JACK® S7-91T – Single Needle Post-Bed Triple Feed Lockstitch – Complete Setup, Table & Stand Included

The JACK® S7-91T is a single-needle post-bed lockstitch machine with computerized independent dual roller feed and intelligent control — the most advanced post-bed sewing machine for heavy-duty industrial applications. Its cylindrical post-bed design provides 360° access to tubular, hollow, and curved workpieces that flat-bed machines cannot reach, making it ideal for sewing patches onto caps and hats, leather shoe manufacturing, handbag production, and upholstery work. The machine features 4 stepper motors — one main shaft motor plus three additional stepper motors for needle feeding and two independent rollers with programmable differential — enabling accurate, quiet, and fast sewing on any curved surface. This complete setup includes the machine head, industrial table, stand, and high-torque direct drive motor — ready for production.

What's Included

• JACK S7-91T post-bed lockstitch sewing machine head (ships assembled)
• Heavy-duty industrial sewing table
• Industrial stand with motor mount
• High-torque direct drive servo motor
• LED + UV work lamp (dimmable, multiple intensities)
• Swing edge guide
• Standard accessories kit
• Instruction manual

Key Features

• Post-Bed Design — elevated cylindrical work surface provides access to tubular and curved articles including cap crowns, shoe uppers, bag interiors, glove fingers, and upholstery panels
• 4 Stepper Motors — main shaft motor + stepper motor on needle bar for needle feeding + two independent stepper motors on rollers with programmable differential for precise, quiet, and accurate sewing
• Independent Dual Roller Feed System — computerized control with adjustable differential ratio, ideal for 3D curved sewing on shoe heels, cap panels, and complex shaped goods
• Silent Bartack — stepper motor controlled, quieter and faster than traditional systems
• 5-Inch Multilanguage Touch Screen — easy adjustment of speed, stitch length, sewing modes, and parameters with voice guide
• Programmable Stitch Key — button for instant stitch length switching between different lengths
• Ornamental Stitch Patterns — program different stitch lengths and repetitions for decorative stitching
• High Perforation Capacity — penetrates 110+ layers of A4 paper, easily handles ultra-heavy work shoe fabrics and thick leather
• Rotary Roller Pressure Adjustment — quick and precise adjustment via screw on top of machine for different material thicknesses
• Extendable Double-Layer Bartack Lever — extractable second layer for easy arm operation while sewing
• Short Thread Trim — automatic thread cutter trims to just 3mm, eliminating manual trimming
• Self-Cooling Handwheel — fan-style design keeps internal components ~4°C cooler, extending machine life
• LED + Ultraviolet Light — dimmable multi-intensity lighting plus UV light to enhance seam line visibility on dark materials
• Swing Guide — maintains consistent seam distance, prevents thread loosening on corners and thickness changes
• Variable Speed 100–3,000 SPM — precise control from slow decorative work to high-speed production
• Bevel Gear Hook — reduces noise and vibration compared to standard gear systems

Ideal For

• Footwear Manufacturing — high-end leather shoes, sports shoes, work boots, shoe uppers, and heel seaming
• Leather Goods Production — handbags, suitcases, briefcases, wallets, belts, and gloves
• Cap & Hat Industry — sewing embroidered patches, leather patches, woven labels, and brand tags onto snapbacks, trucker hats, fitted caps, and beanies
• Automotive & Furniture Upholstery — car seats, sofas, office chairs, and heavy vinyl seating
• Sports Goods — balls, protective gear, athletic equipment, and technical apparel
• Promotional Products — branded headwear, corporate merchandise, and custom leather goods
• Military & Tactical Gear — morale patches, unit insignias, holsters, and heavy-duty equipment

Why Choose a Post-Bed Machine?

Unlike flat-bed sewing machines, the S7-91T's elevated cylindrical post allows tubular and curved workpieces to slide over the work surface, giving operators full access to areas that would be impossible to reach otherwise. Whether sewing the interior seams of a handbag, attaching patches to the curved crown of a cap, stitching around a shoe last, or finishing the inside of a glove, the post-bed design eliminates the limitations of traditional flat-bed machines. The independent dual roller feed with programmable differential maintains consistent stitch quality over curved surfaces, seams, and varying thicknesses — making the S7-91T the professional choice for precision work on three-dimensional goods.

Technical Specifications