Lockstitch comparison
JACK A3C vs MAQI LS640E: 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. Both are used for wovens, garments.

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.

MAQI LS640E
MAQI's LS640E is an electronic top-and-bottom-feed lockstitch machine with an oversized sewing space and a stepper-motor-driven presser foot for a lighter, adjustable lift.
Key differences
- JACK A3C lists an automatic thread trimmer; MAQI LS640E does not list one.
- Series: JACK A3C — Lockstitch (A-series); MAQI LS640E — Lockstitch, electronic top-and-bottom feed.
- Availability: JACK A3C — Order on request; MAQI LS640E — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK A3C | MAQI LS640E |
|---|---|---|
| Series | Lockstitch (A-series) | Lockstitch, electronic top-and-bottom feed |
| 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 | — |
| Feed | Computerized, auto-trimmer, auto backtack, auto foot lift | — |
| Best for | General garment stitching, production lines | — |
| Availability | Order on request | Order on request |
| Sewing space | — | Oversized ("super huge") |
| Presser foot | — | Stepper-motor driven, adjustable lift |
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 MAQI LS640E if…
MAQI's LS640E is an electronic top-and-bottom-feed lockstitch machine with an oversized sewing space and a stepper-motor-driven presser foot for a lighter, adjustable lift.
- Oversized sewing space
- Stepper-motor presser foot
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 A3C and the MAQI LS640E?
JACK A3C lists an automatic thread trimmer; MAQI LS640E does not list one. Series: JACK A3C — Lockstitch (A-series); MAQI LS640E — Lockstitch, electronic top-and-bottom feed. Availability: JACK A3C — Order on request; MAQI LS640E — Order on request. Call to confirm today's stock.
Which is better, the JACK A3C or the MAQI LS640E?
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 MAQI LS640E is described as: MAQI's LS640E is an electronic top-and-bottom-feed lockstitch machine with an oversized sewing space and a stepper-motor-driven presser foot for a lighter, adjustable lift.
What is the price of the JACK A3C and the MAQI LS640E?
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.