scenario growth keeps pressure on magnet-material qualification and sourcing plans. | [S4] |
| China projected refining share (battery-grade graphite + rare earths) | Around 80% in 2035 | IEA Global Critical Minerals Outlook 2025 | Dual-lane sourcing should start before RFQ freeze for high-risk temperature classes. | [S4] |
| N-1 supply coverage for graphite + rare earths | Only 35% to 40% of N-1 demand in 2035 | IEA Global Critical Minerals Outlook 2025 | Single-country disruption can invalidate otherwise "balanced" supply assumptions. | [S4] |
| Salt spray as field-life predictor | Seldom correlates when used as stand-alone data | ASTM B117-26, last updated 2026-01-19 | Do not convert fog-test hours directly into service-life commitments without corroborating evidence. | [S10] |
| U.S. net import reliance (RE compounds/metals) | About 67% in 2025 (down from >90% in 2024) | USGS MCS 2026 Rare Earths chapter, published 2026-02 | Dependence improved versus 2024, but import exposure remains high enough to require dual-lane planning. | [S14] |
| U.S. apparent consumption (RE compounds/metals) | 27,000 t REO in 2025 vs 9,010 t in 2024 | USGS MCS 2026 Rare Earths chapter, published 2026-02 | Demand rebound can compress lead-time buffers if RFQ and validation gating are delayed. | [S14] |
| China share of U.S. RE imports by value | Average 71% (2021-2024) | USGS MCS 2026 Rare Earths chapter, published 2026-02 | Country concentration remains material for NdFeB programs even when domestic mine output increases. | [S14] |
| Rare-earth oxide price dispersion (2025, China market) | NdPr +25% ($55->69/kg), Tb +24% ($812->1,010/kg), Dy -7% ($257->239/kg) | USGS MCS 2026 Rare Earths + Heavy Rare Earths chapters | Do not treat heavy-RE exposure as one blended surcharge; element-specific terms are safer for contracts. | [S14][S15] |
| Chinese permanent-magnet exports | About 58,000 t in 2024 | IEA commentary on export controls, published 2025-12-04 | Short approval delays can rapidly affect downstream inventories when market dependence is high. | [S16] |
| EU strategic benchmark package (CRMA) | 2030 targets: 10% extraction, 40% processing, 25% recycling, <=65% single-country dependency | Regulation (EU) 2024/1252, effective 2024-05-23 | EU-facing RFQs should include origin traceability and recycling disclosure gates before final award. | [S12] |
| Air carriage magnetic-field limit (U.S.) | >0.00525 gauss at 4.5 m from any package surface is forbidden | FAA PackSafe page last updated 2023-03-15; eCFR current to 2026-03-19 | Technical fit alone does not guarantee ship readiness; package-field checks must be part of launch gating. | [S19] |
| U.S. consumer magnet hazard threshold | Hazard criteria include small-part fit plus flux index >=50 kG2 mm2; subject products must stay below 50 | 16 CFR part 1262 current text, accessed 2026-02-19 | Consumer-facing loose-magnet products need compliance screening before using catalog strength claims in go-to-market plans. | [S20] |
| U.S. high-powered magnet injury baseline | Estimated 26,600 emergency-department visits (2010-2021) and 7 reported deaths | 16 CFR part 1262 findings and CPSC final-rule release (2022) | If magnets can become loose parts, safety risk can dominate material-choice logic even when force targets are met. | [S20][S21] |
| Rare-earth demand vs secondary supply (2024, STEPS) | 91 kt demand vs 27 kt secondary supply (~30%, inferred) | IEA rare-earth data page, updated 2025-05-21 | Secondary supply helps but does not replace primary extraction and refining resilience planning. | [S22] |
| Top-three concentration (2024, STEPS) | Mining 86%; refining 97% | IEA rare-earth data page, updated 2025-05-21 | Supplier-count diversification can still mask concentration risk if upstream refining remains highly clustered. | [S22] |
| Small-parts test fixture used in U.S. magnet rules | Cylinder 2.25 in (57.10 mm) long x 1.25 in (31.70 mm) wide | CPSC small-parts guidance (16 CFR part 1501 summary), published 2023-03 | Micro magnets can enter regulated hazard scope by size alone; size-screening should happen before performance claims. | [S56] |
| Subject-magnet applicability timing (U.S.) | 16 CFR part 1262 applies to covered products manufactured after 2022-10-21 | CPSC Magnets Business Guidance updated 2024-03-11 | Legacy compliance assumptions cannot be reused for new builds without confirming manufacture date and channel scope. | [S61] |
| Toy-route magnet boundary (ASTM F963 section 4.38) | Loose magnets in toys that fit the small-parts cylinder must stay below flux index 50; educational toys age 8+ can follow labeled exceptions | CPSC Toy Safety guidance page, accessed 2026-02-25 | Small magnets are not universally banned in toys; age grading, labeling, and intended use change the compliance path. | [S57] |
| USPS magnetic-field shipment bands | <0.002 gauss at 7 ft is non-regulated; >0.00525 gauss at 15 ft is nonmailable by domestic/international air | USPS Publication 52 (June 2025 edition), section 349.42 | Small-magnet kits still need measured package-field evidence; CAD-only prediction is insufficient for air commitments. | [S58] |
| Recent small-magnet enforcement signal | CPSC warning 26-100 cites about 94 magnetic building sets sold (2024-06 to 2025-10) | CPSC warning published 2025-11-20 | Low unit volume does not remove enforcement risk when small powerful magnets enter consumer-facing channels. | [S60] |
| Published sintered NdFeB supplier window | 26-52 MGOe and up to 200C | Dexter NdFeB page modified 2021-02-16; accessed 2026-03-27 | Compact NdFeB remains the force-density baseline, but public supplier data still ties the route to oxidation/coating and temperature-curve validation. | [S99] |
| Published bonded NdFeB supplier window | About 97 vol% Nd-Fe-B + 3 vol% epoxy, 3-12 MGOe, 150C-180C depending on grade | Dexter bonded NdFeB page modified 2020-04-24; accessed 2026-03-27 | Bonded NdFeB is a geometry and magnetization-pattern tool, not a force-density equivalent to sintered NdFeB in the same envelope. | [S100] |
| Published SmCo supplier window | 16-33 MGOe and up to 300C | Dexter SmCo page modified 2017-05-04; accessed 2026-03-27 | SmCo stays relevant when compact parts run out of thermal or corrosion reserve, but cost and handling penalties remain material. | [S101] |
| Injection-molded NdFeB public limit signal | Arnold example 7.15 MGOe at 125C; typical +/-0.003 in/in tolerances; significant irreversible NdFeB loss above 120C regardless of binder | Arnold injection-molded magnets page modified 2021-03-02; accessed 2026-03-27 | Complex micro shapes can justify molded routes, but binder choice does not create a universal high-temperature exemption. | [S102] |
Note: Grade suffix windows shown here are supplier planning conventions. Final qualification always depends on measured magnetic curves, thermal reserve checks, and application-specific validation.
