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JACK® C7-4-M03/333 AI Smart 2-Needle 4-Thread Industrial Overlock Sewing Machine
FULLY ASSEMBLED | TABLE, MOTOR & STAND INCLUDED
Wheels are not included and are sold separately.
AI SMART TECHNOLOGY • ADAPTIVE FEEDING • INDUSTRIAL OVERLOCK
The JACK C7-4-M03/333 is a two-needle, four-thread industrial overlock sewing machine designed for professional garment manufacturing.
Its intelligent electronic operating system is intended to assist with material feeding, presser-foot control, and sewing adjustments during industrial production.
The machine combines high-speed overlock stitching with selectable operating modes for different production requirements and operator preferences.
Operating Modes
- Manual Mode: Allows conventional pedal-controlled sewing operation.
- Semi-Automatic Mode: Uses pedal-controlled sewing with supported automatic operating functions.
- Automatic Mode: Uses electronic material detection to control supported sewing operations according to the selected machine settings.
Key Features
- AI Smart Operating System: Electronic control technology designed to assist with material handling and machine operation.
- Adaptive Material Feeding: Supports adjustments to material transport according to operating conditions.
- Intelligent Presser Foot Control: Electronic functions are designed to assist with presser-foot operation during sewing.
- Two-Needle Four-Thread Overlock: Produces overlock seams for garment assembly and fabric edge finishing.
- High-Speed Industrial Sewing: Maximum speed listed as 7,000 stitches per minute.
- Electronic Operating Modes: Provides manual, semi-automatic, and automatic operation according to the installed control system.
- Differential Feed: Allows adjustment of material feeding according to fabric characteristics.
- Adjustable Stitch Length: Supports stitch-length settings for different seam constructions.
- Integrated Servo Drive: Provides electronically controlled sewing operation.
Applications
- Sportswear manufacturing.
- Underwear and intimate apparel.
- Knit garment production.
- Elastic and stretch fabric sewing.
- T-shirts and casual apparel.
- Light-to-medium garment assembly.
- Industrial overlock seam construction.
- Professional textile production.
Important: Actual sewing capability depends on material thickness, needle selection, thread, differential-feed adjustments, and operating conditions.
Technical Specifications
| Brand | JACK |
| Model | C7-4-M03/333 |
| Machine Type | Industrial Overlock / Serger |
| Number of Needles | 2 |
| Number of Threads | 4 |
| Stitch Application | Plain Seam / Mock Safety Stitch |
| Needle System | DC × 27 |
| Needle Size | #11 — Listed Configuration |
| Needle Spacing | 2 mm |
| Stitch Width | 2 mm × 4 mm — Listed Configuration |
| Stitch Length | 0.8–4.6 mm |
| Differential Feed Ratio | 0.7–2.0 — Verify Exact Configuration |
| Presser Foot Lift | 10 mm |
| Maximum Sewing Speed | 7,000 Stitches Per Minute |
| Motor | Integrated Servo Drive |
| Operating Modes | Manual / Semi-Automatic / Automatic |
| Electronic Material Detection | Listed in Supplied Configuration |
| Adaptive Presser Foot Control | Listed in Supplied Configuration |
| Motor Voltage | Confirm With Supplied Machine |
| Motor Power | Confirm With Manufacturer |
| Included Equipment | Machine Head, Motor, Table & Stand |
| Assembly | Fully Assembled by JMJ Sewing Machines |
| Wheels | Not Included — Sold Separately |
Advantages of Intelligent Overlock Technology
- Electronic Material Control: Designed to assist with feeding adjustments during industrial sewing operations.
- Flexible Operating Modes: Allows operators to select supported manual and automatic functions.
- Production Convenience: Electronic controls can reduce repetitive manual adjustments.
- High-Speed Operation: Designed for professional garment manufacturing and industrial production.
- Four-Thread Seam Construction: Supports garment assembly and overedge finishing in one sewing operation.
Fully Assembled & Ready for Operation
Every JACK C7-4-M03/333 purchased as a complete industrial package from JMJ Sewing Machines includes the machine head, motor, table, and stand.
Our team prepares the machine through assembly, lubrication, calibration, and sewing-performance inspection before delivery or shipment.
Please Note: Caster wheels are not included in the standard machine package. They are available for separate purchase.
JMJ Sewing Machines Recommends
The JACK C7-4-M03/333 is recommended for garment manufacturers and professional sewing workshops seeking a four-thread industrial overlock machine with electronic operating controls.
Its selectable operating modes and material-feeding functions may help simplify repetitive sewing operations.
Our Recommendation: Select the appropriate needle, thread, stitch length, differential-feed settings, and machine adjustments according to your materials and production requirements. JMJ Sewing Machines can assist with determining whether this model is suitable for your specific sewing application.
Why Choose JMJ Sewing Machines?
- 30+ Years of Experience: Professional knowledge of industrial and domestic sewing equipment.
- Professional Machine Preparation: Assembly, lubrication, calibration, and sewing-performance checks.
- Equipment Selection Assistance: Guidance to help customers choose machinery suited to their sewing needs.
- English & Spanish Support: Assistance before and after purchase.
- Orlando, Florida: Local machine delivery and customer assistance.
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