MACHINE NAME: FLATBED/PLAIN TYPE SINGLE NEEDLE SEWING MACHINE 

MODEL NO: SB-1891P

BRAND: SHIBANG

FEATURES

• Stepper motor controls feeding, and the reinforcement stitching performance is excellent and stable.
• Forward and reverse seam three synchronous feeding, superior reverse seam climbing ability
• Pitch programmable control for easy handling of sewing process requirements
• Up and down differential feeding function, low misalignment rate, ensuring sewing material quality 
• The error rate of high and low speed needle gauge variation is small
• It adopt LCD operation panel, easy to operate visually
• No need for a second manual thread trimmer, high efficient and good benefits.

FUNCTION

• Counting function, bottom thread detection, automatic reverse sewing, automatic thread trimming, automatic presser foot lift, one-piece design.

USAGE AND SPECIFICATION

• For riding boots, sports shoes, work shoes, casual shoes, sponge shoes, baby shoes, High quality leather shoes.

TECHNICAL PARAMETER

1. Model                              : SB-1891P
2. Sewing the material type : Drive Motor  
3. Sewing speed                  : 200-2000rpm
4. The foot to promote        : 7/8mm
5. Max. needle pitch           : 0-5.0mm
6. Operating Voltage           : 200-220V
7. Rated power                   : 750W

The Shibang-1891P Flat Type Single Needle Sewing Machine is a high-performance industrial sewing machine designed specifically for flat materials, offering precision, speed, and reliability. Ideal for medium to heavy-duty fabrics, it is widely used in garment manufacturing, upholstery, automotive interiors, and other industries requiring durable and neat stitching on flat surfaces.Known for its robust construction and ease of operation, the Shibang-1891P combines advanced mechanics with user-friendly features, making it an essential tool in modern textile and manufacturing production lines.

Technical Specifications

• Machine Type: Flat Bed Single Needle Lockstitch Sewing Machine

• Needle System: Industrial single needle system (commonly DBx1 or 135x17)

• Max Sewing Speed: Up to 5000 stitches per minute (depending on material and setup)

• Stitch Length: Adjustable, from 0 to 5 mm

• Needle Bar Stroke: Approximately 31.8 mm

• Presser Foot: Adjustable pressure with a standard presser foot suitable for a wide range of materials

• Feed System: Drop feed with a reliable feed dog mechanism for consistent fabric movement

• Motor: High-efficiency servo motor (optional), or clutch motor standard

• Lubrication: Automatic lubrication system to maintain smooth operation and extend machine life

• Power Supply: 220V / 380V, 50/60 Hz (depending on region)

• Weight: Approximately 40-50 kg (machine head only)

• Table: Compatible with standard industrial sewing machine tables or optional custom tables

• Accessories: Includes multiple presser feet, bobbins, needle sets, and maintenance tools

Key Features

Flat Bed Design

The flat bed design allows for easy handling of flat materials such as denim, canvas, leather sheets, synthetic fabrics, and others. It supports smooth fabric feeding and maneuvering, reducing operator fatigue during extended use.

Single Needle Lockstitch

The single needle lockstitch system provides strong, durable stitching, widely recognized for its reliability in garment production and upholstery work. This stitch type is ideal for seams that require high tensile strength.

High Sewing Speed with Stability

The Shibang-1891P offers high-speed sewing capability up to 5000 stitches per minute, enabling efficient production without sacrificing stitch quality or machine stability.

Adjustable Stitch Length

Operators can easily adjust stitch length for different fabric types and design needs, offering versatility for various sewing applications.

Automatic Lubrication

An integrated lubrication system ensures essential machine parts are constantly oiled, reducing wear and tear and minimizing maintenance downtime.

User-Friendly Operation

The machine includes ergonomic controls for stitch length, presser foot pressure, and speed regulation (especially with servo motors). This improves operator comfort and productivity.

Energy-Efficient Servo Motor (Optional)

Models equipped with servo motors offer reduced energy consumption, quieter operation, and more precise control over sewing speed compared to clutch motor versions.

