Computer-controlled, High-speed, Lockstitch Buttonholing Machine

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Sewing speedMax. 4,200sti/min, Normal 3,600sti/min
Needle bar stroke34.6mm
Size of cloth cutting knife6.4~31.8mm (1/4"~1-1/4")
Bartacking widthMax. 5.0mm
Buttonhole lengthMax. 41mm (optional: 120mm)
LBHS-1795: 120mm
Precision of needle throwing mechanism0.05mm
Needle thread tensionActive tension (electronic thread tension control system)
Number of stitchesAutomatically computed from the size of the buttonhole and stitch pitch
NeedleDP×5 (#11J) #11J~#14J
HookDP type, full-rotary hook
Lift of the work clamp14mm
(17mm by the reverse-rotation needle-up function)
Auto-lifterProvided as standard (stepping motor type)
Needle throwing systemStepping motor
Cloth feeding systemIntermittent feed by stepping motor
Cloth cutting knife systemBy double-acting solenoid
Number of standard patterns30 patterns
Number of patterns that can be inputMax. 99 patterns
Bobbin thread winderBuilt-in the machine head
Machine head drive systemCompact AC servomotor (direct-drive system)
Power requirement/ Power consumptionSingle-phase 220V, 230V, 240V・3-phase 200~240V/600VA
LubricationOnly the hook section needs a minute-quantity lubrication.
Lubricating oilHook: New Defrix Oil No.1 (equivalent to ISO VG7)
Total weight112kg

Excellent Performance

Cycle sewing•Continuous sewing   

  • Cycle Sewing
    20 different programs can be registered, and as many as 15 different patterns can be stored in one program.
    The machine is able to continuously sew many different patterns without requiring the work clamp foot to be lifted. As many as 20 programs can be registered, and 6 different patterns can be stored in one program. (Related parts need to be exchanged for optional ones.)

High Speed and Clean 

  • Max. 4,200sti/min, Normal 3,600sti/minsubstantially decreased.
  • Advanced dry-head technology, no lubrication is required except for the hook section. This eliminates oil stains on the sewing product.

All drive mechanism is electronically

  • An electronic control feature has been adopted for the material feed mechanism, needle rocking mechanism, needle thread trimming mechanism, bobbin thread trimming mechanism, cloth cutting knife mechanism and presser bar lifting mechanism.,
  • All adjustment values are entered as data. They can be set or stored in the memory on the operation panel.

Many functions of the pedal

  • The machine is provided as standard with auto-lifter driven by a stepping motor. This helps reduce the operator’s fatigue. As for the pedal, 1-pedal and 2-pedal modes can both be changed over and the intermediate stop, which facilitates positioning of the sewing product, can be specified.
  • The work clamp foot lift can be set as desired. The reverse-rotation needle-up function offers a maximum work clamp foot lift of 17mm.
Pedal motionPedal type
(without intermediate position)
(with intermediate position)
Initial position②Intermediate position①Maximum position①Maximum position
Setting of sewing
Presser goes up as high as pedal toe
down amount of the left side pedal.
Presser comes down when the left side
pedal is depressed.
→③Sewing position
The first step of the right side pedal
→③Sewing position
The first step of the right side pedal
→③Intermediate position

The second step of the right side pedal
→③Sewing position
Start of sewingThe right side pedal is deperssedThe second step of the right side pedalThe third step of the right side pedal
End of sewing②Presser automatically goes up to
intermediate position
①Presser antomatically goes up to
maximum position
①Presser antomatically goes up to
maximum position
Work clamp position
Purl stitching ←→ Whip stitching

(For a changeover between purl stitchand whip stitch, threading of bobbin,as well as the bobbin thread tension need to be changed.)

Single stitching → Double stitching

•For double stitching, the bartacking section is skipped and only the parallel

sections are sewn twice. This prevents any excessively tight finishes in the bartacking section of the buttonhole.

•First- and second-round stitches can be sewn using different stitch widths.

Knife sizeCloth cutting knife

Cloth cutting knife ,
Work clamp

Work clamp foot
For stitch width 5mmFor stitch
width 6mm
(for knits)
Part No.MarkPart No.
(Length of cloth cutting knife)
Part No.
6.4mm (1/4")BL724AJKAP570CJK
<1> (4×25mm)
<1> (4×25mm)
<3> (6×41mm)
9.5mm (3/8")BL724BJKB
11.1mm (7/16")BL724CJKC
12.7mm (1/2")BL724DJKD
14.3mm (9/16")BL724EJKE
15.9mm (5/8")BL724FJKF
17.5mm (11/16")BL724GJKG
19.1mm (3/4")BL724HJKH
22.2mm (7/8")BL724IJKIP571CJK
<2> (5×35mm)
<2> (5×35mm)
25.4mm (1")BL724JJKJ
31.8mm (1-1/4")BL724KJKKP574CJK
<3> (5×41mm)
<3> (5×41mm)

Игольная пластина

For needle
Standard (S)For Knits (K)
(S5: 1.4×6.2mm)
(S6: 1.4×7.4mm)
DesignationPart No.Description
Work clamp
(For sewing
length of 70
mm, 120mm)
P574JKWork clamp foot 120
P575AJKWork clamp 120
BF750JKWork clamp arm 120
BF749JKCloth feeding plate 120
BF747JKClose cam 120
BF748Lifting plate 120
SM539 (2 pcs.)Screws
P567JK-2 (2 pcs.)Screws