16-feather optical & manual grading
Feathers are sorted by left/right wing anatomy, rachis wall thickness, natural camber radius and vane density so all 16 feathers in a single crown rotate at a uniform rate.
Compare goose feather modelsShuttlecock manufacturing
& BWF quality control standards.
How feather shuttlecocks and badminton equipment in our Anhui & Zhejiang supply chain are sorted, assembled, flight-tested and inspected before international dispatch.
SUPPLY CHAIN TRANSPARENCY
Engineered for repeatable flight, rally durability & clear tolerances
International buyers need verifiable technical tolerances rather than vague marketing claims. Below is the exact 8-stage manufacturing and quality control workflow used across our feather shuttlecock supply chain.
BWF 4.74–5.50 g & speed 75–79 calibration
Finished shuttlecocks are micro-weighed within ±0.05 g buckets and flight-tested over a 13.40 m court to verify landing length for speeds 75, 76, 77, 78 and 79.
View speed chart (75–79)AQL 2.5 pre-shipment verification
Before export cartons are sealed, tubes are audited for 12-shuttle count, cork leather adhesion, rib resin curing, speed sticker accuracy and master carton CBM/weight.
Read China QC checklist8-STAGE PRODUCTION WORKFLOW
Feather shuttlecock manufacturing process & BWF tolerance matrix
Step-by-step process controls from raw feather conditioning in Anhui & Zhejiang to export carton sealing.
| Manufacturing Stage | Workshop Process Control | Target Technical Tolerance | Court & Buyer Benefit |
|---|---|---|---|
| 01. Raw Feather Washing & Conditioning | High-temperature degreasing, peroxide-free cleaning and controlled drying | 8% – 12% residual feather moisture | Prevents brittle rachis breakage in air-conditioned or winter sports halls |
| 02. Wing Left/Right & Camber Sorting | Optical and manual grading by wing side, curvature radius, shaft wall thickness and vane whiteness | 100% same-wing orientation · ±0.15 mm rachis thickness within tube | Guarantees stable axial rotation (320–380 RPM) and straight trajectory |
| 03. Composite Cork Core Moulding | 2-layer and 3-layer composite cork pressing, leather wrap bonding and diameter turning | 25.0 – 28.0 mm base diameter · Shore A 78–84 elasticity | Prevents cork softening, dimpling or peeling under 24–30 lbs string tension |
| 04. 16-Feather 360° Socket Drilling | CNC rotary indexing head drills 16 angled sockets into the cork collar and inserts matched feathers | 16 feathers · 62 – 70 mm length · ±0.2 mm socket angle accuracy | Eliminates off-axis wobble during high clears and net tumbles |
| 05. Double Cotton Lacing & Resin Locking | Twin-line high-tenacity cotton rib stitching followed by centrifugal PU/epoxy resin groove curing | 65.0 – 68.0 mm skirt diameter · uniform rib tension | Locks feather shafts together so a single frame mishit does not split the crown |
| 06. Electronic Micro-Scale Weight Grading | Individual shuttlecock weighing and grouping into 0.1 g production buckets | 4.74 – 5.50 g BWF regulation window · ±0.05 g per tube | Ensures all 12 shuttlecocks in a tube feel identical off the racket face |
| 07. Baseline Speed & Flight Tunnel Test | Mechanical launcher and human tester verification over a 13.40 m regulation court | Speeds 75 / 76 / 77 / 78 / 79 · ±150 mm landing zone tolerance | Matches shuttle deceleration to buyer hall temperature (°C/°F) and altitude |
| 08. Foil Tube Sealing & AQL 2.5 Carton Audit | 12-shuttle foil-lined tube packing, end-cap speed coding and 5-ply master carton drop check | AQL 2.5 Major / 4.0 Minor · 12 shuttles/tube · 50 tubes/carton | Protects feathers from ocean/air humidity fluctuations during export transit |
PRE-SHIPMENT AUDIT STANDARDS
AQL 2.5 / 4.0 defect classification & inspection matrix
Use these inspection criteria in your purchase order or Basic/Pro procurement brief to define acceptance standards prior to shipment.
| Product Category | Critical Defects (AQL 0) | Major Defects (AQL 2.5) | Minor Defects (AQL 4.0) | Verification Method |
|---|---|---|---|---|
| Feather Shuttlecocks (Huiyu 27 models) | Mixed wing orientation, broken rachis in new tube, wrong speed sticker, <12 shuttles/tube | Flight wobble (Grade C/D), weight outside ±0.10 g of speed spec, loose cork leather wrap | Slight vane colour variance, minor outer tube label scuff | Sample 3 tubes per 50-tube carton · 100% flight & scale check on sample |
| Badminton Rackets (Graphite profiles) | Frame hairline crack, twisted shaft axis, sharp grommet burrs, wrong grip size label | Unstrung weight outside ±3 g of 3U/4U/5U brief, balance point outside ±4 mm, paint bubble >2 mm | Minor decal alignment <1 mm, polybag wrinkle | Digital scale, balance board & grommet inspection before carton packing |
| Badminton Strings (Sets & 200 m reels) | Severed filament, wrong gauge code, short length (<10 m per set) | Diameter variance >±0.02 mm, unsealed retail pouch | Slight printing offset on outer carton | Micrometer gauge check & pouch seal verification |
| Overgrips & Replacement Grips | Missing adhesive backing, dried/oxidised PU surface, wrong pack count | Strip width/thickness outside ±0.1 mm, missing protective film | Slight shade difference between dye lots | Random box opening, dimension caliper check & tackiness test |
QUALITY CONTROL FAQ
Questions on testing, tolerances & inspections
How we verify shuttlecock flight, speed codes and equipment specifications before dispatch.
What BWF dimensional and weight standards do your feather shuttlecocks follow?
All 27 Huiyu feather shuttlecock models are manufactured to standard BWF physical specifications: 16 natural feathers fixed in a 25–28 mm cork base, feather length between 62 and 70 mm (uniform within each shuttlecock), skirt crown diameter between 65 and 68 mm, and total shuttlecock weight between 4.74 and 5.50 grams calibrated into speeds 75, 76, 77, 78 and 79.
How do you prevent shuttlecock feathers from drying out during sea or air freight?
During Stage 01 conditioning, feathers are stabilised at 8%–12% moisture content rather than bone-dry baking. Finished shuttlecocks are packed in foil-lined 12-shuttle tubes with protective end caps and 5-ply export master cartons to buffer against container humidity swings.
Can we book a pre-shipment inspection before paying the final balance?
Yes. Every wholesale or Basic/Pro procurement order can include an agreed pre-shipment check brief covering quantity count, speed code verification, weight tolerance, flight stability and carton markings. Third-party inspection agencies (such as SGS, Bureau Veritas, QIMA or buyer-appointed inspectors) are welcome by prior appointment.
How do we verify that bulk production matches our approved sample tubes?
When you approve a sample tube, we record the model code, speed number (75–79), gram weight window and batch reference on your proforma invoice. Keep 1 sealed sample tube at your facility as a reference standard against the bulk delivery.
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