Hybrid Tool + Report
Start with the checker to get an immediate supplier-path signal, then use the report layers to verify what is known, what is uncertain, and what action should happen next. This page is built as one URL by design: tool completion first, evidence and risk decisions second.
Score whether your dual-ratio sourcing constraints are RFQ-ready, compare region baselines, and identify the next executable action.
No result yet.
Run the checker to get supplier-path recommendation, readiness score, and RFQ next action.
Users expect a runnable checker first, then boundary logic, risks, and evidence quality before RFQ lock.
The same ratio pair can map to different supplier paths depending on shift frequency, duty profile, and verification depth.
This page treats low ratio 0.95-1.15 and high ratio 4.0-5.5 as strict go bands, while wider windows remain directional only.
Programs with tight deadlines, high shift cycles, or certification constraints need sample traces and certificate-status checks before award.
Single-point promises without baseline offsets can hide launch risk even if unit price appears competitive, especially when trade terms are not normalized.
Certification evidence needs recognized-body and live-status verification, and EU machinery obligations have a concrete regulation transition date.
Unknown values are explicitly marked and converted into actions: what to request, what to test, and what to defer.
| Audience | Suitable | Why |
|---|---|---|
| OEM or integrator evaluating two-speed suppliers before RFQ | Yes | Tool output maps directly to supplier-path and evidence requirements. |
| Team needing strict go/no-go around dual-ratio boundaries | Yes | Page provides strict bands and boundary-state handling near the result. |
| User seeking fully finalized gearbox design sign-off | No | This page is a screening gate, not a substitute for endurance and validation testing. |
| Procurement workflow without defined shift duty profile | Partially | Use the checker, but first create a minimum shift-duty template to avoid false ranking. |
| Metric | Value | Decision meaning | Source |
|---|---|---|---|
| Route intent split | do_score 0.500, know_score 0.500 | Confirms this page must deliver both immediate tool output and deep decision support. | Intent-router input (this change) |
| Strict low-ratio decision band | 0.95 to 1.15 | Outside this band, low-ratio conclusions stay in review mode. | Page methodology rule |
| Strict high-ratio decision band | 4.0 to 5.5 | Keeps final go/no-go aligned to typical two-speed industrial paths. | Page methodology rule |
| Catalog two-speed baseline (tool model) | 8-14 week mass lead-time, up to ~40 shifts/hour | Good for lower-complexity programs with moderate shift duty. | Internal heuristic model (explicitly non-universal) |
| Synchronized OEM baseline (tool model) | 10-18 week mass lead-time, up to ~90 shifts/hour | Targeted for higher cycle duty with stronger evidence needs. | Internal heuristic model (explicitly non-universal) |
| Program OEM baseline (tool model) | 14-26 week mass lead-time, up to ~180 shifts/hour | Used when certification, traceability, or endurance evidence is strict. | Internal heuristic model (explicitly non-universal) |
| Redex RAM-MSD published ratio range | 1:1 and about 5:1 | Public vendor data supports the practical dual-ratio framing used in this page. | Redex RAM-MSD product page |
| Redex RAM-MSD published output capability | Up to 3500 Nm, efficiency listed as 97% | Shows that two-speed offerings can include high-torque and high-efficiency claims. | Redex RAM-MSD product page |
| Dana 2-speed e-gearbox positioning | Low-range launch torque + synchronized shift statements | Highlights that shift quality and launch behavior are part of manufacturer selection. | Dana 2-speed e-gearbox page |
| IATF certificate gate | Only recognized certification bodies are authorized for IATF 16949 activity | Certificate legitimacy must be checked beyond PDF collection. | IATF under-contract certification bodies page |
| IATF interpretation update cadence | IATF FAQ 30-31 and SI 27-30 were issued/effective in Nov 2025 | Requirement interpretation evolves, so RFQ assumptions should pin a rule/FAQ revision date. | IATF FAQ and SI update pages |
| IAF CertSearch status categories | Active / Suspended / Withdrawn / Expired | Supplier certificate status should be treated as a live risk input. | IAF CertSearch status guide |
| IAF public visibility boundary | Inactive and cancelled statuses are not publicly searchable in IAF CertSearch | "Not found" can be a status signal; screenshot-only evidence is not enough. | IAF status glossary page |
| ISO 6336 scope reminder | Rating-method scope is bounded; not full assembled-system approval | Prevents misuse of standards as blanket acceptance evidence. | ISO 6336-1:2019 standard page |
| ISO 6336 validated range details | Pressure angle 15-25 deg, helix 0-30 deg, contact ratio 1.0-2.5 (confirmed in 2025 review) | Outside these bands, the source itself requires experience-based confirmation instead of auto-acceptance. | ISO 6336-1:2019 standard page |
