Textile and leather manufacturing » Sewing Machines » Overlock Machines

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Overview

Overlock machines (sergers) are specialized sewing machines that sew seam, trim excess fabric, and finish raw edges in a single pass. They produce strong, stretch-friendly seams with multiple thread configurations (3–5 threads) and adjustable differential feed for knits. Available in home and industrial models, overlockers speed production and give garments a professional finish, especially useful for apparel, activewear, and any fabric prone to fraying.

FAQ

What should I check when buying a used overlock machine?

Inspect loopers, needles, knife blades, tension discs, and differential feed. Run the machine with different fabrics to check stitch quality, trimming, and noise. Verify motor, electrical wiring, pedal, and any included accessories. Ask for maintenance records and part availability.

Which overlock configuration is right for my projects?

Choose 3- or 4-thread machines for general seams and edge finishing; 5-thread safety stitch for extra strength. Use differential feed and narrow stitch settings for knits and stretch fabrics; heavy-duty models for denim or upholstery.

How should an overlock machine be shipped?

Securely clean and pack the machine, remove or secure loose parts and thread, protect knives and protruding components, and crate industrial units. Use a carrier experienced with sewing equipment, insure the shipment, and confirm voltage and plug type for your destination.

What regular maintenance does an overlock need?

Clean lint and dust after use, oil points per the manual, replace needles and worn blades, check belt tension, and periodically inspect timing and loopers. Schedule professional servicing for timing or electrical issues.

How can I test a used overlocker before purchase?

Run it at working speed with woven and knit samples to check stitch formation, seam strength, and trim quality. Listen for unusual noises, test the knife, pedal response, and light, and confirm smooth differential feed operation.

Are spare parts and manuals easy to find?

Availability depends on brand and age. Popular domestic and industrial brands have good aftermarket support; for older or obscure models, check online marketplaces, dealers, or service shops and request part numbers and manuals before buying.