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JACK® JK-797DI overlock industrial sewing machine

JACK · Overlock

JACK® JK‑797DI

JACK® JK-797DI – 4-Thread Small Cylinder Overlock Machine – Complete Setup, Fully Submerged Table Included

The JACK® JK-797DI is a 4-thread small cylinder-bed overlock machine purpose-built for neck binding, collar attachment, cuff finishing, and any tubular or closed-seam overlock work.

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Pricing, configuration, and ordering on the Shopify store.

Performance

Stitch Type
4-Thread Overlock

Capacity

Needle System
DCx27 / B27, sizes #9–#16

Automation

Drive Type
Direct Drive
Tension System
FR02 Mechanical Tension

Physical

Motor
550W Direct-Drive Servo Motor
Machine Type
4-Thread Small Cylinder-Bed Overlock / Serger
Construction
Small Cylinder Bed
Configuration
514 — 5mm Stitch Width, 4-Thread
Differential Feed
M03/333 — 3×3 Ratio
Table Setup
Fully Submerged (Cylinder Arm at Table Level)

Manufactured by

Jack. 30+ years of industrial sewing.

Why Jack →

Detail

How it runs on the floor

The JACK® JK-797DI is a 4-thread small cylinder-bed overlock machine purpose-built for neck binding, collar attachment, cuff finishing, and any tubular or closed-seam overlock work. Its compact cylinder arm fits inside pre-assembled pieces like T-shirt necks, sleeves, and leg openings that flatbed machines cannot handle. This complete industrial setup includes the machine head, 550W direct-drive servo motor, and fully submerged table — ready to run out of the box.

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What's Included

  • JACK® JK-797DI-4-514 Machine (ships assembled)
  • Fully Submerged Industrial Table Setup, Assembled
  • 550W Direct-Drive Servo Motor, Mounted & Wired
  • Foot Pedal & Power Cable
  • M03/333 Differential Feed Module
  • FR02 Mechanical Tension System
  • Standard Presser Foot Set, Needles & Basic Accessory Kit

Key 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
  • 550W integrated direct-drive servo motor — no belt, fast response, low vibration, quiet operation
  • FR02 mechanical tension system — reliable, easy-to-set mechanical tension for consistent stitch quality
  • M03/333 3×3 differential feed module — handles knit and stretch fabrics without distortion
  • 5mm stitch width (514 configuration) optimized for industrial knitwear finishing
  • Fully submerged table setup — cylinder arm sits at table level for comfortable feeding of pre-assembled pieces

Ideal For

  • T-shirt and knitwear factories: neck binding, collar, and cuff overlocking
  • Garment sewers working with tubular or closed pre-assembled pieces
  • Industrial production requiring compact cylinder-arm serger performance
  • Operators finishing sleeves, leg openings, and cuffs on knit fabrics

Questions

Before you buy

Quick answers to the questions buyers ask most about Jack industrial machines. For pricing, configuration, and live availability, the Shopify product page is always the source of truth.

How do I get current pricing for this Jack model?

Pricing and live availability are handled on the Shopify store. Tap 'View on Shopify' above to see the current price, configuration options, and delivery estimates for your zip code.

Does the machine ship as a complete setup?

Most Jack industrial models ship as complete production setups: head, servo motor, table, and stand. The product description above lists exactly what's included for this specific model.

What kind of warranty does Jack provide?

Every Jack machine carries a manufacturer warranty against defects in materials and workmanship. Authorized US dealers also provide local service and parts support. See the Shopify product page for the warranty terms specific to this model.

Are genuine Jack replacement parts available?

Yes. Original Jack feed dogs, hooks, gauge sets, presser feet, and electronics are stocked and traceable to the manufacturer. The Service & Parts page lists parts categories; the Shopify store carries the active SKUs.

Where is service available in the United States?

Authorized service technicians work nationwide through Jack's US dealer network. The Service & Parts page explains how coverage works, and each model's Shopify listing routes you to the dealer closest to your production floor.

Other Overlock machines

JACK® JK‑797DI

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