JACK · Overlock

JACK® JK‑797DI

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

$3,985

In stock

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.

Free shipping to most US states
Financing — Affirm & Synchrony
Manufacturer warranty
Genuine parts & US service

Buy now

Add to cart, then check out securely. Financing (Affirm & Synchrony) applied at checkout.

Questions?Chat on WhatsApp Call +1 (954) 681-3894

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.

350+ genuine parts in stock (USA) · authorized US service · manufacturer warranty included.

More Overlock →

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.

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?

The price is shown above on this page. Add the machine to your cart and check out securely — the current price, configuration options, financing (Affirm & Synchrony), and delivery estimates are confirmed at checkout.

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.