Evidence refresh timestamp for this section: 2026-03-27.
Share your duty profile, shipment lane, and channel assumptions. We will return an RFQ-ready action list with fallback triggers.
3.5) Policy and compliance trigger matrix (neodymium route)
This section adds time-bound regulatory and market triggers that materially change NdFeB procurement decisions for EU-facing and globally exposed programs.
| Trigger | What changed | Timing | Sourcing impact | Minimum action | Source ref |
|---|---|---|---|---|---|
| EU strategic benchmark gate (CRMA Article 5) | EU defines 2030 targets: >=10% extraction, >=40% processing, >=25% recycling, and <=65% single-country dependency. | Regulation in force since 2024-05-23; benchmark horizon is 2030. | EU-bound programs need upstream origin transparency and backup processing lanes earlier in the RFQ cycle. | Request country-of-processing disclosure and contingency sources before price-only negotiations. | [S12] |
| Permanent-magnet label and digital data carrier (CRMA Article 28) | Products containing permanent magnets in covered categories must carry recycler-readable labels and a data carrier. | Delegated act due by 2026-11-24; obligations apply two years after delegated act enters into force. | Packaging and traceability workflows may need redesign if label/data fields are not planned upfront. | Insert label-readiness clauses in supplier agreements and reserve packaging change budget before SOP. | [S13] |
| Recycled-content statement for magnets (CRMA Article 29) | For products with >0.2 kg permanent magnets, recycled-content share for Nd, Dy, Pr, Tb and related elements must be disclosed. | Applies from 2027-05-24 or two years after delegated methodology act, whichever is later. | Quotes without elemental recycled-content accounting can become non-comparable for EU programs. | Add recycled-content traceability fields to RFQ templates and require method disclosure with each quote revision. | [S13] |
| 2025 export-control disruption window | IEA reports licensing restrictions and approval bottlenecks after China export-control tightening in 2025. | Controls announced 2025-04 and extended by 2025-10; approvals remained constrained through 2025-11. | Single-lane NdFeB sourcing can face abrupt lead-time shocks even when nominal capacity exists. | Define trigger-based switch rules (lead time, surcharge, and element exposure) before final supplier award. | [S15][S16] |
| Corrosion test comparability gate | ISO 9227 and IEC 60068-2-11 define controlled salt-mist methods, but they remain comparative screening tools rather than direct field-life predictors. | ISO 9227 published 2022-08; IEC 60068-2-11 updated 2021-06-17; ASTM B117 current revision 2026-01-19. | Quote claims based only on fog-test hours can overstate lifecycle confidence across real media and duty cycles. | Require combined corrosion + thermal-cycle validation criteria in RFQ instead of accepting stand-alone salt-spray hours. | [S10][S17][S18] |
| U.S. air-carriage magnetized-material gate | FAA PackSafe and 49 CFR 173.21(d) align on the aircraft carriage limit of >0.00525 gauss at 4.5 m from any package surface. | FAA page last updated 2023-03-15; eCFR current to 2026-03-19. | High-strength packages can require shielding redesign or route changes even after technical material fit is approved. | Add package-field measurement records to logistics release checklists before air-freight booking. | [S19] |
| U.S. consumer loose-magnet safety gate | 16 CFR part 1262 defines hazardous consumer magnet products by small-part fit and flux index threshold; CPSC attributes major injury burden to this category. | Effective since 2022-10-21; current text accessed 2026-02-19. | Consumer-facing SKUs can fail compliance even when engineering pull-force targets are met. | Screen product scope and flux-index risk before tooling and packaging lock for consumer channels. | [S20][S21] |
| Pending item | Current status | Impact | Minimum action | Source ref |
|---|---|---|---|---|
| CRMA Article 28 magnet-label implementation template | Pending delegated act text (deadline 2026-11-24). As of 2026-02-18, no reliable public final label template is available. | Teams may under-scope packaging, serialization, or data-carrier changes if they wait for late-stage interpretation. | Track Official Journal updates monthly and require suppliers to provide draft label/data payload mapping in advance. | [S13] |
| CRMA Article 29 recycled-content calculation method | Delegated methodology act is due by 2026-05-24; as of 2026-02-18, no reliable public finalized method text is available. | Supplier recycled-content declarations may use inconsistent assumptions, reducing quote comparability. | Ask each supplier for current method assumptions and third-party verification path until EU method is finalized. | [S13] |
| Part-level Dy/Tb intensity for specific commercial grades | No reliable public open dataset; supplier formulas are typically confidential and program-specific. | Element-specific price and export-license exposure can remain hidden until late quote revisions. | Use NDA-backed composition range disclosure and element-indexed surcharge clauses before committing long-horizon POs. | [S15] |
| Carrier-specific acceptance workflow for magnetized packages | No single reliable public cross-carrier template; regulatory thresholds are clear but acceptance workflows vary by route and operator. | Programs can hit late booking friction even after in-house technical and compliance reviews pass. | Collect route-specific carrier checklists and sample package-field evidence before ramp milestones. | [S19] |
Pending labels use explicit status wording when no reliable public implementation text is available as of 2026-03-27.
