Service

Yes. PairGears provides a 6-month limited warranty for parts manufactured by PairGears. If a failure is confirmed to be caused by a manufacturing defect within the warranty period, we will arrange repair or replacement. What’s covered This warranty covers issues caused by manufacturing defects (e.g., confirmed nonconformance linked to production/heat treatment/manufacturing control), based on claim review and evidence. What’s not covered The warranty does not cover damage caused by misuse, incorrect installation/operation, unauthorized modification, or human error. Normal wear and damage after improper handling are also excluded. How to file a warranty claim (steps) 1. Provide PO/part number/lot or batch info2. Share photos/videos and a brief failure description (running conditions help)3. Provide any available inspection data (if you have it)4. We review and confirm the remedy (repair/replacement/return analysis) Send part number + PO + lot/batch info + photos/videos. We’ll confirm the next steps quickly.

Yes. We can provide practical guidance on common ISO and DIN standards used for gears—such as how an accuracy grade is specified on drawings and how it maps to inspection outputs. If you share your drawing note (ISO/DIN/AGMA grade), we’ll align the measurement/report package accordingly. What we can help you with 1. Identify which standard/grade your drawing is referencing2. Explain what the key accuracy items usually mean (profile/lead/pitch/runout)3. Confirm what inspection evidence can be provided for that requirement4. Help clarify “equivalent” expressions between standards (when applicable) What it depends on 1. Gear type (spur/helical/bevel/worm) and application sensitivity2. Which standard is specified (ISO vs DIN vs AGMA)3. Whether you need explanation only, or explanation + full inspection charts4. How strict the acceptance criteria are (critical characteristics) Reference blog 1. ISO Standards in Gear Manufacturing: A Detailed Overview2. Understanding AGMA Standards: A Key to Gear Quality Control3. Understanding DIN Standards in Gear Manufacturing: Ensuring Precision and Reliability Quick table You provide We return Why it helps Standard/grade note on drawing Interpretation + report plan avoids mismatch Target accuracy itemsrecommended inspection scopesaves cost/timeApplication infopractical tolerance discussionreduces risk Send the ISO/DIN note from your drawing (or your target grade). We’ll confirm how we interpret it and what inspection outputs we’ll provide.

Yes. We can share a redacted sample inspection report to show the typical report format and scope (e.g., dimensional results, hardness, and gear profile/lead charts if required). Sensitive customer/project identifiers will be removed. What a “sample inspection report” usually contains Depending on the part and requirement, it may include:1. Dimensional inspection results (key dimensions, datums)2. Hardness / case depth (if heat treated)3. Gear measurement pages (profile/lead/pitch/runout) when specified4. Summary judgment and traceable identifiers (lot/date) What you can request √ Full dimensional (FAI-style) vs key characteristics only√ Gear charts required or pass/fail summary only√ Sampling plan (per piece vs per batch) How we handle confidentiality We can share:1. Generic format samples2. Redacted pages without customer name, drawing number, or pricing3. For full project-level samples, we usually proceed under NDA. Quick table Report type Best use Notes Dimensional report onboarding / first order shows measurement approach Hardness/HT reportheat-treated partsconfirms HT targetsGear profile/lead chartshigh precision gearsclarifies metrology scope Tell us what report you need (FAI, gear charts, hardness/case depth). We’ll share a matching redacted sample and confirm what will be included with your order.

Yes. For repeat orders, we can provide lot/batch traceability linking raw material (heat/batch) to key process records and final inspection for the shipped lot. The exact traceability depth depends on your program requirements and documentation package. What “traceability” typically includes Traceability usually connects:1. Raw material heat/batch → material certificate (when requested)2. Process/operation records (as applicable)3. Heat treatment record (when applicable)4. Final inspection report + shipment lot identification What the traceability depth depends on √ Your document pack requirement (COC only vs full pack)√ Whether you require per-lot or per-piece tracking√ Critical characteristics that must be linked to inspection data√ Any customer-specific format (vendor portal templates) How we maintain traceability 1. Assign lot/batch ID for production and inspection2. Record key checkpoints under the same lot ID (materials/HT/inspection)3. Mark packaging and shipment documents with the lot reference4. Provide traceability documents with shipment, as agreed Quick table What you ask for What we provide Best for Basic lot traceability lot ID + final inspection + shipment link standard repeat orders Material + HT + inspection linkcertificates + HT report + inspectionhigher QA programsCustom formatmapping to your templateonboarding / key accounts Share your traceability requirement (lot vs piece, required documents). We’ll confirm the traceability level and include it in the inspection pack for repeat orders.

