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 Model S7-91T Machine Type Industrial Post-Bed Single-Needle Lockstitch Applications Shoes, Leather Goods, Caps/Hats, Bags, Gloves, Upholstery, Sports Goods Needle System 134 / 134LR / 134D, sizes #14–#23 Number of Needles 1 Stitch Type Lockstitch Max Stitch Length 5 mm Presser Foot Lift 12 mm Feed System Triple Feed (Top Roller, Bottom Roller, Needle Feed) — Independent Computerized Dual Rollers with Differential Motors 4 Total: 1 Main Shaft + 3 Stepper Motors (needle bar + 2 independent rollers) Motor Type High-Torque Direct Drive Servo Motor Drive Type Direct Drive (beltless) Sewing Speed 100–3,000 SPM (variable) Hook System Vertical Axis Rotating Hook (Bevel Gear) Thread Trim Automatic — 3mm short thread tail Presser Foot Lifter Automatic Bartack Stepper Motor Controlled (Silent) Control Panel 5-Inch Multilanguage Touch Screen with Voice Guide Lighting LED (dimmable, multi-intensity) + Ultraviolet Light Penetration Capacity 110+ layers A4 paper Presser Feet Roller Feet (Standard) Setup Complete with table and stand