4) Methodology
The method combines technical feasibility and sourcing execution in one path so output can directly drive next actions.
Step 1 - Convert max and peak temperatures into planning duty
For this neodymium magnets route, the tool adjusts both max operating and peak temperatures, then applies an 8C planning guard band on sustained duty.
Step 2 - Gate against thermal class and flux demand
Planning duty maps to N/AH planning windows while requested flux density screens for sintered, bonded, or fallback routes.
Step 3 - Add coating and validation burden
Corrosion exposure determines coating stack and required validation evidence before RFQ lock.
Step 4 - Produce action path with confidence
The output reports confidence, risk rows, and next actions so teams can move directly into RFQ or fallback planning.
Step 5 - Add micro-geometry and channel-scope gates
For small-magnet routes, the workflow appends small-part fixture screening, toy-versus-subject-product route checks, and measured package-field shipment validation before RFQ lock.
Step 6 - Split the fallback by failure mode
For small rare-earth routes, stage1b now separates geometry-driven bonded NdFeB fallback from temperature/corrosion-driven SmCo fallback so teams do not open the wrong lane first.
Step 7 - Treat public supplier windows as starting points only
The method adds vendor-published NdFeB, bonded NdFeB, and SmCo windows, then explicitly blocks use of any one page as a universal crossover rule for every sub-3 mm geometry.
5) Data sources and evidence trail
Every key conclusion maps to a source and date marker so reviewers can validate or challenge assumptions quickly.
| Ref | Source | Signal used on this page | Date marker |
|---|---|---|---|
| S1 | USGS MCS 2026 - Rare Earths chapter | Reports U.S. REO concentrate output (51,000 t, USD 240M) and import shift (+169% volume; value USD 165M vs USD 168M in 2024). | Published 2026-02 |
| S2 | USGS MCS 2026 - Heavy Rare Earths chapter | Shows U.S. net import reliance at 100% in 2025 and documents 2025 export-control timeline affecting heavy rare earths. | Published 2026-02 |
| S3 | USGS Mineral Commodity Summaries 2026 (foreword) | States world rare-earth production estimate reached 390,000 tons in 2025. | Manuscript approved 2026-02-06 |
| S4 | IEA Global Critical Minerals Outlook 2025 | Rare-earth demand rises 50%-60% by 2040 in STEPS; China around 80% refining share in 2035; N-1 coverage for graphite + rare earths only 35%-40%. | Published 2025 |
| S5 | DOE Critical Materials Assessment 2023 | Executive summary states Nd, Pr, Dy, Tb used in EV motor and wind generator magnets continue to be critical. | Published 2023-07-31 |
| S6 | IEC 60404-5:2015 | Defines measurement methods for magnetic flux density, polarization, field strength, demagnetization curve, and recoil line for permanent magnets. | Publication date 2015-04-16 |
| S7 | IEC 60404-8-1:2023 | Specifies minimum magnetic-property values and dimensional tolerances for magnetically hard materials, including updated REFeB grades. | Publication date 2023-09-20 |
| S8 | IEC 60404-18:2025 | Defines open-circuit superconducting-magnet methods (SCM-VSM and SCM-extraction) and self-demagnetizing-field corrections. | Publication date 2025-02-20 |
| S9 | IEC TR 62518:2009 | Details flux-loss behavior of Nd-Fe-B and SmCo sintered magnets from 50C to 200C for up to 1000 h; explicitly excludes corrosion-coupled stability modeling. | Publication date 2009-03-17 |
| S10 | ASTM B117-26 | Defines salt-spray apparatus as a controlled comparative test and warns that stand-alone correlation to natural environment is seldom reliable. | Last updated 2026-01-19 |
| S11 | Review paper on bonded NdFeB (Journal of Alloys and Compounds 2025) | Notes isotropic bonded NdFeB is often <=16 MGOe while anisotropic bonded routes can approach ~25 MGOe. | Published 2025-07-15 |
| S12 | Regulation (EU) 2024/1252 (CRMA), Article 5 | Sets 2030 EU benchmarks: >=10% extraction, >=40% processing, >=25% recycling, and <=65% single-country dependency at each strategic stage. | Entered into force 2024-05-23 |
| S13 | Regulation (EU) 2024/1252 (CRMA), Articles 28-29 | Defines permanent-magnet labeling/data-carrier obligations and recycled-content statement requirements for Nd, Dy, Pr, Tb and related elements. | Entered into force 2024-05-23 |
| S14 | USGS MCS 2026 - Rare Earths chapter | Reports U.S. 2025 net import reliance at about 67%, consumption at 27,000 t REO, China import share averaging 71% (2021-2024), and NdPr oxide rising from $55/kg to $69/kg in 2025. | Published 2026-02 |
| S15 | USGS MCS 2026 - Heavy Rare Earths chapter | Documents 2025 export-control timeline for seven medium/heavy rare-earth items; terbium oxide increased from $812/kg to $1,010/kg while dysprosium oxide declined from $257/kg to $239/kg. | Published 2026-02 |
