Highlead GC20638 Heavy-Duty Unison Feed Lockstitch Sewing Machine

Description

Highlead GC20638 Heavy-Duty Unison Feed Lockstitch Sewing Machine

Industrial high-speed flatbed walking foot lockstitch machine engineered for heavy-duty assembly, structural seaming, and decorative topstitching across medium-heavy to heavy-weight fabrics, leather, and coated technical materials. The Highlead GC20638 utilizes an advanced synchronized unison compound feed mechanism (bottom feed, needle feed, and alternating walking presser feet) to transport multi-layer materials smoothly without ply slippage, bunching, or stitch-length variation. Built as an upgraded companion within Highlead’s compound-feed family, it combines heavy penetration capability with high-speed performance for continuous manufacturing shifts.

Equipped with an oversized vertical-axis rotary hook and extra-large bobbin capacity, the machine minimizes downtime needed for bobbin replacement, particularly when running thick bonded synthetic threads. A built-in safety clutch protects the internal timing gears and hook assembly from damage during accidental thread jams or needle collisions. With dual-dial adjustable alternating presser foot movement, high needle-bar stroke, and an automatic forced lubrication pump, the GC20638 reliably climbs bulky cross-seams and reinforced edge transitions across furniture upholstery, automotive seating, and heavy canvas goods.

Key Features

• Industrial flatbed unison compound feed lockstitch sewing machine

• Synchronized three-way feeding system (needle feed, drop feed, alternating walking feet) for slip-free material transport

• High-capacity vertical-axis rotating hook holding substantial bobbin thread for thick industrial threads

• Integrated safety clutch mechanism automatically disengaging the hook drive during thread jams to prevent gear damage

• Top-mounted adjustment dial for alternating presser foot vertical stroke to maintain balanced feeding across varied layer thicknesses

• High needle-bar stroke delivering strong penetration through dense leathers, heavy synthetics, and multi-ply webbing

• Automatic lubrication system with integrated oil pump ensuring long component service life at high duty cycles

• Accessible manual reverse feed lever for quick backtacking and seam locking

• Rigid cast-iron chassis engineered to suppress operating vibration during continuous production runs

Specifications

• Brand: Highlead

• Model: GC20638 (Single Needle) / GC20638-2 (Twin Needle option)

• Class: Heavy Duty / Flatbed Unison Feed Series

• Machine Type: Flatbed Compound Feed Lockstitch Machine

• Stitch Type: 301 Lockstitch

• Number of Needles: 1 (or 2 depending on subclass)

• Feed System: Unison Compound Feed (Walking Foot + Needle Feed + Drop Feed)

• Bed Type: Standard Industrial Flatbed

• Maximum Stitch Length: Up to 9–10 mm

• Presser Foot Lift: Up to 8–9 mm (by hand) / 16 mm (by knee lifter)

• Needle Bar Stroke: 36–38 mm

• Alternating Presser Foot Rise: 2.5 mm – 6.5 mm (dial-adjustable)

• Hook Type: Large Vertical-Axis Rotary Hook (Double-Capacity Bobbin)

• Needle System: DPx17 (135×17)

• Needle Size: #18–#24 (Nm 110–180)

• Maximum Sewing Speed: Up to 2,000–2,500 stitches/min

• Safety Device: Push-Button Resetting Safety Clutch

• Lubrication: Fully Automatic Oil Pump System

Suitable For: Sofa & Furniture Upholstery • Automotive Seating & Interior Trims • Heavy Leather Goods & Luggage • Marine Canvas & Boat Covers • Tarpaulins & Heavy Tents • Safety Harnesses & Industrial Straps • Footwear & Work Boots • Backpacks & Rucksacks • Technical Webbing Assemblies • Heavy Denim & Workwear