Lockstitch comparison
JACK JK-58450J 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 JK-58450J
Double-needle computerized lockstitch with auto cornering and a large sewing space — built-in presser-foot lifter, one-shaft drive.
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
- Series: JACK JK-58450J — Lockstitch, double needle; JACK Z7 — Heavy-Duty, triple transport.
- Best for: JACK JK-58450J — Umbrella, denim, T-shirt (chain-stitch work); JACK Z7 — Sofa, car seat, luggage, heavy leather goods.
- Availability: JACK JK-58450J — Order on request; JACK Z7 — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK JK-58450J | JACK Z7 |
|---|---|---|
| Series | Lockstitch, double needle | Heavy-Duty, triple transport |
| Needle | DPx5, multiple gauges | — |
| Max sewing speed | Up to 3000 s.p.m. | — |
| Feature | Auto cornering, built-in presser-foot lifter | — |
| Best for | Umbrella, denim, T-shirt (chain-stitch work) | Sofa, car seat, luggage, heavy leather goods |
| Availability | Order on request | Order on request |
| Feed | — | Needle feed + top feed + bottom feed (triple transport) |
| Controls | — | Full digital touch panel |
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 JK-58450J if…
Double-needle computerized lockstitch with auto cornering and a large sewing space — built-in presser-foot lifter, one-shaft drive.
- Auto cornering
- Built-in presser-foot lifter
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 JK-58450J and the JACK Z7?
Series: JACK JK-58450J — Lockstitch, double needle; JACK Z7 — Heavy-Duty, triple transport. Best for: JACK JK-58450J — Umbrella, denim, T-shirt (chain-stitch work); JACK Z7 — Sofa, car seat, luggage, heavy leather goods. Availability: JACK JK-58450J — Order on request; JACK Z7 — Order on request. Call to confirm today's stock.
Which is better, the JACK JK-58450J or the JACK Z7?
It depends on your fabric, operation and daily volume. The JACK JK-58450J is described as: Double-needle computerized lockstitch with auto cornering and a large sewing space — built-in presser-foot lifter, one-shaft drive. 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 JK-58450J 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.