Jack Catalogue and specifications

Jack JK-797 catalogue (PDF)

Jack's catalogue for the JK-797Di, a high-speed overlock machine with a small cylinder bed. The 148 mm bed fits inside T-shirt necklines, cuffs and other small tubes, so uniform, sportswear and children's wear lines overlock openings a flat-bed machine cannot reach.

Download the catalogue (PDF, 4.7 MB) Jack JK-797: photos and quote

2 pages, Jack Technology Co., Ltd. catalogue, Al Borj edition, October 2026. Free to download, with our contact details on the first and last page. For the AED price, delivery and installation, ask us on WhatsApp; we reply within one working day.

Jack JK-797 catalogue, page 2: front and back cover, the JK-797Di high speed small cylinder-bed overlock machine

What the Jack JK-797 catalogue covers

Two pages in English: the cover with the machine, then the materials it suits, the features and the technical parameter table for the 3-thread and 4-thread builds. Jack shows T-shirts, round necklines, children's clothing cuffs and socks as the uses.

JK-797Di is the current name of the JK-797. Al Borj supplies, installs and services it from Sharjah and Accra, in the UAE, the GCC and Africa.

Machine type: Small cylinder-bed overlock machine.

Max speed
5,500 stitches per minute
Cylinder bed circumference
148 mm
Stitch width
3 mm (3-thread) or 5-7 mm (4-thread)
Stitch length
3.8 mm
Differential ratio
0.8-1.8
Thread count
3 or 4, depending on configuration

Figures from the Jack catalogue.

Pages from the Jack JK-797 catalogue

Jack JK-797 catalogue, page 2: front and back cover, the JK-797Di high speed small cylinder-bed overlock machine
Page 2
Jack JK-797 catalogue, page 3: applications, features and technical parameters
Page 3

Download the Jack JK-797 catalogue (PDF, 4.7 MB)

The machine

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