Flat Buttonhole Sewing Machine


SP-1790DS-S/K/SL Flat Buttonhole Supreme Sewing Machine

Advantages of flat Buttonhole sewing machine 

  • The knife is driven by a motor to reduce the noise and failure
  • Improve stability and efficiency
  • Motor pressing ,stable and accurate material stitching
  • Convenient operation
  • Lower temperature and avoid wrong position.
  • Optional function: could add the auto feeding device, make sure the buttonholes more accurate


  • Solenoid driven knife
  • Slow thread cutting
  • Spring driven pressing
  • Icon display interface
  • Five-phase motor


  • Mechanical/electrical integrated design
  • Motor driven knife
  • Improved electric control parameter fast thread cut Motor driven pressing
  • Teletext interface
  • Close circuit step motor






Operation panelTouch panel
Sewing speed4200 rpm in common use ,3300 rpm while using no-refueling shuttle
(selected and purchased )
Size of cutter6.4 – 31.8mm (1/4” -1/4”)
Width of bartackThe maximum 5mm (parts with special specifications : The max 10 mm)
Length keyhole seamThe maximum 41 mm (part with special specifications :The max 120 mm)
Needle thread tensionTension of clamping electrical line tension unit

Machine needle (equipment model while delivered)

Dpx5 11-14
Shuttle typeDP full-rotating shuttle  Refueling free shuttle(optional )
Rising volume of foot presser14 mm (17 mm Reversing side)
Automatic lifting and pressing foot deviceStandard equipment (pulse motor type)
Drive mode of cutterMotor drive
Number of standard pattern31 pattern
Number of Memorable pattern99 pattern
Coiling  device of down threadHead built-in
Drive model of machine headSmall Ac servo motor(Direct drive)
Electricity / Electricity Consumption(Single phase) 220v-240/1000 VA
Refuel modeNo-refueling while using no-refueling shuttle(selected and purchased)
Engine oilparts with rotating shuttle: engine oil(equal to ISO Vg7 )
Weight60 kg


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