| S16 | IEA commentary: China’s export restrictions and strategic responses | Notes roughly 58,000 t Chinese permanent-magnet exports in 2024 and reports 2025 licensing disruptions affecting downstream inventories. | Published 2025-12-04 |
| S17 | ISO 9227:2022 Corrosion tests in artificial atmospheres | Defines NSS/AASS/CASS test methods and warns that salt-spray performance does not translate directly into corrosion behavior in other environments. | Published 2022-08 |
| S18 | IEC 60068-2-11:2021 Environmental testing - Test Ka | Provides an electrotechnical salt-mist test protocol used for comparative corrosion qualification and test reproducibility. | Published 2021-06-17 |
| S19 | FAA PackSafe magnets page + 49 CFR 173.21(d) | States that any package or magnet above 0.00525 gauss at 4.5 m (15 feet) from any package surface cannot fly and points to the codified DOT rule. | FAA page last updated 2023-03-15; accessed 2026-03-22 |
| S20 | eCFR 16 CFR part 1262 - Safety standard for magnets | Defines hazard criteria using small-part fit and flux index >=50 kG2 mm2, with an effective date of 2022-10-21. | Current text (last amended 2023-09-20), accessed 2026-02-19 |
| S21 | CPSC final-rule release for magnet safety | Reports estimated 26,600 emergency-department visits (2010-2021) and seven deaths linked to high-powered magnet ingestion incidents. | Published 2022-09-22 |
| S22 | IEA data: Rare earth elements supply, demand, diversification and policy support | Shows 2024 STEPS values of 91 kt demand, 27 kt secondary supply, and top-three concentration of 86% (mining) and 97% (refining). | Updated 2025-05-21 |
| S56 | CPSC small-parts guidance summary (16 CFR part 1501) | Defines the small-parts fixture used for hazard screening as 2.25 in (57.10 mm) long by 1.25 in (31.70 mm) wide and ties usage to 16 CFR 1501.4. | Published 2023-03 |
| S57 | CPSC Toy Safety guidance (16 CFR part 1250 / ASTM F963 section 4.38) | States that loose magnets in toys that fit the small-parts cylinder must have flux index below 50, with educational-toy exceptions for age 8+ when labeled. | Page accessed 2026-02-25 |
| S58 | USPS Publication 52 section 349.42 (magnetized materials) | Defines transport screening bands: below 0.002 gauss at 7 ft is non-regulated, while above 0.00525 gauss at 15 ft is nonmailable by air. | Publication 52 June 2025 edition page, accessed 2026-02-25 |
| S59 | 49 CFR 173.21(d) aircraft prohibition text | Codifies that magnetic material is forbidden on aircraft when measured field exceeds 0.00525 gauss at 4.6 m (15 ft). | CFR text page accessed 2026-02-25 |
| S60 | CPSC warning notice 26-100 (magnetic building ball-and-stick sets) | Reports roughly 94 units sold online and warns magnets were stronger than permitted for toys, creating ingestion risk of serious injury or death. | Published 2025-11-20 |
| S61 | CPSC Magnets Business Guidance | Defines subject-magnet scope, notes industrial/professional-only exclusion wording, and states applicability to covered products manufactured after 2022-10-21. | Updated 2024-03-11; page accessed 2026-02-25 |
| S99 | Dexter Magnetic Technologies - Neodymium Iron Boron Magnets | Publishes sintered NdFeB as 26-52 MGOe with maximum application temperature up to 200C, while warning the alloy is oxidation-prone, should be coated for humidity/aggressive media, and should not be used as a structural component. | Page modified 2021-02-16; accessed 2026-03-27 |
| S100 | Dexter Magnetic Technologies - Bonded Neodymium Iron Boron | States bonded NdFeB is about 97 vol% magnetic material and 3 vol% epoxy, publishes 3-12 MGOe and 150C-180C depending on grade, highlights isotropic and multipolar pattern flexibility, and notes holes cannot be tapped. | Page modified 2020-04-24; accessed 2026-03-27 |
| S101 | Dexter Magnetic Technologies - Samarium Cobalt Magnets | Publishes SmCo at 16-33 MGOe and up to 300C, describes corrosion resistance as higher than NdFeB, and warns the material can chip easily and is the most expensive permanent magnet material on a per-pound basis. | Page modified 2017-05-04; accessed 2026-03-27 |
| S102 | Arnold Magnetic Technologies - Injection Molded Magnets | States injection-molded magnets can form simple-to-complex shapes with typical tolerances around +/-0.003 in/in, gives an NdFeB example around 7.15 MGOe at 125C, and warns NdFeB suffers significant irreversible magnetic loss above 120C regardless of binder. | Page modified 2021-03-02; accessed 2026-03-27 |
Small rare earth magnets stage1b refs [S12]-[S22] plus [S56]-[S61] and [S99]-[S102] refreshed on 2026-03-27.
