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New Sewing Machines

LK-1903A, LK-1903A/BR35(with button feeder)

Computer-controlled, High-speed, Lockstitch, Button Sewing Machine



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Higher productivity.

The machine achieves sewing speed of 2,700rpm. The machine's starting, stopping, thread-trimming and automatic presser lifting speeds have been increased to significantly shorten total cycle time.
Many different sewing patterns.

The machine is provided as standard with 50 different sewing patterns. The machine permits easy changeover of sewing patterns for effortless execution of an inexhaustible range of sewing specifications.
The LK-1903A is also able to sew buttons using the same data used for the LK-1903 (EP-ROM).
Excellent seam quality.

Newly developed needle thread grasping mechanism helps produce consistent knot tying at the beginning of sewing. (This device has been factory-set to “invoking prohibited” status at the time of delivery.)
Auto-lifter mechanism utilizing a new system.

The machine is provided as standard with an auto-lifter that uses a new stepping-motor system. This helps reduce operator fatigue.
It is also possible to change over the stroke of the auto-lifter from a one-step stroke to a double-step stroke, which offers easier positioning of a material on the machine. For the double-step stroke, an intermediate stopping height can be established on the operation panel.
The work clamp foot lift can be set to a maximum of 13mm.

The sewing starting point can be corrected.

In cases where the needle entry point for button sewing is to be corrected, the sewing starting point can be corrected without the adjustment of the relevant mechanism.

Oil stains are eliminated.

Thanks to our advanced dry-head technology, the frame (needle bar and thread take-up) no longer requires lubrication. This prevents the material from being stained with lubricating oil.
Just a small quantity of clean oil is supplied from the oil tank to the hook.
The machine is provided as standard with the active tension (electronic thread tension control mechanism).

Since the machine is provided with an active tension mechanism, it is able to set a needle thread tension that matches various sewing conditions (such as thread, material and sewing speed) on the operation panel, store the data in memory and reproduce it.
The needle thread tension can be set separately according to the portion of a seam, such as the beginning of a seam, during sewing and end of the seam (fastening stitch).
When the operation panel IP-200B is used with the machine, the needle thread tension can be established on a stitch-by-stitch basis for upgraded seam quality.

Operation Panel (You can choose operation panel.)


Functional settings, such as pattern numbers and needle thread tensions can be established through the operation panel with ease. Distance between holes in a button can be easily changed by means of pattern enlargement/reduction feature.
Standard sewing patterns can be assigned to pattern keys P1 to P50. Any of the sewing patterns assigned to the P1 to P25 pattern keys can be activated with a touch of the corresponding key. This means that workability is improved by assigning 25 sewing patterns that are most frequently used to those pattern keys.
As many as 20 different cycle sewing patterns, each of which combines a maximum of 30 different sewing patterns, can be stored in the memory.
The operation panel has been installed at an angle and can be placed at the top, bottom, right or left part of the table according to the operator's preference.

A large color LCD touch panel has been adopted for the display. It gives clear displays that allow the operator to understand operating procedures.
The IP-200B panel can be connected to a personal computer and can store data on SmartMedia. This allows data to be exchanged or shared among sewing machines installed in a factory or among remote factories.
The IP-200B panel has been provided with a process improvement supporting feature through the indication of the operational state of the sewing machine, and a maintenance and management feature for indicating the needle changing timing and cleaning timing.

Model name LK-1903A LK-1903A/BR35
Max. sewing speed 2,700rpm (normal 2,500rpm)
Button size
Type: Round-shaped, flat button
Size: 8~32mm
(standard 8~20mm)
Type: Round-shaped, flat button (2-holed, 4-holed)
Size: 9~20mm
For small button: 10~15mm
For medium-sized button: 12~18mm
(Those that are smaller than 10mm or larger than 18mm must be specially ordered.)
Thickness: 1.8mm~3.5mm
Stitch length 0.1~10mm (0.1mm step)
Needle bar stroke 45.7mm
Lift of the work clamp foot Max. 13mm Max. 11mm
Auto-lifter Provided as standard (stepping motor type)
Needle thread tension Active tension (electronic thread tension control system)
Needle (at the time of delivery) DP x 17 (#14)
Hook Standard shuttle hook
Number of stitches that can be stored in memory Max. 20,000 stitches
Number of standard patterns 50 patterns
Number of data that can be input 200 patterns ( For up to 150 patterns, sewing data can be added.)
Enlarging / Reducing facility 20~200% (1% step), Pattern enlargement /
reduction can be done by increasing / decreasing the stitch length
Memory medium EEP-ROM / EP-ROM
Bobbin thread counter Provided as standard (Up / Down method)
Supplying and sorting of button - Vibration system
Button feed - Horizontal forced button-feed mechanism
Button feed mode - Automatic feed mode, non-feed mode, and small-lot sewing mode
Lubrication Hook: minute-quantity lubrication
Lubricating oil JUKI New Defrix Oil No.2 (equivalent to ISO VG32)
Sewing machine motor 450W compact AC servomotor (direct-drive system)
Power consumption 320W 350W
Weight Machine head (include motor) 42kg,
Control box 16.5kg
115kg (include machine head, table and BR35)

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