Yes. We can provide FAI, COC (Certificate of Conformance), and material certificates as part of the shipment documentation when required. PPAP-related documents can also be supported for customer programs that require them. The exact document set is confirmed during quotation and onboarding. What we typically provide → COC/COA: confirmation the shipped lot meets agreed requirements→ Material certificate: material grade/heat/batch information (as available/required)→ FAI (First Article Inspection): first-sample dimensional verification (scope agreed)→ PPAP package items: provided per customer requirement level and NDA What affects the document package √ Customer requirement (standard pack vs full pack)√ Sampling plan (per piece vs per lot)√ Whether gear charts (profile/lead/pitch) are required√ Confidentiality/NDA and customer-specific templates How we make reports useful We align charts to your functional datums and critical characteristics so you can see:1. Where the deviation occurs (shape vs slope)2. Whether it’s stable or drifting (process consistency)3. What the risk is for noise/backlash/life (when relevant) Steps 1. Tell us the required documents in your RFQ2. Confirm submission format (PDF, portal, template)3. We include the document pack in the quote and delivery plan4. Documents are released with shipment (or at sample approval stage) Quick table Document When it’s used Typical timing COC every shipment (if requested) with shipment Material certcritical material controlwith shipmentFAInew part / first orderat sample approvalPPAPautomotive programsper agreed schedule Share your required document list (FAI/PPAP/COC/material cert + gear charts). We’ll confirm scope and include it in the quotation and inspection pack.

Yes. We can provide tooth profile and lead charts and explain “pass/fail” by comparing measured deviations against the tolerance limits on your drawing (or the agreed standard/grade). “Pass” means the results stay within limits for the specified items. What “pass/fail” actually means “Pass/fail” is not a simple checkbox. It’s a judgment based on:• Measured deviation (curve/values from the gear measuring report)• vs allowed tolerance band (upper/lower limits)If the curve or values exceed the tolerance band, it’s fail for that parameter. What we include in the explanation √ Which parameter is being checked (profile/lead/pitch/runout)√ Which tolerance/grade applies√ Where the deviation occurs (localized vs systematic trend)√ What action is recommended if it’s close to the limit (extra check or process adjustment) Quick table Item What you see “Fail” typically means Profile curve vs tolerance band curve exceeds the band Leadslope/shape vs bandtrend out of bandPitch (if included)spacing valuesone/more points out Tell us your standard/grade and whether charts are needed for samples only or each batch. We’ll include the report package in the quotation.

Yes. If required, we can provide full gear measurement charts—including tooth profile, lead, and pitch—not just pass/fail. The report scope is confirmed during quotation (sample stage vs mass production, and which parameters are critical). What you’ll receive Depending on your requirement, we can provide:1. Tooth profile chart2. Tooth lead/helix chart3. Pitch / spacing results4. Runout / span over pins (as applicable)5. Summary judgment (pass/fail) with tolerances referenced What affects report availability √ Drawing references/standard (ISO/DIN/AGMA) and tolerance definition√ Whether it’s FAI/sample approval or routine batch release√ Required sampling plan (per part / per batch / per shift)√ Confidentiality level (redaction needed) How we make reports useful We align charts to your functional datums and critical characteristics so you can see:1. Where the deviation occurs (shape vs slope)2. Whether it’s stable or drifting (process consistency)3. What the risk is for noise/backlash/life (when relevant) Quick table Report type What it shows Typical use Profile chart involute deviation mesh quality / noise Lead charthelix/lead deviationcontact pattern / loadPitch resultsspacing deviationsmoothness / transmission Tell us your required standard and tolerance grade, and whether you need charts for samples only or for every batch. We’ll include the report package in the quote.

Yes. We can produce gears and shafts based on physical samples. For best accuracy, sample-based projects usually require measurement + confirmation before cutting tooling, so the first-sample timeline may be longer than drawing-based projects. When sample-based production works best Sample-only is a good fit when you’re replacing an existing part or you don’t have drawings. It’s especially effective if you can provide mating-part information so we can confirm fits and functional targets. What affects cost and lead time 1. Sample condition (wear/damage can distort geometry)2. Measurement depth (basic dimensions vs full gear metrology)3. Need for multiple samples (to filter out wear influence)4. Accuracy/inspection requirements (profile/lead/pitch reports, etc.) Steps 1. Sample intake + application review2. Measurement + manufacturing definition (drawing/CAD)3. Quote + first sample plan4. Sample inspection + your confirmation5. Bulk production after approval Quick table What you provide What we do Typical impact 1 sample only Measure + rebuild definition Higher uncertainty 2–3 samplesCross-check geometryLower riskSample + mating infoFit/function reviewFaster confirmation Send your sample and quantity plan. We’ll confirm manufacturability, lead time, and the inspection pack options in the quotation.