6) Concept boundaries and applicability rules
These boundaries are used to prevent over-interpretation of catalog labels and to define where additional evidence is mandatory.
| Boundary | Meaning | Use when | Do not use when | Source ref |
|---|---|---|---|---|
| BHmax headline is not assembly force | Energy-product labels compare material potential, not guaranteed pull force in your magnetic circuit. | Use BHmax as first-pass screening with geometry and load-line assumptions declared. | Do not rank suppliers by BHmax alone when measurement method or working point is undisclosed. | [S6][S7][S8] |
| Grade suffix is a planning shortcut | N/M/H/SH/UH/EH/AH ranges are commonly used in commerce but are not a standalone release criterion. | Use suffix classes for early lane gating before detailed BH-curve and demag checks. | Do not treat suffix labels as universal guarantees across vendors without material test disclosure. | [S6][S7] |
| Salt spray is comparative, not life prediction | Salt-fog testing helps compare coating options in controlled chambers. | Use as a screening gate with replication and clear acceptance criteria. | Do not map salt-spray hours directly to field-life commitments without corroborating long-term exposure data. | [S10] |
| High-temperature NdFeB can raise heavy-RE exposure | Programs near EH/AH lanes can become more sensitive to Dy/Tb availability and export controls. | Trigger dual-lane sourcing and fallback windows before RFQ lock when adjusted peak duty is high. | Do not assume global supply expansion alone removes element-specific licensing or concentration risks. | [S2][S4][S5] |
| Thermal stability data has defined scope | Published stability studies include specific time/temperature windows and may exclude corrosion-coupled behavior. | Use the tested windows (for example 50C to 200C, up to 1000 h) as boundary references only. | Do not extrapolate beyond reported conditions without additional testing for corrosion, duty cycling, and geometry effects. | [S9] |
| Air-shipment eligibility is package-level | Air transport screening uses measured package field at distance, not grade labels or nominal BHmax claims. | Apply before booking aircraft lanes for strong assemblies, kits, or mixed shipments. | Do not assume a magnet is flyable because the material passes engineering performance targets. | [S19] |
| Consumer magnet safety scope is conditional | U.S. 16 CFR part 1262 addresses consumer products containing hazardous loose magnets defined by size and flux index. | Use when end products can release accessible loose magnets in consumer channels. | Do not overgeneralize as a universal industrial exemption; verify product scope and exemptions first. | [S20][S21] |
| Small size does not equal low regulatory risk | A magnet that fits the small-parts fixture can still become a hazardous-magnet candidate when flux index is high. | Use the size screen before finalizing geometry for small consumer-exposed parts or kits. | Do not assume sub-3 mm geometry is automatically low risk without small-parts and flux-index checks. | [S56][S20] |
| Toy and non-toy compliance routes are not interchangeable | Toy rules (ASTM F963 path) and subject-magnet rules (16 CFR part 1262 path) can diverge based on age grading, labeling, and channel intent. | Use when the same small magnet platform could appear in educational, industrial, and consumer-adjacent offerings. | Do not copy one compliance route into another without documenting intended use and distribution controls. | [S57][S61] |
| Micro magnets can still fail air transport | Shipment screening depends on measured package field, and dense multi-piece micro kits can exceed air limits. | Use before committing air-priority samples or marketplace fulfillment routes for small-magnet bundles. | Do not infer air eligibility from part size alone without package-level magnetic-field measurements. | [S58][S59] |
| Small rare earth is a family query, not a release-approved material | Official supplier pages publish materially different public windows for sintered NdFeB, bonded NdFeB, and SmCo, so the search term alone cannot close the family decision. | Use when RFQs, catalogs, or internal briefs start from the generic "small rare earth magnets" query instead of a locked material family. | Do not collapse the page to NdFeB-only or SmCo-only logic until geometry, thermal, corrosion, and handling evidence are frozen. | [S99][S100][S101] |
| Binder does not erase NdFeB thermal sensitivity | Arnold states NdFeB material can suffer significant irreversible magnetic loss above 120C regardless of binder, so molded routes still need grade-specific thermal proof. | Use when bonded or injection-molded NdFeB is proposed because the part is tiny, multipolar, or difficult to machine safely. | Do not assume polymer-bonded NdFeB is automatically the hot-enclosure answer without exact-geometry curves and field validation. | [S102] |
| Geometry fallback and temperature fallback are different decisions | Bonded NdFeB is the geometry/tolerance and magnetization-pattern fallback, while SmCo is the temperature/corrosion fallback with different cost and brittleness penalties. | Use when a compact part fails one part of the NdFeB route and the team needs to know which fallback lane to open first. | Do not open SmCo only because geometry is intricate, or bonded NdFeB only because temperature is high, without matching the fallback to the actual failure mode. | [S100][S101][S102] |
7) Material comparison and tradeoffs
Compare material routes using reproducible dimensions instead of marketing-only descriptors.