| Logistics variance context | World Bank LPI 2023: average maritime journey 44 days, std. dev. 10.5 days | Lead-time plans should include scenario buffers instead of single-point assumptions. | World Bank LPI 2023 release |
| Incoterms 2020 insurance boundary | CIF default insurance is ICC C clauses, while CIP default is ICC A clauses | Quote comparisons are distorted when terms differ, even if unit price looks identical. | ICC Incoterms 2020 key changes page |
| EU machinery regulation transition | Regulation (EU) 2023/1230 applies from 20 Jan 2027; Directive 2006/42/EC applies until then | Program launch date changes which compliance evidence is mandatory in the EU market. | European Commission machinery regulation page |
| Flender NAVILUS published envelope | 2-speed units with up to 105,000 Nm output torque and ratios up to 12 | Public marine references show two-speed programs can exceed typical spindle-scale assumptions. | Flender NAVILUS 2-speed page |
| Dana 2-speed e-gearbox published envelope | Approx. 550 Nm continuous motor torque and up to 3320 Nm output torque | Traction-focused two-speed architectures prioritize launch torque and synchronized-shift behavior. | Dana 2-speed e-gearbox page |
| Concept | Applies when | Not enough when | Minimum action |
|---|---|---|---|
| ISO 6336 load-capacity rating | Evaluating spur/helical gear-tooth load capacity within the validated geometry envelope. | Claiming full assembled-gearbox approval for NVH, thermal, shift quality, or complete system durability. | Use ISO 6336 output as one input, then add system-level validation gates in RFQ. |
| IATF 16949 certificate evidence | Certificates are issued by a recognized IATF certification body and status is currently active. | A PDF screenshot is used without recognized-body check and live status verification. | Verify recognized CB coverage first, then confirm certificate status in a live registry. |
| IAF CertSearch status signals | Status is active/suspended/withdrawn/expired and checked on the retrieval date. | Inactive/cancelled absence is interpreted as "safe" without further evidence. | Capture retrieval date, status, and follow-up request for missing/non-public records. |
| Incoterms 2020 quote governance | Comparing delivery risk/cost responsibility using the same term and year version. | Comparing supplier prices across mixed rules (e.g., FOB vs DDP, CIF vs CIP) as if equivalent. | Lock one term set in RFQ and normalize insurance/document obligations before ranking. |
| EU machinery compliance timing | Project schedule explicitly maps to Directive 2006/42/EC (before 2027-01-20) or Regulation (EU) 2023/1230 (on/after 2027-01-20). | Supplier "CE-ready" claims are accepted without timing-specific legal basis. | Put planned market-entry date and legal regime in the compliance checklist before award. |
| Decision | Upside | Risk | Counterexample | Mitigation |
|---|---|---|---|---|
| Pick catalog path to shorten lead-time | Faster RFQ cycle and lower early engineering overhead. | Shift-duty endurance may be under-defined for high-cycle or shock profiles. | Ratio fits looked good, but shortlist failed after endurance evidence request. | Add shift-cycle matrix and thermal acceptance gates before final supplier ranking. |
| Accept lowest unit price across mixed Incoterms | Appears cheapest on first-pass quote table. | Insurance coverage and risk transfer points are not equivalent, so landed-risk cost is hidden. | CIF offer looked cheaper than CIP but had weaker default insurance coverage. | Normalize to one Incoterms 2020 rule and compare total landed program cost. |
| Treat certification PDF as sufficient | Faster document collection and simpler audit folder. | Status drift (suspended/withdrawn/expired) can remain invisible at decision time. | Certificate file looked valid, but live status check showed non-active state. | Require recognized-body validation and live status capture with date stamps. |
| Reuse legacy EU compliance checklist for post-2027 launch | Less upfront compliance rework in the planning phase. | Wrong legal framework can delay approval or trigger redesign late in the timeline. | Project planned under Directive 2006/42/EC but SOP date moved into Regulation 2023/1230 window. | Freeze market-entry date and legal regime early, then align evidence pack accordingly. |
| Path | Typical trigger | Lead-time baseline | Evidence depth | Primary risk |
|---|---|---|---|---|
| Catalog 2-speed path | Moderate cycles, baseline quality pack, no strict certification lock | 8-14 weeks (before regional offsets) | Datasheet + dimensional checks | Shift endurance uncertainty under high-cycle duty |
| Synchronized OEM path | Higher cycle duty, pneumatic/hydraulic shift branch, PPAP-lite requirement | 10-18 weeks (before regional offsets) | Sample plan + process evidence | Mid-program timeline slip if shift validation starts late |
| Program OEM path | IATF / full trace / synchronized e-shift or high-risk application | 14-26 weeks (before regional offsets) | Traceability, certificate checks, endurance gates | Higher upfront integration and compliance workload |
The page first resolves operational fit, then evaluates evidence depth and risk pressure, and finally maps the outcome to an executable procurement action.
