Maqi LS-4420 Double-Needle Unison Feed Heavy-Duty Lockstitch Sewing Machine

Function

Sewing

Industry

Apparel, Automotive, Bags, Footwear, Furniture, Home, Luggage, Mattress, Medical, Outdoor, Purse / Leather

Maqi LS-4420 Double-Needle Unison Feed Heavy-Duty Lockstitch Sewing Machine

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Description

Maqi LS-4420 Double-Needle Unison Feed Heavy-Duty Lockstitch Sewing Machine

Heavy-duty twin-needle industrial lockstitch machine designed for high-precision parallel stitching, seam assembly, and topstitching on medium- to extra-heavyweight fabrics and dense leathers. The Maqi LS-4420 employs a synchronized unison feed (triple-feed) mechanism combining drop feed, needle feed, and alternating walking foot top feed to drive multiple layers evenly beneath the needle without material slippage, puckering, or ply mismatch. Its dual-needle configuration produces balanced, clean double-row seams essential for structural integrity and aesthetic edge-finishing. Fitted with dual large horizontal-axis double-capacity hooks, high presser lift clearance, and a safety clutch system, this machine is engineered for heavy upholstery manufacturing, automotive interior tailoring, leather bag making, and structural technical textile fabrication.

Key Features

Twin-needle unison feed (compound triple feed) system: bottom feed, needle feed, and alternating walking foot
Delivers parallel double-row topstitching with consistent stitch length and tension
Twin large horizontal-axis rotary hooks accommodate heavy-duty bonded nylon/polyester threads with increased bobbin yardage
High presser foot lift and climbing stroke smoothly transition over thick cross-seams and multiple plies
Built-in safety clutch automatically disengages hook drive during thread snarls to safeguard internal gearing and hook timing
Easy-dial stitch length regulator and large reverse lever for seam locking and backtacking
Generous underarm throat clearance provides maneuverability for bulky, wide fabric rolls and foam-laminated assemblies
Automatic oil pump lubrication system ensures steady internal oiling during continuous high-speed runs

Specifications

Brand: Maqi
Class: LS Series
Model: LS-4420 (Double Needle Unison Feed)
Stitch Type: 301 Lockstitch
Number of Needles: 2
Standard Needle Gauge: 6.4 mm (1/4″) (Optional gauges: 3.2 mm, 4.8 mm, 7.9 mm, 9.5 mm, 12.7 mm)
Feed System: Unison Feed (Bottom Feed + Needle Feed + Alternating Walking Foot)
Maximum Stitch Length: Up to 9 mm
Maximum Sewing Speed: 2,000 – 2,200 stitches/min
Presser Foot Lift: 9 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: 2 × Large Horizontal-Axis Double-Capacity Hooks
Lubrication: Automatic Centralized Pump Lubrication

Suitable For: Automotive Seats & Armrests • Double-Row Sofa & Furniture Topstitching • Leather Handbags & Briefcases • Travel Luggage & Duffle Bags • Tarpaulins & Marine Covers • Heavy Canvas Tents • Tactical Gear & Utility Backpacks • Protective Webbing & Straps

Additional information

Function	Sewing
Industry	Apparel, Automotive, Bags, Footwear, Furniture, Home, Luggage, Mattress, Medical, Outdoor, Purse / Leather

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