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Jack A4S-H Computerized Semi-Dry Lockstitch

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JACK A4S-H Computerized Semi-Dry Lockstitch (Heavy Duty)

Here it is a brand new Computerized Lockstitch designed machine for the 21st century.

Operational Panel is easy to understand, No Need to be Afraid of the parameters.

Direct Drive Motor, With cooling fan decreases the temperature of the motor, extending the lifetime of the machine,

(She’ll be running for years)

Oil is stored in the sealed pan which is integrated into the machine head, effectively prevents oil leakage and oil staining.

User – Friendly German design. Half Stitch, back stitch and 3 Led light setting Auto Foot Lift, trims the cotton, runs in oil. 

Integrated System Clean and Safe. All connections & plugs of the control box are well located & tidied up at the back. 

Equipped with auto foot lift, auto underbed trimmer, auto backtack, stitch counter and fully lubricated with sealed oil pad.

Optimized thread take-up and feeding mechanism enlarge the sewing range, suitable for various kinds of fabrics like jeans, yarn, and lace.

Voice command and USB port to plug in your phone, small fan, etc, and also to access upgrades for A4’s software in the future.

Oh! We think this lockstitch is well designed & well put together.

Each operation has voice command guidance…


JACK A4S-H Computerized Semi-Dry Lockstitch (Heavy Duty)


Model Needle Thread Stitch Sewing Material
Number Length (mm) Speed (s.p.m) Thin Med Heavy
A4S DBx1 11-18 2 5 5000 x x
A4S-H DPx5 18-21 2 5 3500 x
A4S-7 DBx1 11-18 2 7 3500 x x
A4S-7H DPx5 18-21 2 7 3500 x
A4S-N DBx1 11-18 2 5 5000 x x
A4S-W DBx1 11-18 2 5 5000 x x
A4S-WN DBx1 11-18 2 5 5000 x x

More specifications of the above models are also available.



Additional information

Weight 65000 g

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