
Sewing Machines
Mechanical Digital Buttonhole
Model SW 781 D
LockstitchServo
1 / 5Sewing Machines
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Mechanical digital buttonhole — the alternate variant to the SW 781 D for shops that prefer the mechanical platform with digital sizing.
Garment factories producing shirts, jackets, trousers, and workwear at high volume. Same end use as the SW 781 D; the difference is the mechanical platform under the digital control.
Shops with mechanical-platform standardization (existing parts inventory, operator training) often pick this for parts-bin commonality with their other Speedway machines. Performance is comparable to the 781 D for standard buttonhole production.
Shirt placket
6-8 buttonholes per shirt at 14mm × 3mm. Identical density and size across the entire run.
Workwear front
Heavy twill workwear with reinforced buttonholes — the bartack ends are critical for resisting daily pull.
Trousers fly
Buttonholes on trouser fly placket and waistband. Production-line cycle: place, sew, lift, advance.
Machine assembled with integrated direct-drive motor, industrial table and stand. Digital control panel.

Sewing Machines
Model SW 781 D
LockstitchServo

Sewing Machines
Model SW-9820 – Electronic Keyhole
ChainstitchServo