Boundary states are intentional. They prevent overconfident ranking when ratio, cycle-duty, or evidence constraints are not yet stable.
| Step | Logic | Output |
|---|---|---|
| Input normalization | Parse ratio, torque, shift cycles, duty, volume, and timeline fields with explicit numeric boundaries. | Valid input envelope or recoverable boundary/error state |
| Supplier-path routing | Map constraints to catalog/synchronized/program paths by actuation, risk, and evidence requirements. | Initial path selection and baseline windows |
| Readiness scoring | Blend ratio-fit, torque-fit, shift-duty pressure, lead-time pressure, and evidence depth. | Readiness score + risk level + suggested supplier count |
| Boundary governance | Force review/no-go when strict ratio band, shift-cycle, or certification compatibility fails. | Decision state with explicit next action |
| Action mapping | Translate result status into executable RFQ path and minimum evidence checklist. | Actionable CTA instead of static score-only output |
| Input pattern | Tool output pattern | Decision action |
|---|---|---|
| High ratio 6.8 with synchronized shift | Review or no-go unless program path evidence is available | Escalate supplier tier before pricing comparison |
| Shift cycles 120/hour with tight sample deadline | Boundary pressure with elevated risk score | Require endurance plan and reset delivery assumptions |
| IATF required but catalog path suggested by manual override | No-go compatibility rule triggered | Move to program path with recognized CB checks |
| Ratios within strict bands and moderate cycle duty | Go with 3-supplier shortlist guidance | Start normalized RFQ and sample checkpoints |
If the result remains in review/no-go, lock a normalized RFQ template before supplier ranking to prevent mixed-context decisions.
Each risk item is mapped to a mitigation path so the page remains decision-active rather than descriptive only.
| Risk | Probability | Impact | Mitigation |
|---|---|---|---|
| Misaligned ratio map between low and high gears | Medium | High | Lock strict low/high ratio targets before supplier ranking and keep tolerance window in RFQ template. |
| Shift-cycle requirement exceeds selected supplier path | Medium | High | Request shift endurance matrix and define acceptance cycle count before nomination. |
| Certificate screenshot accepted without status verification | Medium | High | Verify active/suspended/withdrawn status through recognized channels before award. |
| Lead-time quote ignores logistics variance and customs reality | High | Medium | Apply regional offsets and scenario buffers in sourcing plan; avoid single-point schedules. |
| Standards cited as blanket approval outside scope | Medium | Medium | Use standards as boundary input only; retain system-level validation for final release. |
| Unknown values hidden instead of disclosed | Medium | Medium | Mark unknown as N/A with reason and define minimum executable next-step request. |
| Gap | Issue | Enhancement | Status |
|---|---|---|---|
| Evidence base was still vendor-heavy for several decision claims | Core sections relied on product pages and internal heuristics, but lacked enough regulator/standards anchors for compliance-critical decisions. | Added standards/regulator facts (ISO, IATF, IAF, EU machinery regulation, ICC, World Bank) and mapped each to explicit decision impact. | Closed (2026-05-26) |
| Concept boundaries were not explicit enough | Users could misread ISO 6336 or certificate artifacts as full-system approval evidence. | Added concept-boundary table with apply/not-apply conditions and minimum verification actions. | Closed (2026-05-26) |
| Trade-term risk was present but not operationalized | Quote comparison could still ignore Incoterms insurance and risk-transfer differences. | Added counterexample-driven trade-off matrix with Incoterms 2020 normalization action. | Closed (2026-05-26) |
| Compliance timing window was under-specified | EU launch timeline can change required legal basis, but the page did not call out the 2027 switch clearly. | Added explicit Directive 2006/42/EC to Regulation (EU) 2023/1230 transition boundary and decision usage. | Closed (2026-05-26) |
| Certificate-status drift risk was not granular enough | A certificate snapshot could look valid while registry status changed or became non-public. | Added IAF status visibility nuance and live-status verification requirement in multiple decision tables. | Closed (2026-05-26) |
| Severity | Finding | Fix action | Result |
|---|---|---|---|
| blocker | Route returned 404 because this slug was missing in proxy learn-route allowlist. | Added `2-speed-gearbox-manufacturers` into KNOWN_LEARN_SLUGS in src/proxy.ts. | Closed (2026-05-26) |
| high | One source in the evidence table returned HTTP 403 and weakened traceability. | Replaced the blocked directory source with an accessible manufacturer-listing reference. | Closed (2026-05-26) |