| Decision dimension | Sintered NdFeB | Bonded NdFeB | SmCo | Comment | Source ref |
|---|---|---|---|---|---|
| Typical magnetic energy density window | 28-53 MGOe | <=16 MGOe (isotropic), up to ~25 MGOe (anisotropic) | 20-33 MGOe | Values are orientation windows from cited source sets; geometry and working point still shift usable output. | [S11] |
| Planning temperature ceiling | Commercial planning classes often run through AH around 220C (verify by curve and load-line) | Typically lower than sintered due to polymer binder constraints | Used as high-temperature fallback; IEC TR 62518 discusses elevated-temperature stability behavior | Use adjusted peak temperature, not ambient. Final limit must come from vendor curves under your duty profile. | [S9] |
| Shape freedom and manufacturing | Strong but brittle; machining tolerance management is critical | Higher shape freedom for complex and thin-wall geometries | Brittle ceramic-like behavior; machining control required | Shape complexity can justify bonded routes even when peak BHmax is lower. | [S11] |
| Corrosion baseline | Coating usually required (Ni-Cu-Ni, epoxy, or equivalent) | Binder contributes baseline protection but media compatibility must still be verified | Better inherent corrosion behavior in many environments | ASTM B117 / IEC 60068-2-11 are gate checks, not direct life models. | [S10] |
| Supply concentration exposure (2035 view) | High for Nd/Pr, and potentially Dy/Tb in high-temperature coercivity lanes | Still tied to rare-earth feedstock plus binder/process dependencies | Different critical-material exposure profile (includes cobalt) | IEA N-1 analysis shows concentration shock can leave only 35%-40% coverage for rare-earth linked chains. | [S4] |
| Measurement comparability baseline | Require demag curve + recoil line under disclosed method | Request the same measurement family and working-point disclosure | Normalize by same method before ranking across vendors | IEC 60404-5 and IEC 60404-18 describe measurement methods; IEC 60404-8-1 defines minimum property specifications. | [S6][S7][S8] |
| Best-fit program conditions | General high-flux motors, sensors, compact electromechanics | Complex geometry, high-volume molding, lower peak flux density demands | Very high-temperature or severe thermal-cycle duty | Always close loop with demag, corrosion, and thermal evidence before release. | [S5][S9] |
| Logistics and consumer-compliance friction | High-field packages can breach air-carriage thresholds; loose consumer magnet formats need explicit safety screening. | Lower energy density can reduce some package-field pressure, but product-level safety checks still apply. | No automatic exemption; package-field and end-use safety scope must still be verified. | Inference from [S11][S19][S20]: compliance is tested at package/product level, not guaranteed by material family alone. | [S11][S19][S20] |
| Regulatory path changes with intended use | Micro sintered magnets can enter either toy or subject-magnet pathways depending on age grading, labeling, and distribution channel. | Bonded routes may lower field intensity, but intended use and accessibility still control whether toy or subject-magnet requirements apply. | Material substitution does not remove scope checks when products can enter consumer-adjacent channels. | Use [S57][S61] to freeze intended-use claims early; the same micro magnet can face different compliance gates by route. | [S57][S61] |
| Micro kit shipment readiness | Small pieces can aggregate into field-intensive packages that still require measured shipment validation before air commitments. | Lower energy density can help, but package-level field bands and route labels still determine mail/air acceptance. | No automatic shipment exemption; package-field thresholds remain route-level release gates. | Counterexample from [S58][S59]: tiny geometry does not guarantee air eligibility when multi-piece sets are packed together. | [S58][S59] |
| Published compact-family window on official supplier pages | Dexter publishes sintered NdFeB at 26-52 MGOe and up to 200C, but still warns about oxidation, coatings, and non-structural use. | Dexter publishes bonded NdFeB at 3-12 MGOe and 150C-180C depending on grade, while Arnold shows molded NdFeB examples around 7.15 MGOe at 125C with close-tolerance molding. | Dexter publishes SmCo at 16-33 MGOe and up to 300C with stronger corrosion resistance than NdFeB. | Use these as official public windows, not universal crossover rules for every micro geometry. | [S99][S100][S101][S102] |
| What each fallback actually solves in tiny parts | Keep sintered NdFeB first when the compact envelope needs the highest force density and edge handling can be controlled. | Use bonded NdFeB when intricate shapes, multipole patterns, or mold-repeatability are the primary blockers rather than raw thermal reserve. | Use SmCo when validated temperature or corrosion reserve is the blocker and the project can absorb cost plus brittle-handling burden. | Do not treat bonded NdFeB and SmCo as interchangeable "non-sintered" fallbacks. | [S100][S101][S102] |
| Micro-part assembly and retention limitations | Public supplier guidance says sintered NdFeB should not be used as a structural component, and micro edges remain damage-sensitive. | Bonded routes improve shape freedom, but supplier guidance still says threaded holes are not supported and tapped holes are not allowed. | SmCo improves thermal and corrosion margin, yet public supplier guidance still describes the material as chip-prone and unsuitable as a structural component. | Material-family changes do not remove fixture, retention, or reject-criteria work in micro assemblies. | [S99][S100][S101] |
8) Risk matrix and mitigation
Misuse risk, cost risk, and scenario mismatch risk are shown together so the team can sequence mitigation actions.
| Risk | Probability | Impact | Mitigation |
|---|---|---|---|
| Thermal misclassification versus real hotspot duty | Low | Medium | Recalculate adjusted operating + peak duty with measured cycle data and confirm class with demag-curve checks before PO. |
| Coating-lifecycle mismatch under real media exposure | Medium | Medium | Map media profile to explicit corrosion + thermal-cycle tests and define pass/fail criteria up front. |
| Supplier data non-comparability (test method mismatch) | Medium | Medium | Require method disclosure (IEC 60404 family) and normalize working points before ranking quotes. |
| High-temperature lane heavy-rare-earth exposure | Medium | Medium | When adjusted duty approaches EH/AH lanes, request Dy/Tb exposure disclosure and define export-control fallback triggers before award. |
| Supply concentration shock during launch window | High | Medium | Maintain contingency lane and pre-define switch triggers for temperature, lead time, and cost tolerance. |
| Air-lane rejection despite technical material fit | Medium | Medium | Measure shipment-ready package fields before booking, prepare shielding iterations, and pre-authorize a surface-transport fallback workflow. |
| Consumer-channel compliance mismatch | Low | Medium | Before release, confirm whether the SKU enters consumer magnet scope, then align flux-index testing, warnings, and channel restrictions. |
9) Open evidence gaps and minimum closure path
Where public evidence is incomplete, this page does not force a hard conclusion. Each gap includes a minimal executable closure action.
