Flagship high performance single step intelligent computer sewing machine
Rotational speed : 5000
Machine needle : DB*1#9-18
Needle gauge : 0-7
Foot Height : 5.5-15
Weight(kg) : 46kg

High speed flat head keyhole machine(RJ-781)




Buttonhole machine

Product name

High speed flat head keyhole machine

Stitch type

Lock stitch



Number of stitches

Single needle

Number of machine heads

Single head

Number of lines

Single line

Scope of application

Thick and thin material

Driving form


Applicable Institute


Degree of automation

Fully automatic

Packing volume


Packing weight


Technical features:

A number of technical improvements have been made to the buttonhole sewing machine, which improves the stability, expands the application range of fabrics, especially improves the sewing quality of knitted fabrics, and greatly improves the efficiency. Thread cutting mechanism, speed change mechanism, gear transmission, toothed presser foot, automatic oil feeding, flexible presser foot lifting, automatic cutter structure, flat and triangular stitches can be sewed, the stitches are firm and beautiful; the sewing speed is high, the length, width and number of stitches of button hole are adjustable; automatic lubrication system and automatic thread cutting device are set.

Applicable object:

It is suitable for buttonhole lock of all kinds of knitting, cotton spinning, chemical fiber and other fabrics. It is suitable for thin, medium and thick materials.