Maqi LS-4400 Unison Feed Heavy-Duty Lockstitch Sewing Machine

Description

Maqi LS-4400 Unison Feed Heavy-Duty Lockstitch Sewing Machine

Heavy-duty flatbed industrial lockstitch machine engineered for processing medium- to heavy-weight materials, coated technical fabrics, and dense structural leathers. The Maqi LS-4400 features a synchronized unison feed (triple-feed) mechanism combining bottom feed, needle feed, and alternating walking foot top feed to ensure smooth, positive material transport without layer shifting or stitch distortion. This feed action maintains uniform stitch pitch across thick multi-ply stacks and steep cross-seams. Equipped with a high-capacity horizontal-axis rotary hook, expansive working clearance, and high foot lift height, this machine provides dependable feeding and seam consistency for automotive trim, upholstery shops, leather accessory workshops, and heavy canvas production lines.

Key Features

• Unison feed (compound triple-feed) system: drop feed, needle feed, and alternating walking foot

• Large horizontal-axis rotary hook reduces bobbin change frequency and accommodates thicker thread sizes

• High alternating presser foot stroke facilitates smooth climbing over heavy, uneven cross-seams

• Generous under-arm working clearance allows easy maneuvering of bulky, rolled fabric panels

• Safety clutch mechanism automatically disengages the hook drive in case of thread jams to prevent timing displacement

• Convenient top-mounted dial for quick and precise stitch-length adjustment

• Smooth reverse feed lever for secure backtacking and seam reinforcement

• Fully enclosed automatic lubrication system ensures quiet running and extended mechanical lifespan

Specifications

• Brand: Maqi

• Class: LS Series

• Model: LS-4400 (Single Needle Unison Feed)

• Stitch Type: 301 Lockstitch

• Number of Needles: 1

• Feed System: Unison Feed (Bottom Feed + Needle Feed + Alternating Walking Foot)

• Maximum Stitch Length: Up to 9 mm

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

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

• Alternating Foot Stroke: 2.5 mm – 6.5 mm

• Needle System: 135×17 (DP×17)

• Needle Size Range: Nm 125–180 (#20–#24)

• Hook: Large Horizontal-Axis Double-Capacity Hook

• Lubrication: Automatic Centralized Oil Pump System

Suitable For: Sofa & Furniture Upholstery • Automotive Seats & Interior Trim • Leather Handbags & Wallets • Travel Bags & Luggage • Heavy Canvas & Tarpaulins • Marine & Boat Covers • Safety Belts & Webbing Harnesses • Technical Workwear & Heavy-Duty Outerwear