The Jack JK-58420B Computerized Double Needle Sewing Machine is a heavy-duty, high-efficiency industrial double needle lockstitch sewing machine designed for high-speed parallel stitching. Equipped with a straight knife automatic thread trimmer, electronic thread tension control, and a high-precision direct-drive motor, this machine delivers perfectly balanced parallel seams across both thin and thick heavy-duty materials. With its upgraded straight-knife mechanism capable of trimming fine threads up to 500D thick denim threads, the Jack JK-58420 series guarantees high productivity, minimal thread waste, and superior stitch quality for jeans, shirts, trousers, sportswear, and industrial garments.
Key Features
. Straight Knife Auto Thread Trimmer
. Electronic Thread Tension System
. One-Button Parameter Reset
. Fixed Needle Bar Precision
. Integrated Direct-Drive Motor
. Smart Panel & USB Connectivity
Technical Specifications
| Operation Type: Computerized Direct Drive Automatic |
| Max Stitch Length: 5 mm (JK-58420B Series) |
| Max Tack Stitches: Programmable Automatic Reverse & Backtacking |
| Needle System: DPx5 (11#–16# Light Duty / 14#–22# Heavy Duty) |
| Max Speed: Up to 3,000 S.P.M. (Stitches Per Minute) |
| Application: Light, Medium to Heavy-Duty Materials (Shirts, Jeans, Workwear, Uniforms) |
| Bed Type: Fixed Needle Bar Flat Bed Double Needle Machine |
| Hook Type: Vertical Axis Automatic Lubricated Rotary Hook |
| Lubrication: Automatic Centralized Oil Lubrication System |
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