Construction & Materials

The racket frame utilizes a unidirectional carbon‑fiber layup with a 0°/90° orientation ratio of 60/40 to maximize torsional stiffness while keeping weight under 350 g. The core consists of a low‑density EVA foam (density 0.03 g/cm³) sandwiched between two 0.5 mm carbon‑fiber skins, providing a balanced flex‑response curve.

Surface finish options include a matte UV‑cured coating (hardness 2H) or a glossy polyurethane layer (hardness 1H) selected based on desired grip characteristics and UV‑stability requirements.

Dimensional Specifications

Tolerance on length and width is ±2 mm; weight tolerance is ±5 g. These values are derived from standard mold dimensions and can be shifted by adjusting layup thickness or core density.

Performance Characteristics

Static flexural modulus measured at the throat averages 12 GPa, yielding a natural frequency of approximately 180 Hz when gripped at the handle. This places the racket in the medium‑stiff category, suitable for players seeking a blend of power and control.

Impact resistance, evaluated via ASTM D3029 drop‑weight test, shows no delamination up to 15 J impact energy. The surface coating exhibits a scratch resistance rating of 3H (pencil hardness) under ISO 15184.

Customization Options

• Grip size: 4 in, 4 ¼ in, 4 ½ in (circumference) with optional over‑wrap thickness 0.5 mm–1.5 mm.
• String pattern: 16×19, 18×20, or custom hybrid patterns; string hole diameter 0.8 mm–1.0 mm.
• Color pigmentation: matte black, white, navy, or custom Pantone matches; UV‑stable pigments available.
• Weight tuning: internal tungsten inserts (0.5 g–2 g) placed at 3 o’clock or 9 o’clock positions to shift balance.

Each option is discussed during the quoting phase to ensure tooling adjustments remain within feasible lead times.

Manufacturing Process

Frame blanks are produced via compression molding in a heated steel mold at 180 °C under 150 bar pressure for 4 minutes. Post‑mold, the blanks undergo a secondary vacuum bagging step to consolidate the carbon‑fiber skins and remove voids.

Core insertion is performed using a CNC‑cut EVA slab, adhered with a low‑viscosity epoxy film (glass transition temperature 80 °C). Final trimming and drilling are executed on a 5‑axis CNC machine with ±0.1 mm positional accuracy.

Surface coating is applied in a dust‑free booth; curing occurs via UV LED array (365 nm) at 80 mW/cm² for 30 seconds, ensuring uniform thickness of 20 µm.

Quality Assurance

Incoming carbon‑fiber tow is inspected for areal weight (±2 %) and tensile strength (>4 GPa) using a laser‑based scanning system. Each molded frame undergoes a non‑destructive ultrasonic C‑scan to detect delamination or porosity exceeding 0.5 mm².

Dimensional verification is performed on a coordinate measuring machine (CMM) with a repeatability of 0.02 mm. Weight is checked on a calibrated analytical balance (readability 0.01 g).

Final visual inspection checks for coating uniformity, edge burrs, and logo registration under 10× magnification. AQL Level II is applied for cosmetic defects.

Applications

The round geometry enlarges the sweet spot, reducing off‑center torque transmission to the wrist—a benefit for recreational players and training environments where consistency is prioritized over maximal spin.

Because the frame’s torsional rigidity is balanced, the racket resists twisting during defensive blocks, making it suitable for doubles play where quick reaction shots are frequent.

OEMs targeting school sports programs or club‑level distributors often select this shape for its durability and lower string‑bed wear compared with elongated profiles.

Packaging & Shipping

Rackets are packed in individual corrugated sleeves (flute B, 150 gsm) with end‑caps formed from recycled PE foam. Each sleeve includes a silica gel packet (5 g) to control moisture during transit.

Master cartons hold 6 units, dimensions 480 mm × 260 mm × 120 mm, gross weight ≈2.2 kg. Palletization follows ISO 1448‑1 standards (40 units per pallet, 1.2 m height).

Export shipments comply with ISPM‑15 wood‑packing regulations; all cardboard is sourced from FSC‑certified suppliers.

Frequently Asked Questions

Can dimensions be customized beyond the listed ranges?

Yes. Adjustments to length, width, or thickness require a new mold or insert tooling; lead time increases by 2–3 weeks depending on complexity.

What information is required before quotation?

Target weight range, desired balance point, grip size, surface finish, and any branding or logo specifications. Providing a sample or CAD model accelerates the quote.

How is quality inspected for bulk orders?

Statistical process control is applied: each lot undergoes random sampling (n=5) for weight, balance, and C‑scan inspection. Results are recorded in a batch traceability report.

What packaging options are available for retail‑ready presentation?

We can replace the standard sleeve with a full‑color printed box (12 pt cardstock, matte lamination) and include a hang‑tag with QR code linking to product data.

Contact for Technical Inquiry

To request a detailed specification sheet, discuss custom tooling, or arrange a sample shipment, please use the inquiry form below.