| medium | Action mapping and score interpretation still rely on reader scanning long tables. | Kept action-first table and RFQ CTA near result card; no additional structural changes in this round. | Accepted for current release |
| low | Minor copy tightening opportunities remain in section labels. | Deferred to the SEO/GEO closeout pass for unified copy polish. | Accepted for current release |
| Topic | Known | Unknown | Minimum executable path |
|---|---|---|---|
| Public cross-vendor shift-life benchmarks | Individual vendors publish architecture features and selected metrics. | No universal, open, apples-to-apples shift-life dataset across suppliers. | Collect supplier-specific endurance matrix and test boundary definitions in RFQ package. |
| Direct cost deltas between supplier tiers | Higher evidence and compliance depth generally extends program effort. | Public pricing comparability is limited due to confidential configuration scope. | Use normalized BOM/risk template and compare total landed program cost rather than unit price only. |
| Cycle-duty derating under extreme ambient profiles | Vendors emphasize architecture and efficiency envelopes. | Cross-brand thermal-derating curves are rarely public at comparable granularity. | Require temperature-duty validation plan and acceptance criteria before final award. |
| Cross-market regulatory evidence mapping | Public pages identify legal framework transitions and non-recognized certificate warnings. | Supplier-specific evidence packs are usually not public, so market-by-market conformity depth cannot be benchmarked openly. | Build a dated compliance matrix per target market and request evidence ownership map before nomination. |
| Scenario | Assumptions | Tool/report outcome | Next step |
|---|---|---|---|
| Machine-tool spindle retrofit | Low ratio ~1:1, high ratio ~5:1, 25 shifts/hour, moderate duty, ISO 9001 required. | Typically routes to synchronized OEM path with review state until sample evidence is confirmed. | Lock shift-actuation interface and request sample protocol before nomination. |
| Marine hybrid auxiliary drive | Higher torque envelope, intermittent high load, longer lead-time tolerance. | Often pushes toward program path due to integration and compliance complexity. | Define integration checkpoints and timeline gates in joint engineering plan. |
| EV traction branch with synchronized shift requirement | Strict drivability expectations and certification scrutiny. | Program path likely required; catalog assumptions trigger no-go. | Verify recognized certification-body coverage and endurance evidence early. |
| Cost-first screening with sparse inputs | Ratio pair known but shift cycles, duty profile, and timeline undefined. | Boundary/review output; score is intentionally conservative. | Fill minimum input template before comparing quotes. |
Why is this page hybrid instead of pure guide content?
Because users need immediate manufacturer-fit output first, then evidence and boundary context to decide whether to trust that output.
Is this tool a final engineering approval system?
No. It is a procurement screening gate. Final approval still needs detailed validation and life testing.
Can I use this for single-speed gearbox selection?
Not directly. The model is tuned for dual-ratio two-speed pathways and will mark out-of-scope cases as boundary states.
What if my ratio targets are not finalized yet?
Use review output as directional guidance, then lock strict low/high bands before final supplier ranking.
Why do shift cycles/hour matter so much?
Shift frequency changes endurance and thermal pressure, which can force a higher supplier tier even if ratio and torque look acceptable.
How many suppliers should be shortlisted?
This page defaults to Go=3, Review=4, No-go=5 to match uncertainty and risk coverage.
When should I force program-OEM path?
When certification constraints, full traceability, synchronized e-shift, or high-risk applications are present.
Can low quoted price override boundary warnings?
No. Boundary warnings indicate structural risk that can invalidate price comparability or schedule confidence.
What is the minimum evidence pack for review status?
At minimum: sample plan, shift-duty assumptions, certificate status verification, and normalized RFQ field completeness.
How should unknown data be handled?
Keep unknown values explicit as N/A with reason, then assign a concrete next action to close each unknown.
Do standards like ISO 6336 remove integration risk?
No. Standards provide bounded rating context, not complete assembled-system validation.
How to avoid timeline overconfidence in global sourcing?
Apply regional lead-time offsets and scenario buffers rather than relying on one optimistic transit assumption.
Why does Incoterms selection affect manufacturer ranking?
Because CIF and CIP do not carry the same default insurance baseline in Incoterms 2020, which can change risk-adjusted landed cost.
When do EU machinery compliance assumptions need to change?
