JUKI LK-1903A SS Kajabutton Sewing Machine

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JUKI LK-1903A SS Kajabutton Sewing Machine Specification

Stitch Formation
lockstitch formation (ISO stitch type 301)

Voltage
240v Volt (v)

Needle
1

Stitch Length
10mm Millimeter (mm)

Warranty
1 year

Dimension (L*W*H)
1200*660*1100 Millimeter (mm)

Feed Mechanism
2-shaft intermittent feed mechanism

Sewing Speed
2700 SPM

Sewing Thickness
3.5mm

Product Type
JUKI LK-1903A SS Kajabutton Sewing Machine

Power
320w Watt (w)

Condition
Old

Stitch width
3.5

Color
white

JUKI LK-1903A SS Kajabutton Sewing Machine Trade Information

Minimum Order Quantity
1 Number

Delivery Time
3 Days

About JUKI LK-1903A SS Kajabutton Sewing Machine

TheÂ JUKI LK-1903A-SS is an industrial, computer-controlled, high-speed lockstitch button sewing machine designed for precise automated applications in modern production environments. It is primarily used for sewing round-shaped flat buttons (2-holed or 4-holed) on light to standard materials, achieving speeds up to 2,700 stitches per minute.

Key Technical Specifications

The machine's capabilities focus on high productivity and ease of use, with the following technical features as standard:

Max Sewing Speed: 2,700 stitches/min (factory set).
Sewing Area: Standard button size range ofÂ Â toÂ stitch Length: Adjustable fromÂ Â to in steps. needle Bar Stroke:Â
Built-in Patterns: Provided withÂ 50 standard sewing patterns.
Memory Capacity: Can store up toÂ 20,000 stitchesÂ andÂ
patterns.
Lubrication: Semi-dry head system with minute-quantityÂ
Advanced Features

Â Â Â Â Active Tension Mechanism: Allows operators to set needle thread tension digitally via the control panel, matching specific materials or thread types.
Auto-Lifter: Utilizes a stepping-motor system to reduce operator fatigue; the lift height can be adjusted from one-step to double-step strokes for easier material positioning.
Versatile Operation Panels: Can be operated with a standard simplified panel or an upgradedÂ IP-200B touchscreen panel.
Pattern Customization: Users can easily change the distance between button holes using the enlargement/reduction feature on the pane

Application & Productivity

Â Â Â Â Â Â This machine is frequently integrated with an automatic button feeder, such as theÂ ASK-A device, which can increase productivity by 23 times compared to manual button setting. It is widely used in industries likeÂ apparel manufacturing, specifically for high-volume production of shirts and uniform The JUKI LK-1903A-SSÂ is primarily designed forÂ standard/light materialÂ applications, but it offers significant flexibility for various thicknesses through its adjustable clamp and specialized parts.

Material & Button Thickness Specifications

The machine's capacity is defined by both the material it can hold and the thickness of the buttons it can sew:

Work Clamp Lift Height: The standard auto-lifter can be set to a maximum ofÂ . This provides ample space for positioning standard garment layers and thicker fabrics.
Standard Button Thickness: The standard configuration is optimized for buttons with a thickness ofÂ toÂ
Thick Button Capacity:Â .
Heavy Material Variant: While the "-SS" model is for standard materials, JUKI also offers theÂ LK-1903 BNBÂ variant specifically engineered forÂ heavy materialsÂ like denim or workwear.

Adjustments for Different Thicknesses

Â Â Â Â Â Â Â If you are encountering issues with material thickness, severalÂ Â Â Â Â Â Â Â Â mechanical adjustments can be made:

Needle Bar Stroke: The machine features aÂ Â needle bar strokeÂ to ensure the needle can clear thicker button-and-fabric combinations during high-speed operation.
Clamp Stroke Adjustment: The auto-lifter can be switched from a single-step to aÂ double-step strokeÂ via the operation panel, which is helpful for clearing very thick material setups during positioning.
Active Tension: You can digitally adjust the needle thread tension through the control panel to maintain seam.Â TheÂ JUKI LK-1903A-SSÂ is a heavy-duty industrial unit with specific space requirements for the machine head and its supporting table assembly. Machine Physical DimensionsÂ
The overall footprint depends on theÂ standard table andÂ
TheÂ
JUKI LK-1903A-SS
Â uses an advanced electronic feed mechanism that replaces traditional mechanical cams with digital motor control, significantly reducing maintenance and noise.

1. X-Y Electronic Feed System

The machine features aÂ 2-shaft intermittent feed mechanismÂ driven by high-precisionÂ stepping motors:

Digital Scaling: Patterns can be enlarged or reduced directly via the operation panel, adjusting the distance between button holes without changing any physical parts.

No Feed Cams: By eliminating mechanical cams and stop-motion mechanisms, the machine operates more quietly and requires less lubrication and upkeep.

2. Horizontal Forced Button-Feed (Optional/Automatic)

When equipped with an automatic feeder like theÂ BR35 or ASK-A, it uses aÂ horizontal forced feed mechanism:

Button Carrier: A carrier pin quickly and accurately sets the next button into the clamp jaw lever as soon as a sewing cycle finishes.

Anti-Jam Design: This "forced" mechanism is specifically designed to overcome button jamming caused by static electricity, a common issue with shell or plastic buttons.

Automated Discharge: Includes a mechanism to automatically clear remaining buttons from the index when switching button types

3. Active Tension and Auto-Lifter

The feeding process is supported by two other electronic mechanisms:

Stepping-Motor Auto-Lifter: The work clamp is raised and lowered by a dedicated stepping motor, allowing for programmable intermediate heights and aÂ double-step strokeÂ for thicker materials.

Needle Thread Grasping: A specialized mechanism ensures the thread is held securely at the start of sewing to provide consistent knot tying