Jack W4

High Speed Computerized Flat-bed Interlock Machine


A series of modern, 3-needle interlock machines with a flat bed, equipped with an energy-saving motor mounted in the head (Direct Drive system), which guarantees quiet and reliable operation and lower power consumption. Machines designed to roll up the pits in blouses and other knitwear, stitching (need a bind), stitching overlock stitching, decorative stitching and many other operations.  The bottom differential transport ensures a high quality stitch, even with very inconvenient Lycra materials. The machine is equpped in LED lighting (with the possibility of 3-level adjustment of light intensity).

Available subclasses:

  • JACK W4-D-01GB –  interlock machine (standard) without automatic functions
  • JACK W4-D-02BB – interlock machine in subslass for tape-binding
  • JACK W4-UT-01GB – interlock machine with automatic functions

Technical parameters:

  • sewing speed up to 5500 stitches / min
  • presser foot lift up to 7 mm
  • standard needle gauges: 5.6 mm or 6.4 mm (optionally – option of another gauges)
Categories: ,

Automatic Thread Trimmer (UT)

Upper and lower thread trimmers: the life of the scissors is longer, with less hassle and high efficiency – 100% accuracy

For Light And Heavy Duty

Expand sewing range, suitable for various fabrics.

Voice Guide

Using the machine it will teach you the various functions itself, if there are errors it will notify you and by clicking the VOICE button it will suggest how to solve the problem, moreover with a single key you can return to the initial settings. (Only on -UT)


Normal sewing, tape binding and bottom hem sewing.

Integrated Design

Mechanical and electronics come together in a clean design without wiring but integrated.