| Evidence gap | Current status | Decision impact | Minimum closure action | Source ref |
|---|---|---|---|---|
| Cross-supplier suffix mapping to guaranteed demag margin | No single public standard mapping N/M/H/SH/UH/EH/AH suffix labels to guaranteed in-application demag reserve. | Quote comparisons can look equivalent while actual thermal headroom differs by method and working point. | Request vendor-specific BH curves, recoil data, and temperature conditions before release decisions. | [S6][S7] |
| Salt-spray hours to field-life conversion | No reliable universal conversion model in open standards; ASTM B117 warns stand-alone correlation is seldom robust. | Warranty and lifecycle assumptions can be overstated if fog-hour data is treated as direct service-life evidence. | Pair chamber tests with application-specific thermal/media cycling and clearly documented acceptance criteria. | [S10] |
| Corrosion-coupled high-temperature flux-loss dataset for each coating stack | Public IEC thermal-stability report excludes corrosion-coupled behavior modeling for full lifecycle prediction. | High-temperature and aggressive-media programs may underestimate long-term drift and reserve loss. | Run combined thermal + corrosion + load-line validation for each candidate stack before final PO. | [S9] |
| Program-specific heavy-rare-earth exposure breakdown | Public macro data confirms concentration risk, but part-level Dy/Tb intensity is typically supplier-confidential. | Lead-time and export-license risk can remain hidden until late sourcing stages. | Add material disclosure checkpoints and contingency triggers in RFQ templates. | [S2][S4] |
| Package-field prediction from CAD/BHmax alone | No reliable universal public model converts part-level grade and geometry into certified package-field outcomes at transport distance. | Teams can discover non-compliant shipping configurations late, after packaging design and launch schedules are locked. | Run measured package-field checks on shipment-ready units and reserve shielding iteration time before booking. | [S19] |
| Public flux-index benchmark by micro geometry and coating stack | No reliable public cross-supplier dataset normalizes flux-index distribution for sub-3 mm magnets across coating stacks and tolerance classes. | Teams can under- or over-specify micro magnets when they infer hazard margin from one sample lot or one supplier table. | Require lot-level flux-index evidence in incoming QC and keep intended-use/channel documentation tied to each SKU revision. | [S57][S61] |
| Universal package-field model for multi-piece micro kits | No reliable public model converts part count, spacing, and package layout into guaranteed air-lane field outcomes for every carrier workflow. | Air-commitment plans can fail late when shipment-ready packages exceed route thresholds despite passing part-level checks. | Run measured package-field tests on final packout, version results by packaging revision, and maintain surface-route fallback triggers. | [S58][S59] |
| Universal NdFeB-to-SmCo crossover temperature for sub-3 mm parts | No reliable public standard or official vendor source on this page gives one universal handoff temperature for every small rare-earth part; published supplier windows overlap by process, geometry, binder, and duty context. | Teams can overuse a fixed 120C or 150C rule and open the wrong fallback lane too early or too late. | Define family-switch triggers from exact geometry, working point, corrosion media, and supplier-specific BH curves instead of one generic temperature threshold. | [S99][S100][S101][S102] |
| Matched public force data for one micro geometry across sintered, bonded, and SmCo | No reliable public source found on this page publishes identical-geometry pull-force or flux results for the same sub-3 mm part across all three families. | BHmax windows alone can misstate the real tradeoff between force density, tolerance, cost, and fallback burden. | Request identical-geometry prototype data or magnetic-circuit simulation for every candidate family before closing the rare-earth decision. | [S99][S100][S101][S102] |
Labeling policy: when reliable public data is insufficient, status is marked as "no reliable public data" and converted into a validation task instead of a forced conclusion.
10) Scenario examples
Each scenario includes assumptions, tool outcome, and minimum executable next step.
Assumptions
Peak 145C, humid but sealed enclosure, target flux 820 mT, annual volume 120k.
Outcome
Fit: SH/UH sintered NdFeB lane with epoxy-over-Ni coating and standard validation depth.
Next step
Proceed with NdFeB primary lane and run salt-mist + thermal cycle validation before pilot freeze.
Assumptions
Peak 198C, coolant splash exposure, target flux 960 mT, annual volume 45k, automotive compliance.
Outcome
Conditional: EH/AH planning window with tighter demag reserve checks and contingency lane recommendation.
Next step
Open parallel SmCo contingency lane until demag and corrosion evidence both pass program criteria.
Assumptions
Peak 238C, high corrosion medium, target flux 680 mT, low annual volume, medical-grade audit controls.
Outcome
Not fit: adjusted thermal duty exceeds AH planning envelope for NdFeB.
Next step
Prioritize SmCo fallback or architecture redesign before spending cycle budget on high-risk NdFeB trials.
Assumptions
Peak 172C, humid industrial floor, target flux 910 mT, annual volume 80k, products destined for EU compliance lanes.
Outcome
Conditional: NdFeB is technically feasible but procurement path is gated by CRMA traceability and recycled-content disclosure readiness.
Next step
Hold dual-source lane and lock supplier traceability payload (origin + recycled content assumptions) before line-freeze milestone.
Assumptions
2 x 1 x 0.5 mm magnets, peak 118C, target flux 700 mT, humid hand-assembly line, and strictly industrial distribution in phase 1.
Outcome
Conditional: technical fit is feasible, but release confidence depends on lot-level flux-index evidence, edge/chip handling controls, and shipment-ready package-field measurements.
Next step
Freeze channel lock in contracts, collect lot-level magnetic data, and clear package-field checks before approving air-priority sample lanes.
Assumptions
Same small magnet geometry repackaged into a consumer-facing repair kit with mixed third-party seller distribution.
Outcome
Not fit for open launch until toy/scope pathway is confirmed and hazard thresholds are validated for the selected route.
Next step
Run toy-versus-subject-product scope review, align age/labelling claims, and block listings until route-specific evidence closes.
Assumptions
2.8 mm micro part, multipole requirement, peak 95C, humid hand assembly, and annual volume above 100k units.
