Lockstitch comparison
JACK A3C vs JACK A4C: 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 shirts, 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.
JACK A4C
AI-integrated lockstitch machine running the Jack NTB control system with the Octopus "Nine-Brain" chip — direct-drive servo motor, auto thread trimmer, auto backtack and auto foot lift at up to 5000 s.p.m.
Key differences
- Both list the same top speed of 5000 s.p.m.
- Availability: JACK A3C — Order on request; JACK A4C — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK A3C | JACK A4C |
|---|---|---|
| Series | Lockstitch (A-series) | Lockstitch (A-series, AI-integrated) |
| Needle | DBx1, 11-18# | DBx1, 11-18# |
| Number of threads | 2 | 2 |
| Max stitch length | 5mm | 5mm |
| Presser foot lift (hand/auto) | 13mm / 6mm | 13mm / 6mm |
| Max sewing speed | 5000 s.p.m. | 5000 s.p.m. |
| Motor | Direct-drive integrated servo motor | Direct-drive integrated servo motor |
| Controls | Intelligent operation panel, one-key reset | — |
| Feed | Computerized, auto-trimmer, auto backtack, auto foot lift | Computerized, auto-trimmer, auto backtack, auto foot lift |
| Best for | General garment stitching, production lines | — |
| Availability | Order on request | Order on request |
| Control system | — | Jack NTB system with Octopus "Nine-Brain" AI chip |
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 A4C if…
AI-integrated lockstitch machine running the Jack NTB control system with the Octopus "Nine-Brain" chip — direct-drive servo motor, auto thread trimmer, auto backtack and auto foot lift at up to 5000 s.p.m.
- AI Nine-Brain chip
- Auto trim, backtack & foot lift
- Direct-drive servo motor
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 A4C?
Both list the same top speed of 5000 s.p.m. Availability: JACK A3C — Order on request; JACK A4C — Order on request. Call to confirm today's stock.
Which is better, the JACK A3C or the JACK A4C?
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 A4C is described as: AI-integrated lockstitch machine running the Jack NTB control system with the Octopus "Nine-Brain" chip — direct-drive servo motor, auto thread trimmer, auto backtack and auto foot lift at up to 5000 s.p.m.
What is the price of the JACK A3C and the JACK A4C?
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.