About SIRUBA 747 -FS MINI CYLINDER OVERLOCK MACHINE
The SiRUBA 747 Cylinder Bed series (commonly designated under the 747KS or 747KST model lines) is a high-speed, industrial 4-thread overlock (serger) machine. It is specifically engineered with a small, circular sewing arm instead of a traditional flatbed. This design is purpose-built for sewing and edge-finishing small, tubular, or closed-loop garment sections.Â
Detailed breakdowns of this machine's key features, applications, and technical specifications are outlined below. [
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Key Features
- Mini Cylinder Bed Architecture: Features a narrow 148mm circumference bed. This allows small tubular pieces to slide smoothly over the arm without stretching or bunching. [1, 2, 3, 4, 5]
- Direct-Drive Servo Motor: Most modern iterations come standard with an energy-efficient servo motor integrated directly onto the machine head. This setup reduces energy consumption by up to 75% compared to old clutch motors while minimizing noise and vibration.Â
- Advanced Fabric Feeding: Equipped with an adjustable differential feed (ranging from 0.7 to 2.0). This prevents puckering on delicate fabrics and controls stretching on high-elastic materials.Â
- Automatic Lubrication: A fully automatic, centralized oiling system ensures all internal moving components stay continuously lubricated for prolonged durability during high-volume production shifts.Â
Core Technical Specifications
| Specification |
Target Details |
| Stitch Formation |
2-Needle, 4-Thread Overlock (Style 514) |
| Max Sewing Speed |
Up to 5,000 to 6,500 Stitches Per Minute (SPM) depending on sub-model |
| Cylinder Circumference |
148 mm |
| Max Stitch Length |
Adjustable up to 3.8 mm 4 mm |
| Overedge Stitch Width |
Standard 4 mm (total seam width up to 6 mm) |
| Needle System |
DC27 (or B27) |
| Presser Foot Lift |
Up to 5 mm |
Primary Applications
The cylindrical arm makes this machine the industry standard for overedging circular items where flatbed machines cannot easily maneuver.
- Attaching ribbed collars, necks, and cuffs on knitwear and T-shirts.
- Seaming waistbands on leggings, underwear, activewear, and swimwear.
- Hemming and closing pant legs, sleeve openings, and children's clothing.Â
If you are looking to purchase or configure this machine, let me know:
- What specific garments or materials (e.g., highly elastic swimwear, heavy fleece) you plan to sew?
- Do you require integrated pneumatic attachments like an automatic thread trimmer (VT) or an auto-foot lifter?
- Are you looking for pricing and supplier availability in your region.