Jack Sewing Machines · Lockstitch

Straight stitch.
Serious intelligence.

Six lockstitch machines, from the AI-driven AMH2 flagship down to focused single-purpose heads for edge cutting and chain stitching. Every one built to keep a single needle running at full speed, all shift long.

14 Years World No.1 · Flagship Lockstitch

Unlock the potential
of all fabrics.

AMH2 pairs an Octopus Dual-Core AI chip with a Vigorous Ape Dual-Drive motor to sense fabric and seam changes as they happen, then re-tune penetration force and feeding force in real time, so the machine keeps sewing without stopping to readjust, whatever the fabric.

  • Octopus Dual-Core AI chip: 22 million device data models and 100,000 operations per second
  • Vigorous Ape Dual-Drive motor: 4× faster response, 11.3Nm peak torque
  • Effortless 18-layer denim stitching, penetrates 100 sheets of A4 plus 10 layers of copper
  • Oil-free head keeps the machine and the fabric clean, shift after shift
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Jack AMH2 AI lockstitch sewing machine
5000 spmMax speed
DBx1 11-18#Needle
5mmStitch length
Oil-freeHead design
A5E-B
Standard, 5mm stitch, 5000 spm
A5E-B-N
Needle-feed variant
A5E-B-H-7
Heavy material, 7mm stitch
A5E-B-7
Long stitch, 4500 spm
More Lockstitch Machines

Five more ways to sew straight.

From cross-seam speed to edge-cutting and chain stitching, each head below is built for a specific job on the line.

Jack A2C lockstitch machine
Lockstitch
A2C
Cross-seam Thick material

Full-speed over cross joint. Mighty Ape Platform motor and Fortress Electric Control pierce 100 layers of paper, lifting cross-seam handling by 14% and overall efficiency by 3.7%.

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Jack A4C lockstitch machine
Lockstitch
A4C
One day one threading NTB system

An Octopus Nine-brain AI chip works with 0-degree Thread Path Technology to cut thread tension by 30%, reducing thread breakage by 80% and lifting output by around 5%.

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Jack A6F-E lockstitch machine
Lockstitch
A6F-E
Needle feed Computerized

A computerized needle-feed lockstitch head built for consistent stitch quality on multi-layer and heavier panels, with the same digital control panel across the range.

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Jack JK-5559F-W edge cutter lockstitch machine
Lockstitch
JK-5559F-W
Edge cutter Shirts & jackets

Computerized edge-cutter lockstitch machine with stepping motor stitch control, noiseless reverse sewing and a 26mm blanking space for shirts, suits, pants and down jackets.

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Jack JK-8558G chain stitch machine
Lockstitch
JK-8558G
Chain stitch Power saving

Power-saving chain stitch machine with an oil-free head and rear puller, available in single, double and triple-needle configurations for denim, T-shirts and umbrellas.

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