How Do You Choose The Hook Of Industrial Flat Bed Sewing Machine?

As the two core loop forming devices of industrial flat bed sewing machines, the rotary hook and shuttle hooks directly affect sewing efficiency, stitch quality and the scope of application of the machine. Most customers will have confusion when purchasing flat bag sewing machine, the rotary hook better or the shuttle hook better? Today, you will have a clearer understanding of these two types hooks through this article.

1. Structural and design differences

● Rotary Hook

The rotary shuttle consists of bobbin, bobbin case and precision gears, which are internally supported by bearings or bushings to complete the formation of thread loops in a circular motion. Its core parts are made of high-strength alloy steel or titanium-plated process to ensure wear resistance under high-speed operation.

The rotary hook the machine needle thread loop in 360°continuous rotation through the synchronized rotation of the main shaft (usually forming a 1:1 or 2:1 transmission ratio with the needle movement) to form a double thread lock stitch (such as the 301 stitch in the ISO 4915 standard).

● Shuttle Hook

The shuttle hook consists of curved pendulum arm, shuttle bed and pendulum shaft, and realizes reciprocating pendulum through crank linkage mechanism. Its structure is relatively simple, the parts are mostly made of cast iron or carbon steel, focusing on impact resistance rather than precision fit.

The bobbin oscillates in a sector-shaped trajectory of 180°-220°, hooking the thread loop when the needle rises and then resetting in the reverse direction. Due to the discontinuous trajectory, it is dependent on mechanical gap adjustment to accommodate different thread tensions.

2. Applicable industry

(1) Core application areas for rotary hooks

• Garment Manufacturing:
• High-speed rotary hooks can match sewing speeds up to 6,000 stitches per minute, and are suitable for assembly line production of lightweight fabrics such as shirts and suits.
• Home textile and lingerie industry:
• For jacquard fabrics and lace, which require a high degree of stitch flatness, the rotary shuttle avoids skipped stitches by means of precise thread loop synchronization technology.
• Automation integration scenarios:
• Rotary shuttle sewing machines with servo motors can be programmed to realize complex stitches and are suitable for high-precision scenarios such as automotive airbag sewing.

In KINGMAX, the following rotary hook flat bed sewing machines are available,

1.Two Needle Triple Feed and Walking Foot Lockstitch Sewing Machine 867 Series

2.Single Needle Compound Feed and Walking Foot Lockstitch Sewing Machine 867 Series

3.Direct-driven 1-needle Compound Feed and Walking Foot Lockstitch Sewing Machine 1541S Series

4.1-needle 18 Inch Long Arm Triple Feed and Walking Foot Leather Sewing Machine

5.1-needle 30 Inch Long Arm Compound Feed and Walking Foot Lockstitch Sewing Machine

(2) Core application areas for shuttle hooks

• Leather and bag making:
• The strong thrust design of the pendulum shuttle can penetrate 3mm thick cowhide and has better compatibility with thick threads (e.g. nylon thread). For example, luxury brands such as LV commonly use the pendulum shuttle for their leather stitching process.
• Outdoor equipment and industrial canvas:
• When handling heavy materials such as tents and canvas, the swinging inertia of the pendulum shuttle helps to overcome the resistance of the fabric and avoid needle breakage.
• Low-cost maintenance workshop:
• The simple structure of the pendulum shuttle requires only regular lubrication for maintenance, making it suitable for maintenance environments in Africa and Southeast Asia, where there is a lack of specialized technicians.

In KINGMAX, the following shuttle hook flat bed sewing machines are available,

1.Extra Heavy Duty Compound Feed and Walking Foot Industrial Sewing Machine 204-370

2.Single Needle Long Arm Sewing Machine GA204-762

3.30 Inch Long Arm Extra Heavy Duty Top and Bottom Feed Sewing Machine

3. Conclusion

The essential difference between rotary hook and shuttle hook from the physical limitations of the kinematic principle, rather than a simple distinction between "advanced" and "backward". In the garment lightweight and industrial material heavy parallel, the two will be in their respective advantages in the field of long-term coexistence. It is recommended that enterprises based on product positioning, material characteristics and total cost of ownership (TCO) comprehensive assessment, if necessary, can be used to rotary shuttle + swing shuttle dual-line equipment configuration to maximize production flexibility.