Electronic Tension
Tension discs are electronically controlled, replacing traditional mechanical wire-cable systems. This allows for precise adjustment of response time and reaction speed to enhance stitch quality and stability.JACK JK-58720B-A-003C-Y is an advanced computerized two-needle lockstitch sewing machine for heavy-duty fabrics. Equipped with large rotary hooks, a built-in servomotor, and needle-feed fabric feeding. The model comes without a needle disconnection function and has a needle gauge of 6.4 mm. The machine features a digital presser foot lifter, a spacious workspace, a voice guidance system, and an oil level indicator to enhance usability and efficiency.
Technical Specifications
| Model | Jack JK-58720B-A-003C-Y |
| Application | Heavy-Weight |
| Function | Corner Stitch |
| Needle | DPx5 11-16# / 14-22# |
| Stitch Length (mm) | 7 |
| Needle Gauge (mm) | 6.4 |
| Presser Foot Lifting Height | 7-13 |
| Max Sewing Speed (S.P.M) | 3000 |
| Large Hook | Yes |
| Volume (mm) | 725x320x675 |
| Weight (KG) | 43/53.5 |





