JACK W4 Series: Next-Generation Flatbed Interlock Excellence for Modern Knitwear

Engineered for precision and versatility, the Jack W4 Series redefines flatbed interlock sewing with its advanced 3-needle design and integrated direct-drive technology. Built to handle everything from armhole finishing and binding to decorative stitching and overlock-style seams, this machine excels on even the most demanding materials like Lycra and stretch knits. The innovative bottom differential feed system ensures flawless, pucker-free stitching, while the 3-level adjustable LED lighting provides optimal visibility for every operation. Quiet, energy-efficient, and reliably robust, the W4 Series is the ultimate partner for high-quality blouses, activewear, and knitwear production.

Key Specifications:

🛠️ Machine Type: 3-Needle Flatbed Interlock
⚙️ Drive System: Direct-Drive Servo Motor (Energy-Saving & Low-Noise)
💡 Lighting: 3-Level Adjustable LED Worklight
🔄 Feed System: Bottom Differential Transport
🧵 Stitch Applications: Interlock, Binding, Overlock-Style, Decorative Stitching
🎯 Specialized For: Armhole Rolling, Blouses, Knitwear, Lycra & Stretch Fabrics

Ideal For:

👚 Blouses & T-Shirts | 🎽 Activewear & Sportswear | 🩲 Underwear & Innerwear |🧦 Lycra & Elastic Fabrics |✨ Decorative & Functional Seams

Precision, performance, and versatility—the Jack W4 Series delivers professional results for every knitwear challenge.

Jack W4 Machines Specifications