Product Name: Jack N9 High Speed Computerized Direct Drive Buttonhole Sewing Machine
Brand: Jack
Model Number: Jack N9 / JK-T1790N9
Machine Type: Computerized Buttonhole Sewing Machine / Buttonholing Machine
Stitch Type: Lockstitch Buttonhole
Condition: New
Usage/Application: Shirt Buttonholes, Suits, Trousers, Jeans, Jackets, Workwear & Apparel Manufacturing
Suitable Fabrics: Light, Medium, and Heavy Fabrics (Cotton, Linen, Denim, Knits, Blends)
| Feature / Parameter | Technical Specification |
| Max Sewing Speed | 4200 SPM (Stitches Per Minute) |
| Max Buttonhole Length | 6.4 mm 40 mm (Extendable up to 70mm / 120mm with optional clamps) |
| Buttonhole Width | 2.5 mm 5.0 mm |
| Presser Foot Lift Height | Automatic: Up to 14 mm 17 mm |
| Pre-installed Patterns | 30+ Standard Built-in Buttonhole Shapes (Supports custom editing) |
| Needle System | DPx5 (#11 to #14) |
| Motor Type | Integrated Direct Drive Servo Motor |
| Control Interface | Large Vertical High-Definition Touch Screen Smart Panel |
| Power Consumption | 220V / 50Hz (Energy saving up to 70%) |
| Auto Functions | Auto Knife Cutter, Auto Presser Foot Lifter, Auto Thread Trimmer |
| Lubrication System | Semi-Dry / Oil-Free Needle Bar Mechanism |
Large Vertical Touch Screen Panel: Intuitive color touchscreen allows quick selection of buttonhole patterns, stitch density adjustments, size modification, and operational control.
Electronic Thread Tension Control: Digital thread tension regulation automatically adapts to varying fabric thicknesses, eliminating loose threads and stitch skipping.
Multi-Cut Knife System: Cuts buttonholes of multiple lengths without needing to physically change the knife blade, maximizing production speed.
Clean & Semi-Dry Technology: Sealed lubrication prevents oil leakage around the needle area, keeping garments clean and free from oil stains.
30+ Pre-Programmed Patterns: Comes with pre-loaded buttonhole styles (straight, bar tack, round end) and includes USB support to import custom parameters.
Direct Drive Energy Saver: Integrated high-torque servo motor ensures smooth, ultra-quiet performance while reducing electricity consumption by up to 70%.
The Jack N9 (JK-T1790N9) is an advanced, high-precision computerized buttonhole sewing machine designed for modern apparel manufacturing. Featuring a distinctive vertical touch screen display, operators can easily configure buttonhole shapes, stitch dimensions, and speed settings with a single touch.
Ideal for high-volume shirt factories, suit tailors, and denim production lines, the Jack N9 combines electronic thread tensioning with a multi-cut knife mechanism to deliver crisp, perfectly finished buttonholes on any fabric thickness. Its semi-dry head design protects fabrics from oil stains, while the direct-drive motor ensures maximum power efficiency and long-term durability.
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