Lockstitch comparison
JACK JK-2030G 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.
JACK JK-2030G
Full-automatic top-and-bottom feeding computerized lockstitch for heavy duty, with a large working space for 8-layer leather work.
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
- JACK A4C lists the higher top speed: 5000 s.p.m. against 2200 s.p.m.
- JACK A4C lists an automatic thread trimmer; JACK JK-2030G does not list one.
- Series: JACK JK-2030G — Heavy-Duty, top & bottom feed; JACK A4C — Lockstitch (A-series, AI-integrated).
- Needle: JACK JK-2030G — DPx17, 20-23#; JACK A4C — DBx1, 11-18#.
- Availability: JACK JK-2030G — Order on request; JACK A4C — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK JK-2030G | JACK A4C |
|---|---|---|
| Series | Heavy-Duty, top & bottom feed | Lockstitch (A-series, AI-integrated) |
| Needle | DPx17, 20-23# | DBx1, 11-18# |
| Max sewing speed | Up to 2200 s.p.m. | 5000 s.p.m. |
| Best for | Sofa, car seat, luggage, shoes | — |
| Availability | Order on request | Order on request |
| Number of threads | — | 2 |
| Max stitch length | — | 5mm |
| Presser foot lift (hand/auto) | — | 13mm / 6mm |
| Control system | — | Jack NTB system with Octopus "Nine-Brain" AI chip |
| Motor | — | Direct-drive integrated servo motor |
| Feed | — | Computerized, auto-trimmer, auto backtack, auto foot 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 JK-2030G if…
Full-automatic top-and-bottom feeding computerized lockstitch for heavy duty, with a large working space for 8-layer leather work.
- Top & bottom auto feed
- Large working space
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 JK-2030G and the JACK A4C?
JACK A4C lists the higher top speed: 5000 s.p.m. against 2200 s.p.m. JACK A4C lists an automatic thread trimmer; JACK JK-2030G does not list one. Series: JACK JK-2030G — Heavy-Duty, top & bottom feed; JACK A4C — Lockstitch (A-series, AI-integrated).
Which is better, the JACK JK-2030G or the JACK A4C?
It depends on your fabric, operation and daily volume. The JACK JK-2030G is described as: Full-automatic top-and-bottom feeding computerized lockstitch for heavy duty, with a large working space for 8-layer leather work. 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 JK-2030G 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.