Lockstitch comparison
JACK A3C vs JACK Z7: which lockstitch machine should you buy?
A side-by-side look at two lockstitch machines from our catalog: the specifications each one lists, where they differ, and which kind of production each suits.
JACK A3C
Computerized single-needle lockstitch machine with auto thread trimmer, from Jack’s A-series — a step up from the A2C with Jack’s newer intelligent control system.
JACK Z7
Heavy-duty computerized lockstitch machine with triple transport — needle feed plus top and bottom feed together — controlled from a full digital touch panel, for sofas, car seats, luggage and heavy leather goods.
Key differences
- JACK A3C lists an automatic thread trimmer; JACK Z7 does not list one.
- Series: JACK A3C — Lockstitch (A-series); JACK Z7 — Heavy-Duty, triple transport.
- Controls: JACK A3C — Intelligent operation panel, one-key reset; JACK Z7 — Full digital touch panel.
- Feed: JACK A3C — Computerized, auto-trimmer, auto backtack, auto foot lift; JACK Z7 — Needle feed + top feed + bottom feed (triple transport).
- Best for: JACK A3C — General garment stitching, production lines; JACK Z7 — Sofa, car seat, luggage, heavy leather goods.
- Availability: JACK A3C — Order on request; JACK Z7 — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK A3C | JACK Z7 |
|---|---|---|
| Series | Lockstitch (A-series) | Heavy-Duty, triple transport |
| Needle | DBx1, 11-18# | — |
| Number of threads | 2 | — |
| Max stitch length | 5mm | — |
| Presser foot lift (hand/auto) | 13mm / 6mm | — |
| Max sewing speed | 5000 s.p.m. | — |
| Motor | Direct-drive integrated servo motor | — |
| Controls | Intelligent operation panel, one-key reset | Full digital touch panel |
| Feed | Computerized, auto-trimmer, auto backtack, auto foot lift | Needle feed + top feed + bottom feed (triple transport) |
| Best for | General garment stitching, production lines | Sofa, car seat, luggage, heavy leather goods |
| Availability | Order on request | Order on request |
Highlighted rows differ. A dash means the catalog does not list that specification for the machine; ask us and we will confirm it.
Which one fits your work?
Choose the JACK A3C if…
Computerized single-needle lockstitch machine with auto thread trimmer, from Jack’s A-series — a step up from the A2C with Jack’s newer intelligent control system.
- One-key reset panel
- Auto trim, backtack & foot lift
Choose the JACK Z7 if…
Heavy-duty computerized lockstitch machine with triple transport — needle feed plus top and bottom feed together — controlled from a full digital touch panel, for sofas, car seats, luggage and heavy leather goods.
- Triple transport feed
- Full digital touch panel
Swami Enterprises is an authorized JACK dealer and importer. Bring your own fabric to the Chanakya Place showroom and sew on both before you decide.
Questions buyers ask
What is the difference between the JACK A3C and the JACK Z7?
JACK A3C lists an automatic thread trimmer; JACK Z7 does not list one. Series: JACK A3C — Lockstitch (A-series); JACK Z7 — Heavy-Duty, triple transport. Controls: JACK A3C — Intelligent operation panel, one-key reset; JACK Z7 — Full digital touch panel.
Which is better, the JACK A3C or the JACK Z7?
It depends on your fabric, operation and daily volume. The JACK A3C is described as: Computerized single-needle lockstitch machine with auto thread trimmer, from Jack’s A-series — a step up from the A2C with Jack’s newer intelligent control system. The JACK Z7 is described as: Heavy-duty computerized lockstitch machine with triple transport — needle feed plus top and bottom feed together — controlled from a full digital touch panel, for sofas, car seats, luggage and heavy leather goods.
What is the price of the JACK A3C and the JACK Z7?
Prices depend on the model, quantity and the day. Call +91 99713 36656 or request a quote for today's price on either machine.
Can I see both machines before buying?
Yes. Visit the showroom at Chanakya Place, New Delhi. Call +91 99713 36656 first so the team can confirm which models are on display and in stock.
Not sure which to pick?
Tell us your fabric, operation and daily volume. A specialist will recommend one, with today's price.