Coka Badminton Racket – Industrial Supply Overview

This section outlines the core attributes of coka badminton rackets produced for bulk procurement, focusing on measurable engineering characteristics that influence performance and compatibility with downstream assembly or branding processes.

Key Technical Parameters

Weight typically ranges from 78 to 85 grams unstrung, allowing precise tuning for swing speed preferences. Length adheres to the Badminton World Federation limit of 680 mm, with tolerance ±1 mm. Balance point is expressed as millimeters from the handle end, commonly falling between 285 mm and 305 mm for head‑light to even‑balance configurations.

Material Composition and Layup

The frame uses high‑modulus graphite fibers (modulus ≥ 45 GPa) combined with nano‑carbon additives to increase tensile strength without adding mass. A low‑viscosity epoxy resin system ensures proper fiber wet‑out during layup. The shaft incorporates a tapered layup where the outer layers consist of 30 mm unidirectional tape for torsional stiffness, while inner layers use 45 ° bias plies to manage flex.

Manufacturing Process

Prepreg sheets are cut to pattern and placed in a heated compression mold. The mold applies pressure of approximately 1.8 MPa while heating to 180 °C for a cure cycle of 20 minutes, achieving full resin polymerization. After cooling, the frame undergoes demolding, trimming, and shaft insertion using a press‑fit technique with controlled interference fit of 0.02 mm.

Quality Assurance and Inspection

Each racket is weighed on a precision balance with readability 0.01 g; acceptance criteria require weight within ±0.5 g of target. Swing weight is measured using a pendulum method, with tolerance ±2 % of design value. Shaft straightness is checked via laser run‑out inspection, accepting deviation <0.15 mm over 300 mm length. Surface finish is evaluated for resin richness and absence of voids under 10× magnification.

Typical Applications in B2B Markets

OEMs integrate these rackets into private‑label product lines, relying on consistent weight distribution to maintain brand performance specifications. Sports distributors stock them for club‑level programs where predictable feel reduces inventory turnover risk. Training academies purchase batches for athlete development programs, benefitting from tight tolerances that facilitate comparative testing.

Customization Options for Industrial Buyers

Weight can be adjusted in 0.5 g increments by varying resin content or adding tungsten tape inserts. Balance point shift is achievable through asymmetric layup or insert placement in the handle region. Grip size options range from G2 to G5, with overlay thickness selectable from 0.6 mm to 1.2 mm. Graphics can be applied via sublimation printing or laser etching, and string pattern holes can be customized to 16×19, 18×20, or client‑specific layouts.

Specification Table

Frequently Asked Questions

• Can weight and balance be adjusted after sampling? – Yes, adjustments are made during pre‑production layup based on client‑provided target values.
• What information is required before quotation? – Desired weight range, balance point, grip size, graphics file, and estimated annual volume.
• Which materials are available for the frame? – Standard high‑modulus graphite with optional nano‑carbon reinforcement; alternative alloys are offered upon request.
• How is quality inspected for bulk orders? – Each lot undergoes random sampling for weight, swing weight, shaft straightness, and visual inspection per ISO 9001‑based procedures.
• What packaging methods are available? – Individual rackets in PE bags, packed in corrugated cartons with corner protectors; palletization available for container loads.
• How are export shipments protected? – Cartons are sealed with moisture‑resistant tape and marked with handling instructions; optional desiccant packs are included.
• What is the typical production lead time? – 25‑35 working days after final artwork approval, depending on order size and current capacity.
• How are samples arranged? – Sample units are produced against approved specifications and shipped via express courier; charges are credited upon order confirmation.

Request Technical Data Sheet or Quote

For detailed material certificates, tolerance reports, or to initiate a quotation, please contact our technical sales team using the form linked below.