Outcome
Conditional leaning toward bonded NdFeB: geometry and magnetization-pattern control are the first blockers, while temperature remains inside a range where SmCo may be unnecessary overhead.
Next step
Request molded/bonded quotes with identical-geometry field maps and tolerance evidence, but keep a sintered backup lane open until force-density targets are confirmed.
Assumptions
Micro geometry stays fixed, sustained duty reaches 132C with 155C peaks, humidity remains present, and the design cannot grow in volume.
Outcome
Conditional leaning toward SmCo fallback: bonded NdFeB may help geometry, but it does not automatically solve the thermal-reserve problem in the same package.
Next step
Open SmCo and high-temperature NdFeB lanes in parallel, then close the family decision only after exact-geometry curves and corrosion-coupled validation are reviewed.
11) FAQ (decision-focused)
Questions are grouped by decision intent so teams can move from explanation to execution.
12) Next action
Share your duty profile and we will return a material-lane recommendation with grade window, coating strategy, validation checklist, and RFQ normalization notes.
Product Gallery
High-grade disc magnets
Specifications
| Primary screening lane | Compact rare-earth parts under micro geometry, humidity, shipment, and handling constraints |
| Default material route | Sintered NdFeB remains the first-pass route for force density; bonded NdFeB and SmCo stay open when geometry or duty boundaries tighten |
| Critical release controls | Small-part scope, edge/chip management, coating integrity, and shipment-ready package-field evidence |
| Tool output payload | Fit band, confidence score, grade window, boundary note, and next-step actions for engineering and sourcing handoff |
| Fallback trigger | Escalate to SmCo when adjusted duty temperature or corrosion risk exceeds the compact NdFeB lane with acceptable reserve |
Need a quote-ready specification review?
Share your drawing, grade target, coating, and quantity. We align supplier feasibility before full RFQ submission.
Reference Guides
Procurement-ready guides covering grades, coatings, QC, and RFQ prep.
Coatings & Corrosion
Corrosion protection for rare earth magnets
Environment-based guidance for selecting coatings and corrosion controls.
Manufacturing & Quality
Inspection and testing for NdFeB magnets
How to define inspection scope, measurement methods, and acceptable criteria.
Sourcing & Logistics
Magnet storage and handling safety
Storage, handling, and packaging guidance to avoid chipping, demagnetization, and injury.
Case studies
HVAC - Linear actuator assemblies
Block Magnets for HVAC Linear Actuator Production Line
Scaling from 500 to 10,000 pcs/month of N35 block magnets for HVAC damper actuators while reducing unit cost by 18%.
Subsea / Marine - Magnetic coupling for ROV thrusters
Magnetic Assembly for Underwater ROV Thruster Coupling
Custom magnetic coupling assembly using N42 NdFeB ring magnets with epoxy coating for subsea ROV thruster applications.
Quote Calculator
Estimate lead time and prepare a precise RFQ.
Buyer feedback
Recent RFQ and sourcing coordination highlights.
The RFQ response included grade and coating options with clear lead times.
Marcus Reed
Procurement Manager - EV Motor OEM
Drawing review was fast and the quote matched our tolerance targets.
Ana Soto
Sourcing Lead - Industrial Automation
Inspection data and material declarations were available when requested.
Ravi Menon
Quality Engineer - Appliance Supplier
Trusted by buyer segments
OEM and industrial teams sourcing NdFeB and SmCo magnets.
Request a Quote
RFQ checklist
- Dimensions and shape (include drawing if possible).
- Grade and operating temperature range.
- Coating or surface treatment requirements.
- Quantity, target price, and delivery schedule.
- Tolerance, magnetization direction, and application notes.
Spec sheet downloads
Reference assets to speed up RFQ prep. Confirm specs before ordering.
NdFeB spec sheet (reference)
Grades, coatings, and RFQ checklist for NdFeB magnets.
SmCo spec sheet (reference)
High-temperature SmCo summary and RFQ checklist.
Ferrite spec sheet (reference)
Cost-optimized ferrite basics and RFQ checklist.
Alnico spec sheet (reference)
High-temperature Alnico grades and RFQ checklist.
Bonded NdFeB spec sheet (reference)
Bonded NdFeB process notes and RFQ checklist.
Flexible rubber magnet spec sheet (reference)
Flexible magnet tape basics and RFQ checklist.
Magnetic assembly spec sheet (reference)
Pot magnet assembly fundamentals and RFQ checklist.
Trust & Compliance
Certifications and QC checkpoints aligned to industrial procurement.
ISO 9001
Quality management system
RoHS
Restricted substances compliance
REACH
SVHC compliance on request
Factory Capability
- Custom shapes and grades per drawing
- Tolerances confirmed by supplier QC
- Coating options: Ni-Cu-Ni, Zinc, Epoxy
QC Process
- Raw material verification and grade checks
- Dimensional inspection to critical tolerances
- Surface and coating integrity inspection
Get a Quote
Send your drawing, grade, coating, and quantity. We coordinate a supplier quote and follow up with confirmed specs.
Product data is sourced from partner suppliers and confirmed per order.
Related Pages
Small Neodymium Magnets: Tool-First Fit and Sourcing Decision Report
Product
Tiny Neodymium Magnets: Tool-First Fit and Sourcing Decision Report
Product
Samarium Cobalt Magnets Fit Tool and Sourcing Report
Product
Rare Earth Magnets vs Neodymium: What Buyers Actually Need to Compare
Comparison
Neodymium Magnets: Fit Tool and Procurement Decision Report
Product
NdFeB Magnet Grades: Selector Tool and Evidence Report
Educational
Custom Neodymium Magnets for OEM RFQ
Sourcing
Where to Buy Neodymium Magnets: Tool-First Supplier Decision Page
Product