1-needle, Lockstitch Buttonholing Machine

The B-1M Series buttonhole machines produce consistent quality seams and are widely adaptable to many different kinds of materials and seam specifications.

Product overview

Product features

  • The control box is integrated into the head

    The control box is integrated with the head of the sewing machine, making it easy to set up and use.
    The B-1M Series adopt the direct drive system. As a result, Quietness of the sewing machine during sewing is ensured by the direct-drive motor.
    The sewing machine starts up swiftly and promises increased stop accuracy, thereby demonstrating improved responsiveness.

  • Comfortable working environment

    The knife mechanism and stop-motion mechanism produce less noise when they actuate, thus contributing to a more comfortable working environment. Thanks to the simple design of the stop-motion mechanism and unique knife mechanism, the machine operates with low noise. The machine starts, decelerates and stops smoothly.


Basic performance

  • Lift of the work clamp

    The work clamp foot height can be increased up to 12 mm, enabling the machine to make high-quality buttonholes in heavy-weight materials. The lifting of the work clamp is driven by a motor, which reduces operator work. The operation can be easily done with one pedal.

  • LED light

    The LED light is located on the underside of the arm jaw. It is provided as standard for all models of the B-1M Series. It reduces operator fatigue and improves work efficiency.
    In addition, this needle drop point can be easily visually observed. This permits easy positioning of buttonholes.

  • Sewing settings can be easily changed

    This machine is capable of forming two different types of stitches, namely whip stitch and purl stitch.

  • Standard operation panel

    The sewing machine has been integrated with the operation panel and the control box for ease of use. The operation panel has a simple design that allows the user to adjust the origin position of the feed
    cam and change the sewing speed.

  • Changing the number of stitches

    The gears are ibcluded in the standard accessories.
    ● Spur gears
    By selecting the spur gears, your can control the number of stitches as shouwn in the table. Use a combination of gears which have the samealphabetical marks.
    The numeral engraved on the gear installed in the rear position will represent the number of stitched provided by the then combination of spur gears.




Model name B-1M781S B-1M783S
Application Standard
Max. sewing speed 3,600sti/min* (Factory default: 3,300sti/min*)
Needle bar stroke 34.6mm
Lift of the work clamp 12mm
Thickness of material that can be used 4mm (with the work clamp lowered)
Number of stitches 83~225 (by gear-change method)
Length of buttonholes 22mm 40mm
Needle DP×5 #11~#14
Hook DP type, automatic-lubricating full-rotary hook
 Lubrication Automatic
Lubricating oil Sewing machine oil #10 (ISO VG10)
Power supply / Power requirement Single-phase 220V
Power consumption 366VA
Weight Machine head (include motor) 50kg

*sti/min is the abbreviation for “stitches per minute”