Jack 797DI High Speed 4 Thread Small Cylinder-Bed Overlock Machine with Complete Fully Assembled Tabling Included

This specialized 4-thread overlock machine features a small cylinder-bed design that excels at sewing inside tubular and pre-assembled garment pieces where traditional flatbed machines cannot reach. The compact cylinder arm easily fits inside T-shirt necks, sleeve cuffs, collar openings, and leg openings, making it an ideal choice for neck binding, collar attachment, and cuff finishing operations. Built with mechanical tension control and differential feed capabilities, it handles stretch and knit fabrics with precision while preventing puckering or seam distortion. The machine delivers strong, clean seams and edge finishing in a single pass, making it particularly valuable for garment manufacturers working with knitwear and tubular construction techniques.

MACHINE APPLICATIONS:

• 4-thread overlock configuration for strong, stretchy seams on knit fabrics
• Small cylinder bed for collars, cuffs, leg openings and tubular operations
• FR02 mechanical tension device for stable thread control, ideal for neck binding
• Differential feed to control stretch or gathering on tricky knits and ribs
• High-speed industrial performance for continuous production
• Fully submerged table setup – machine head sits below flush, improving handling of garments around the cylinder
• Assembled with industrial table, stand and servo motor (typical configuration) for smooth, quiet, energy-efficient operation

MACHINE FEATURES:

• 4-thread overlock stitch on a small cylinder-bed arm — sew inside tubular, closed and pre-assembled pieces
• Neck binding specialist: fits inside T-shirt necks, collar openings, sleeve cuffs and leg openings
• Integrated direct-drive servo motor (DI) — no belt, fast response, low vibration, quiet operation
• FR02 mechanical tension system — reliable, easy-to-set mechanical tension for consistent stitch quality
• M03/333 differential feed (3×3 ratio) — handles stretch and knit fabrics without puckering or stretching seams
• 514 configuration — 5mm stitch width, 4-thread overlock for strong, clean seam and edge finish in one pass
• Fully submerged table setup — cylinder arm level with table surface for smooth, supported material handling
• High-speed production capability for T-shirt, knitwear and activewear manufacturing

MACHINE SPECIFICATIONS:

• Machine Type: 4-Thread Small Cylinder-Bed Overlock / Serger
• Stitch Type: 4-Thread Overlock
• Construction: Small Cylinder Bed
• Configuration: 514 — 5mm (0.20") Stitch Width, 4-Thread
• Differential Feed: M03/333 — 3×3 Ratio
• Tension System: FR02 Mechanical Tension
• Motor: Integrated Direct-Drive Servo (DI)
• Table Setup: Fully Submerged (Cylinder Arm at Table Level)
• Primary Use: Neck Binding, Collar, Cuff & Closed-Seam Overlocking on Knitwear

THE ADVANTAGES OF A DIRECT DRIVE MOTOR:

• Motor is built directly into the machine head for maximum efficiency
• Silent operation with low vibration
• Energy efficient — uses up to 70% less power than clutch motors
• Precise speed control through electronic foot pedal
• Instant start/stop with electronic braking
• Compact design eliminates belt and pulley maintenance