For EU launches on or after 2027-01-20, you should align evidence with Regulation (EU) 2023/1230 rather than relying only on Directive 2006/42/EC assumptions.
Source-backed fields are date-stamped (latest refresh: 2026-05-26). Heuristic rules are explicitly labeled in the relevant tables.
| Source | Checkpoint date | Data used | Link |
|---|---|---|---|
| ZF Duoplan two-speed product page | Snapshot checked: 2026-05-26 | Use cases, benefits, and product-family references for two-speed industrial gearbox branching. | https://www.zf.com/products/en/industrial_drives/products_64476.html |
| Redex RAM-MSD page | Snapshot checked: 2026-05-26 | Published ratios (1:1 and ~5:1), torque, efficiency, and shift-actuation notes. | https://redexusa.com/product/ram-msd/ |
| Redex RAM-MSD catalog PDF | Snapshot checked: 2026-05-26 | Supplemental dimensional and application context for spindle-focused two-speed architecture. | https://redexusa.com/wp-content/uploads/2016/03/2-SpeedSpindleGearboxes-1.pdf |
| Flender NAVILUS 2-speed page | Snapshot checked: 2026-05-26 | Marine-oriented two-speed product context and multi-mode operational framing. | https://www.flender.com/en/Products/Gear-Units/NAVILUS-2-Speed-Gearboxes/p/NAVILUS-gearboxes-ships-%20several-operation-modes |
| Dana 2-speed e-gearbox page | Snapshot checked: 2026-05-26 | Synchronized shift, low-range torque, and dual-motor operating claims for traction context. | https://www.dana.com/product/light-vehicle/2-speed-e-gearbox |
| IATF 16949 About | Snapshot checked: 2026-05-26 | Edition and migration context used for certification-gate reasoning. | https://www.iatfglobaloversight.org/iatf-169492016/about/ |
| IATF 16949 FAQs page | Snapshot checked: 2026-05-26 | FAQ 30-31 issued in November 2025; confirms interpretation updates after base standard publication. | https://www.iatfglobaloversight.org/iatf-169492016/iatf-169492016-faqs/ |
| IATF 16949 SIs page | Snapshot checked: 2026-05-26 | SI 27-30 issued/effective in November 2025; used to model requirement-drift risk. | https://www.iatfglobaloversight.org/iatf-169492016/iatf-169492016-sis/ |
| IATF recognized certification bodies | Snapshot checked: 2026-05-26 | Authorization boundary for certification activity. | https://www.iatfglobaloversight.org/certification-bodies/under-contract/ |
| IAF CertSearch status glossary | Snapshot checked: 2026-05-26 | Active/suspended/withdrawn/expired plus inactive/cancelled public-visibility rules. | https://support.iafcertsearch.org/certification-bodies/field-name-glossary/iaf-certsearch-dataset/certification-status |
| IAF CertSearch status guide | Snapshot checked: 2026-05-26 | Status definitions used in evidence-control section (active/suspended/withdrawn/expired). | https://support.iafcertsearch.org/verifiers/getting-started/certificate-verification-guide/understand-the-certification-status |
| ISO 6336-1:2019 | Snapshot checked: 2026-05-26 | Standards boundary framing for rating-method usage and validated geometry envelope. | https://www.iso.org/standard/63819.html |
| ISO Survey page | Snapshot checked: 2026-05-26 | From 2025 onward, survey data is built from IAF CertSearch and no longer split by country. | https://www.iso.org/the-iso-survey.html |
| ICC Incoterms 2020 key changes | Snapshot checked: 2026-05-26 | FCA on-board B/L option and CIF-vs-CIP insurance baseline differences used in trade-off controls. | https://iccwbo.org/resources-for-business/incoterms-rules/incoterms-2020/ |
| World Bank LPI 2023 release | Snapshot checked: 2026-05-26 | Global logistics variance context for schedule-risk calibration. | https://www.worldbank.org/en/news/press-release/2023/04/21/world-bank-releases-logistics-performance-index-2023 |
| EU machinery regulation overview | Snapshot checked: 2026-05-26 | Directive 2006/42/EC applies until 2027-01-19; Regulation (EU) 2023/1230 applies from 2027-01-20. | https://single-market-economy.ec.europa.eu/sectors/mechanical-engineering/machinery_en |
| Made-in-China gearbox manufacturer listing | Snapshot checked: 2026-05-26 | Directory-style SERP pattern reference for intent validation. | https://www.made-in-china.com/manufacturers/gearbox.html |
Continue to adjacent tools after finishing the two-speed manufacturer screening and report review.
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