Yes. We can manufacture gears from your drawing or from a physical sample. A complete drawing is usually the fastest route; a sample is most useful when you want match-fit verification or the drawing is incomplete. When a drawing is enough If your drawing includes tooth geometry, tolerances, and material/heat-treat requirements, we can quote → make samples → then move to bulk after approval. Clear “first article” validation is commonly used to confirm the first produced part meets requirements before scaling up. When a sample helps A sample helps when:• Tooth data or tolerances are missing on the drawing• You’re replacing an existing part and need match-fit to mating parts• You want to benchmark wear/noise/backlash performance using a “known good” reference What we need to quote accurately 1. Drawing (2D/3D) or sample + photos of mating parts2. Gear data (module/DP, teeth, pressure angle, helix angle if any, face width)4. Material & heat treatment (hardness/case depth targets if applicable)5. Accuracy/inspection requirements (dimensional + gear profile/lead if required)6. Quantity plan + Incoterms (FOB/CIF/DDP) Quick table Input Typical result Notes Complete drawing Drawing + sample Lowest ambiguity Drawing + sampleLower risk for first orderBest for match-fitSample onlyExtra measurement & confirmationMore time upfront Send your drawing/sample and quantity plan. We’ll confirm manufacturability, lead time, and the inspection pack options in the quotation.

We can manufacture a custom precision gear from a complete drawing alone. A sample is helpful but not always required—it’s mainly used when drawings are incomplete, revisions are uncertain, or the mating-fit needs real-world verification. First-article inspection is commonly used to validate the first produced part against requirements before scaling to production. When a drawing is enough A drawing is usually sufficient when it includes:• Tooth data (module/DP, teeth, pressure angle, helix, face width)• Datum scheme, tolerances, fits, and material/heat treat requirements• Required inspection outputs (dimensional + gear metrology scope) When we recommend adding a sample A sample helps when:• The drawing is missing tooth details or tolerance stack info• You’re replacing an existing part and need match-fit to mating parts• The application has sensitivity to noise/backlash and you want a “known good” reference What it depends on 1. Drawing completeness (geometry + tolerances + heat treat)2. Accuracy target & inspection scope (higher grade needs clearer definition)3. Mating-part uncertainty (center distance/backlash constraints)4. Revision control (frequent changes → sample helps align expectations) Quick table You provide We can do Notes Complete drawing Quote → sample → bulk Fastest, lowest ambiguity Drawing + sampleQuote with lower riskBest for first order / match-fitSample onlyReverse-engineer + confirmMore time/cost upfront Send your drawing (PDF/STEP) and tell us your quantity plan + target accuracy + heat treat. If you also have a sample, mention it—we’ll advise whether it adds value for fit verification.

Yes—a supplier can manufacture precision gears from a sample only, but it usually increases engineering/measurement work, which can raise cost and extend lead time, especially for tight tolerance or high accuracy grades. Reverse engineering typically requires accurate geometry capture and CAD definition before production. What “sample only” typically involves When there is no drawing, the supplier must create a “manufacturing definition” by:• Measuring interfaces and tooth geometry• Rebuilding CAD/drawings• Validating fits and functional targets (noise, backlash, contact pattern where applicable) How it affects cost Cost may increase due to:• Metrology time (more measurement and verification)• Potential need for multiple samples (to separate wear from original geometry)• More iteration in prototype validation (fit/mesh test)• Additional tooling decisions (cutters/fixtures) driven by rebuilt geometry How it affects lead time Lead time often increases because you add steps before cutting chips:1. Sample receipt & evaluation2. Measurement + CAD/drawing reconstruction3. Internal review + customer confirmation4. Sample manufacturing & inspection5. Bulk after sample approval Quick table Input you have Typical impact How to reduce impact Sample only Higher engineering effort → cost/lead time ↑ Provide mating part info + multiple samples Sample + basic specsModerateShare module/teeth/center distance if knownFull drawingLowest risk & fastestLock critical characteristics early If you only have a sample, send 2–3 samples if possible, plus where it runs (gearbox model / mating gear photos). We’ll confirm the reverse-engineering scope and give you a quote with a realistic timeline.

