Lockstitch comparison
JACK Z7 vs MAQI LS3820DP: 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 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.

MAQI LS3820DP
MAQI lists the LS3820DP under its Lockstitch series, but its own product page names it a "direct drive chain stitch sewing machine" with a curved-needle construction and a puller/feed panel — closer to a chainstitch/blind-stitch head than a standard lockstitch. Confirm the exact stitch type with a specialist before ordering.
Key differences
- Series: JACK Z7 — Heavy-Duty, triple transport; MAQI LS3820DP — Listed as Lockstitch by MAQI; product page names it a chain stitch machine.
- Feed: JACK Z7 — Needle feed + top feed + bottom feed (triple transport); MAQI LS3820DP — Linkage part, puller/feed panel.
- Availability: JACK Z7 — Order on request; MAQI LS3820DP — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK Z7 | MAQI LS3820DP |
|---|---|---|
| Series | Heavy-Duty, triple transport | Listed as Lockstitch by MAQI; product page names it a chain stitch machine |
| Feed | Needle feed + top feed + bottom feed (triple transport) | Linkage part, puller/feed panel |
| Controls | Full digital touch panel | — |
| Best for | Sofa, car seat, luggage, heavy leather goods | — |
| Availability | Order on request | Order on request |
| Needle | — | Curved-needle construction |
| Speed/oil | — | Low speed, oil-supplied head |
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 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
Choose the MAQI LS3820DP if…
MAQI lists the LS3820DP under its Lockstitch series, but its own product page names it a "direct drive chain stitch sewing machine" with a curved-needle construction and a puller/feed panel — closer to a chainstitch/blind-stitch head than a standard lockstitch. Confirm the exact stitch type with a specialist before ordering.
- Curved-needle construction
- Puller feed panel
Swami Enterprises is an authorized JACK dealer and importer. Swami Enterprises stocks MAQI machines as a stocking partner. 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 Z7 and the MAQI LS3820DP?
Series: JACK Z7 — Heavy-Duty, triple transport; MAQI LS3820DP — Listed as Lockstitch by MAQI; product page names it a chain stitch machine. Feed: JACK Z7 — Needle feed + top feed + bottom feed (triple transport); MAQI LS3820DP — Linkage part, puller/feed panel. Availability: JACK Z7 — Order on request; MAQI LS3820DP — Order on request. Call to confirm today's stock.
Which is better, the JACK Z7 or the MAQI LS3820DP?
It depends on your fabric, operation and daily volume. 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. The MAQI LS3820DP is described as: MAQI lists the LS3820DP under its Lockstitch series, but its own product page names it a "direct drive chain stitch sewing machine" with a curved-needle construction and a puller/feed panel — closer to a chainstitch/blind-stitch head than a standard lockstitch. Confirm the exact stitch type with a specialist before ordering.
What is the price of the JACK Z7 and the MAQI LS3820DP?
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.