Applications

The Shibang-1891P is versatile and finds use across multiple industries:

• Garment Manufacturing: Ideal for sewing shirts, trousers, jackets, uniforms, and heavy fabrics like denim and canvas.

• Upholstery: Used for stitching upholstery materials such as leather, synthetic leather, and heavy-duty fabrics on furniture and automotive interiors.

• Footwear Industry: Suitable for sewing leather components and fabric uppers.

• Bags and Luggage: Stitching heavy textiles and leathers in bag production, backpacks, and suitcases.

• Textile Crafts: Perfect for quilting, patchwork, and other textile craft applications requiring precise lockstitch.

Benefits and Advantages

Durability and Reliability

Constructed with high-quality steel and precision parts, the Shibang-1891P is designed for long-term industrial use with minimal breakdowns.

Efficiency in Production

High-speed stitching combined with smooth fabric feed reduces production cycle times and increases output.

Consistent Stitch Quality

The flat bed and drop feed system maintain consistent stitch formation, reducing fabric distortion and uneven seams.

Maintenance Ease

With its automatic lubrication and modular parts, the machine requires minimal daily maintenance. Operators can perform basic servicing easily, keeping downtime low.

Versatility

Supports a wide variety of materials, thicknesses, and applications, making it a multi-purpose solution for sewing workshops and factories.

Operating Instructions

Setup

• Mount the machine on a sturdy industrial table.

• Install the appropriate needle and presser foot for the material.

• Adjust stitch length and presser foot pressure.

• Thread the machine according to the user manual, ensuring proper tension.

• Wind and load the bobbin.

Sewing

• Start the motor at a low speed to test fabric feed.

• Increase speed gradually while maintaining control.

• Guide the fabric gently without forcing it to avoid needle breakage.

• For thick materials, adjust presser foot pressure accordingly.

Maintenance

• Check lubrication points daily; refill oil reservoir as needed.

• Clean feed dog and needle plate regularly to remove lint.

• Inspect needle condition and replace if bent or dull.

• Tighten screws and check belt tension monthly.

• Schedule professional servicing every 6 months for optimal performance.

Comparison with Similar Models

Industry Feedback and Testimonials

Factory Manager, Apparel Manufacturer: “The Shibang-1891P has improved our production speed significantly. Its reliability and ease of maintenance have reduced downtime and maintenance costs.”

Upholstery Workshop Owner: “We rely on the Shibang-1891P for sewing tough leather hides. The machine handles thick materials without hesitation, and the stitch quality is consistently excellent.”

Troubleshooting Common Issues

• Skipped Stitches: Check needle condition and replace if bent. Re-thread machine ensuring proper tension.

• Needle Breakage: Avoid forcing thick fabrics; adjust presser foot pressure. Use correct needle size and type.

• Fabric Not Feeding Properly: Clean feed dog; check feed dog height and adjust if necessary.

• Oil Leakage: Inspect lubrication points and avoid overfilling oil reservoir.

• Motor Not Responding: Verify electrical connections and power supply; consult a technician if servo motor fails.

Safety Considerations

• Always switch off and unplug the machine before performing maintenance.

• Use protective gear (gloves, safety glasses) when operating heavy-duty machines.

• Keep fingers away from needle area during operation.

• Ensure proper grounding and electrical safety compliance.

Accessories and Optional Add-ons

• Different presser feet for specialized sewing tasks (zipper foot, roller foot).

• Extension tables for handling larger workpieces.

• Servo motor upgrades for energy-efficient operation.

• Automatic thread trimming attachments.

• Knee lifters for hands-free presser foot control.

The Shibang-1891P Flat Type Single Needle Sewing Machine is a robust, versatile, and efficient industrial sewing solution tailored for medium to heavy-duty fabric applications. Its combination of speed, precision, and ease of use makes it a valuable asset across multiple industries, from apparel manufacturing to automotive upholstery. With solid construction, advanced features like automatic lubrication, and optional energy-saving motors, it guarantees improved productivity, excellent stitch quality, and long-term reliability.