Product Introduction

SP-1790B-S/K/SL

Flat Buttonhole Sewing Machine

  • SP-1790B-S
  • SP-1790B-K
  • SP-1790B-SL

Advantages

  • Lower noise and malfunction of cutting knife
  • Convenient operation
  • Improve stability and efficiency
  • Lower temperature and avoid wrong position
  • Motor pressing,stable and accurate material stitching

Automatic production

  • Electric tension device
  • Multifunction operation control panel
  • New pulling thread-slacking device (which has been applied for the national patent)
  • Oil-free clean sewing
  • Simple and convenient operation,simple and accurate orientation
  • New base thread and surface thread cutting device (which has been applied for the national patent)

New device 1

New pulling thread-slacking device (which has been applied for the national patent)

New device 2

New base thread and surface thread cutting device (which has been applied for the national patent)

Technical Parameters

Model and Standard +

  • Model
    Sewing speed
    Needle bar stroke
    Size of cutter
    Width of noose
    Length of keyhole seam
    Needle thread tension
    Mount of stitches
    Machine needle(equipment model while delivered)
    Original Type
    Rising volume of foot presser
    Automatic lifting and pressing foot device
    Drive mode of needle sewing
    Drive mode of feeding
    Drive mode of cutter
    Number of standard pattern
    Number of memorable pattern
    Coiling device of down thread
    Drive model of machine head
    Electricity/electricity consumption
    Refuel mode
    Engine oil
    Weight
  • SP-1790B-S
    The highest: 4,200rpm; In common use: 3,600rpm; While using no-refueling rotating shuttle(selected and purchased): 3,300rpm
    34.6mm
    6.4~31.8mm(1/4″~1-1/4″)
    The maximum 5mm(parts with special specification: The max. 10mm)
    The maximum 41mm(parts with special specification: The max. 120mm)
    Tension of clamping(electric line tension unit)
    Size of keyhole is calculated automatically via sewing distance.
    DPx5(#11J)#11J~#14J
    DP full-rotating shuttle; Refueling free shuttle (optional)
    14mm(Reversing side 17mm)
    Standard equipment(pulse motor type)
    Pulsemotor drive
    Pulse motor intermittent feed
    Motor drive
    30 patterns
    99 patterns at most
    Head built-in
    Small AC servo motor (direct drive)
    Single phase 220V~240V/1000VA
    Microscale refueling in parts with rotating shuttle; No-refueling while using no-refueling rotating shuttle(selected and purchased)
    Parts with rotating shuttle: engine oil(equals to ISO Vg7)
    75kg
  • SP-1790B-K
    The highest: 4,200rpm; In common use: 3,600rpm; While using no-refueling rotating shuttle(selected and purchased): 3,300rpm
    6.4~31.8mm(1/4″~1-1/4″)
    The maximum 5mm(parts with special specification: The max. 10mm)
    The maximum 41mm(parts with special specification: The max. 120mm)
    Tension of clamping(electric line tension unit)
    Size of keyhole is calculated automatically via sewing distance.
    DPx5(#11J)#11J~#14J
    DP full-rotating shuttle; Refueling free shuttle (optional)
    14mm(Reversing side 17mm)
    Standard equipment(pulse motor type)
    Pulsemotor drive
    Pulse motor intermittent feed
    Motor drive
    30 patterns
    99 patterns at most
    Head built-in
    Small AC servo motor (direct drive)
    Single phase 220V~240V/1000VA
    Microscale refueling in parts with rotating shuttle; No-refueling while using no-refueling rotating shuttle(selected and purchased)
    Parts with rotating shuttle: engine oil(equals to ISO Vg7)
    75kg
  • SP-1790B-SL
    The highest: 4,200rpm; In common use: 3,600rpm; While using no-refueling rotating shuttle(selected and purchased): 3,300rpm
    34.6mm
    6.4~31.8mm(1/4″~1-1/4″)
    The maximum 5mm(parts with special specification: The max. 10mm)
    The maximum 41mm(parts with special specification: The max. 120mm)
    Tension of clamping(electric line tension unit)
    Size of keyhole is calculated automatically via sewing distance.
    DPx5(#11J)#11J~#14J
    DP full-rotating shuttle; Refueling free shuttle (optional)
    14mm(Reversing side 17mm)
    Standard equipment(pulse motor type)
    Pulsemotor drive
    Pulse motor intermittent feed
    Motor drive
    30 patterns
    99 patterns at most
    Head built-in
    Small AC servo motor (direct drive)
    Single phase 220V~240V/1000VA
    Microscale refueling in parts with rotating shuttle; No-refueling while using no-refueling rotating shuttle(selected and purchased)
    Parts with rotating shuttle: engine oil(equals to ISO Vg7)
    75kg

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