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JACK® JK-A4C-C AI Smart Single Needle Direct Drive Automatic Industrial Lockstitch Sewing Machine
The JACK® JK-A4C-C is a computerized single-needle industrial lockstitch machine for garment manufacturing, tailoring, alterations, and other professional straight-stitch applications.
Its integrated direct-drive servo motor and electronic controls support efficient sewing with automatic thread trimming, backtacking, needle positioning, and presser foot lifting.
The supplied configuration features NTB (No Thread Breaking) technology, Octopus Nine-Brain AI, a single-knife thread trimmer, stepper motor control, and a DLC-coated rotary hook.
JMJ Sewing Machines supplies this machine as a complete industrial workstation. Our technicians assemble, inspect, adjust, and sewing-test the machine before delivery.
FULLY ASSEMBLED | TABLE, MOTOR & STAND INCLUDED
Professionally assembled, adjusted, and sewing-tested by JMJ Sewing Machines before delivery.
Key Features
- Single-Needle Lockstitch: Straight 301 lockstitch construction for professional garment sewing.
- Direct-Drive Servo Motor: Integrated motor with electronic speed control; the supplied controller is rated at 550W.
- NTB and Octopus Nine-Brain AI: JACK technologies designed to support thread handling and coordinated machine operation.
- Zero-Degree Thread Technology: Specialized thread-handling design intended to reduce interruptions during sewing.
- Stepper Motor Control: Electronic adjustment of stitch length and presser foot lifting.
- Automatic Thread Trimming: Single-knife thread trimmer reduces manual cutting between sewing operations.
- Automatic Backtacking: Programmable reverse stitching reinforces the beginning and end of seams.
- Automatic Presser Foot Lift: Helps operators position and remove fabric conveniently; this configuration does not include a presser foot sensor.
- Electronic Needle Positioning: Selectable needle stopping position.
- DLC-Coated Rotary Hook: Wear-resistant hook surface for industrial sewing applications.
- LED Work Light: Illumination at the sewing area.
- Complete Sewing Station: Machine head, integrated motor, table, and metal stand included.
Applications
Recommended for straight-stitch garment production and professional work with appropriately selected light-to-medium fabrics.
- Shirts, blouses, and uniforms
- Trousers, dresses, and casual apparel
- Garment manufacturing and assembly
- Professional tailoring and alterations
- Light-to-medium woven fabrics
- Selected synthetic fabric blends
- Commercial straight-stitch workshops
Professional Straight-Stitch Production
The JK-A4C-C combines computerized control with automatic sewing functions to streamline repetitive production steps.
Performance depends on material construction, thread, needle, machine settings, and operating conditions.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | JACK® |
| Model | JK-A4C-C |
| Machine Category | Computerized Industrial Lockstitch |
| Stitch Type | 301 Single-Needle Lockstitch |
| Needles / Threads | 1 Needle / 2 Threads |
| Needle System | DB × 1 |
| Needle Size Range | #11–#18 (listed configuration) |
| Maximum Sewing Speed | Up to 5,000 Stitches Per Minute (listed specification) |
| Maximum Stitch Length | 5 mm (listed specification) |
| Presser Foot Lift | 5–13 mm (listed specification) |
| Material Application | Light-to-Medium Fabrics |
| Motor System | Integrated Direct-Drive AC Servo Motor |
| Rated Motor Power | 550W |
| Rated Voltage | 110V |
| Frequency | 50/60 Hz |
| Maximum Motor Speed | 5,000 RPM (motor specification) |
| Intelligent Technologies | NTB / Octopus Nine-Brain AI / Zero-Degree Thread Technology |
| Stepper Motor Control | Yes |
| Automatic Thread Trimming | Single-Knife System |
| Automatic Backtacking | Yes |
| Automatic Presser Foot Lift | Yes |
| Presser Foot Sensor | Not Included |
| Electronic Needle Positioning | Yes |
| Rotary Hook | DLC-Coated |
| LED Work Light | Yes |
| Machine Head Dimensions | 695 × 295 × 550 mm (listed specification; confirm unit) |
| Net / Gross Machine Weight | 36 / 42 kg (listed specification; not shipping weight) |
| Machine Setup | Complete with Table, Motor & Stand |
| Wheels | Not Included — Sold Separately |
Included with the Machine
- JACK® JK-A4C-C industrial sewing machine head
- Integrated direct-drive servo motor
- Industrial sewing machine table
- Heavy-duty metal stand
- Installed electronic control system
- Standard manufacturer-supplied accessories
JMJ Complete Setup
The machine is assembled and adjusted by our technical team before delivery. This preparation helps customers receive equipment ready for its intended sewing applications.
JMJ Quality Inspection
JMJ Sewing Machines prepares industrial sewing equipment through a technical inspection process focused on machine operation and sewing performance.
Depending on the equipment and configuration, our inspection includes:
- Visual inspection of machine and components
- Verification of motor and electronic controls
- Needle and thread-path inspection
- Presser foot and automatic function checks
- Stitch formation and sewing performance testing
- Final adjustment and preparation before delivery
Our technicians prepare the machine for professional use according to its intended sewing applications.
JMJ Sewing Machines Recommends
JMJ recommends the JACK JK-A4C-C for tailoring, alterations, and garment production requiring automated straight-stitch operation on suitable light-to-medium materials.
The integrated motor, thread trimmer, and electronic controls support efficient repetitive sewing tasks.
Before purchasing, customers can consult our technical team about fabric compatibility, thread selection, needle requirements, and production needs.
Warranty & Technical Support
Warranty requests and technical assistance are handled directly by JMJ Sewing Machines.
Warranty coverage is provided according to the applicable terms and conditions supplied with the machine.
For covered manufacturing defects, JMJ provides replacement parts and labor in accordance with the applicable warranty.
Electrical and electronic components are subject to applicable exclusions to the extent permitted by law.
Manufacturer warranties and applicable legal rights remain in effect.
Preliminary technical assistance may be available through video consultation. Certain repairs require an in-person technical inspection.
Spare Parts & Accessories
JMJ Sewing Machines can assist customers with identifying replacement parts and accessories suitable for their industrial sewing equipment.
- Industrial sewing machine needles
- Bobbins and bobbin cases
- DLC-compatible rotary hook components
- Presser feet, needle plates, and feed dogs
- Thread tension components
- Mechanical and electronic replacement parts
Compatibility and availability must be confirmed before ordering.
Important Before Ordering
Complete Machine: This industrial sewing machine is supplied with its table, motor, and metal stand.
Electrical Configuration: JMJ supplied operating voltage: 110V.
Material Compatibility: The appropriate needle, thread, and machine settings depend on the material being sewn.
Wheels: WHEELS ARE NOT INCLUDED — SOLD SEPARATELY.
Wheels shown in showroom photographs, when applicable, are used to move equipment and are not included with the machine.
In-Store Purchases: Customers purchasing machines at our physical store receive a brief in-person explanation of basic machine controls at delivery.
Shipped Orders: Shipped orders do not include in-person operator training.
Returns & Store Policies
Eligible voluntary returns may be requested within 14 calendar days, subject to the applicable JMJ Sewing Machines return policy.
Approved voluntary returns are subject to a 20% restocking fee.
Claims involving covered defects and applicable legal rights are handled separately under the relevant warranty and laws.
Contact JMJ Sewing Machines
JMJ SEWING MACHINES
Industrial Sewing Machines, Parts, Accessories, Repairs & Technical Support
Location: Orlando, Florida
English: 407-451-7450
Español: 321-374-2407
Website: jmjsewingmachines.com
Our technical team can help you choose equipment that matches your sewing and production requirements.