Yes—we can measure third-party gears and provide inspection data as long as the part is legitimately obtained and the request doesn’t violate NDA/IP restrictions. Measurement scope depends on what you need (dimensions only vs full gear metrology) and what references you can provide (mating parts, application, drawings). Reverse engineering is often lawful when a product is legitimately obtained, but IP/trade-secret risks must be managed carefully. When we can support If you have an existing gear/shaft that needs replacement, benchmarking, or fit verification, we can:• Measure key interfaces (bore/shaft fit, runout, faces)• Measure tooth data and provide a report (when feasible)• Build a “manufacturing drawing” for quotation and production (under agreed terms) What it depends on 1. Ownership & restrictions: whether the part is yours to share and not under NDA/confidentiality2. Measurement depth: basic dimensional checks vs full gear inspection (profile/lead/pitch)3. Part condition: wear/damage may distort measured values (we may request multiple samples)4. Application context: mating part info affects how we interpret fits/backlash targets How we control quality and risk 1. Confirm the part is legitimately obtained and free of contractual restrictions2. Define measurement scope and acceptance references (what “good” looks like)3. Run measurement + issue a report; for reverse-engineered manufacturing, we’ll confirm critical interfaces with you4. If production is needed, we proceed to sample → confirmation → bulk under controlled revision Quick table Request type What you provide What you get Dimensional measurement Reverse-engineer for manufacturing Dimensional report Gear metrologySample(s) + mating part info (if possible)Tooth data report (scope-defined)Reverse-engineer for manufacturingSample(s) + application infoQuote + sample plan + controlled drawing If you’re onboarding a new supplier, send your vendor questionnaire or request an Audit Pack. If you have a part to quote, share your drawing/spec + quantity plan, and we’ll respond with a process route, lead time, and inspection pack options.

PairGears is a direct gear manufacturer (not a pure trading company). We run our own gear and shaft production operations—from machining and gear cutting to heat treatment and inspection—so we can control quality and delivery directly. What we manufacture in-house In practical terms, “direct manufacturer” means we manage the key production chain with our own people and equipment. Our company profile describes PairGears as a high-tech enterprise engaged in R&D, manufacturing, and sales of gears and shafts, and notes substantial in-house equipment for machining and gear processes.This matters because your order is handled with a single process owner: drawing confirmation → process route → in-process QC → final inspection → shipment release. What we still do through qualified partners As with most gear factories, some “supporting links” may be outsourced or co-processed when needed (for example, certain special surface treatments or logistics services). But the core manufacturing and quality control responsibilities remain with PairGears under our quality system and shipment release rules. Quick reference table Topic PairGears position What you can ask us to provide Company type Direct manufacturer Factory profile, process route summary Quality systemProcess QC + final inspection under QMSQC flow / inspection pack listCapability proofIn-house equipment + production base infoEquipment summary (public) + NDA version If you’re onboarding a new supplier, send your vendor questionnaire or request an Audit Pack. If you have a part to quote, share your drawing/spec + quantity plan, and we’ll respond with a process route, lead time, and inspection pack options.

For OEM repeat parts with existing tooling/fixtures, our typical production cycle is about 15 days. For custom gears requiring new tooling, samples usually take ~30 days, and mass production typically takes 15–30 days, depending on specifications and approval steps. Note: In manufacturing, lead time usually includes setup/changeover, processing, waiting between operations, and final inspection—so it will vary with process route and inspection scope. Typical Timelines Order Type What It Means Typical Timing OEM / repeat production Tooling and process route already validated ~15 days Custom gear – samples New tooling/fixtures/cutters + first-article inspection ~30 days Custom gear – mass production After sample approval (and PPAP if required) 15–30 days What Can Change The Timeline • Tooling status: new cutters/fixtures/gauges required or not (new tooling adds time)• Process route: heat treatment + grinding + gear inspection steps (more steps = longer cycle)• Quality/approval requirements: FAI, full dimensional report, gear profile/lead report, PPAP submission level (if required)• Order volume & schedule slot: batch size and capacity reservation on critical processes (heat treat / grinding / gear inspection) How We Keep Lead Time On Track • Lock drawing revision and confirm critical characteristics before release• Milestone schedule: tooling/DFM → sample → approval → mass production (owners + checkpoints)• Capacity reservation on bottleneck operations (heat treatment, grinding, gear inspection)• First-article approval before batch release, and QA sign-off before shipmentLock drawing revision and confirm critical characteristics before release What We Need From You To Confirm Lead Time Quickly • Drawing/3D (or sample) + material & heat treatment requirement• Gear spec: module/DP, teeth, accuracy grade (ISO/DIN/AGMA), hardness/case depth target• Quantity (trial + annual volume) and target Incoterms (FOB/DDP)• Any required documents: COC/material cert/heat-treat report/gear measurement charts/PPAP Send your drawing/specs and quantity plan—we’ll confirm the exact lead time and a milestone schedule in the quotation.