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JACK® C7-4-M03 overlock industrial sewing machine

JACK · Overlock

JACK® C7‑4‑M03

JACK® C7-4-M03/333 – 4-Thread AI Overlock Machine – Complete Setup, Table & Stand Included

The JACK® C7-4-M03/333 is an AI-powered 4-thread overlock machine designed for professional garment production. Part of JACK's C7 Urus A.

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Pricing, configuration, and ordering on the Shopify store.

Performance

Max Speed
7,000 SPM
Stitch Length
0.8–3.8 mm

Capacity

Needle System
DCx27 / B27, Size #9–16
Number of Needles
2
Presser Foot Lift
10 mm

Automation

Drive Type
Direct Drive
Lubrication
Automatic

Physical

Machine Type
4-Thread Overlock / Serger
Motor
550W Direct Drive Servo Motor
Stitch Width
4 mm
Differential Ratio
0.7–2.0
Feed Type
Drop Feed
Construction
Flatbed
AI Technology
A.M.H. (Automatic Material Handling)

Manufactured by

Jack. 30+ years of industrial sewing.

Why Jack →

Detail

How it runs on the floor

The JACK® C7-4-M03/333 is an AI-powered 4-thread overlock machine designed for professional garment production. Part of JACK's C7 Urus A.M.H. series, it automatically senses fabric properties in real time — adjusting feeding, pressure, and tension without manual intervention — delivering consistent, production-ready seams across knits, wovens, and denim. This complete setup includes the machine head, 550W direct drive servo motor, industrial table, and stand, ready to run from day one.

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What's Included

  • JACK C7-4-M03/333 4-thread AI overlock machine (ships assembled)
  • Fully submerged industrial sewing table
  • Industrial stand with motor mount
  • 550W direct drive servo motor
  • LED work lamp
  • Standard accessories kit
  • Instruction manual

Key Features

  • A.M.H. AI Technology — three operating modes (Manual, Semi-Automatic, Fully Automatic) with real-time fabric sensing
  • Full Speed Feeding System — continuously balances pressing and feeding forces at any speed for even seam quality
  • Smart Presser Foot — detects pressure changes 32,000 times per second with 0.00006 microsecond response time
  • Smart Rhino Feeding — 9.2 Nm super torque with degree-by-degree feeding control for consistent stitch quality
  • Automatic thread trimmer, foot lifter, reverse, and needle positioner
  • Maximum speed: 7,000 SPM

Ideal For

  • High-volume garment manufacturing requiring AI-driven consistency
  • Knitwear, activewear, and stretch fabric production lines
  • Factories transitioning from manual to automated overlock operations
  • Operations requiring consistent seam quality across varying fabric weights

Questions

Before you buy

Quick answers to the questions buyers ask most about Jack industrial machines. For pricing, configuration, and live availability, the Shopify product page is always the source of truth.

How do I get current pricing for this Jack model?

Pricing and live availability are handled on the Shopify store. Tap 'View on Shopify' above to see the current price, configuration options, and delivery estimates for your zip code.

Does the machine ship as a complete setup?

Most Jack industrial models ship as complete production setups: head, servo motor, table, and stand. The product description above lists exactly what's included for this specific model.

What kind of warranty does Jack provide?

Every Jack machine carries a manufacturer warranty against defects in materials and workmanship. Authorized US dealers also provide local service and parts support. See the Shopify product page for the warranty terms specific to this model.

Are genuine Jack replacement parts available?

Yes. Original Jack feed dogs, hooks, gauge sets, presser feet, and electronics are stocked and traceable to the manufacturer. The Service & Parts page lists parts categories; the Shopify store carries the active SKUs.

Where is service available in the United States?

Authorized service technicians work nationwide through Jack's US dealer network. The Service & Parts page explains how coverage works, and each model's Shopify listing routes you to the dealer closest to your production floor.

Other Overlock machines

JACK® C7‑4‑M03

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