Lockstitch comparison
JACK S7 vs SINGER SS 9900: 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 S7
Jack’s current digitalized post-bed machine — three independent stepper motors and a 5-inch touch screen for accurate, noiseless roller-feed sewing.
SINGER SS 9900
A direct-drive single-needle lockstitch machine with an energy-saving built-in motor, fully automatic lubrication and a quick-response integrated control system in the head.
Key differences
- The catalog lists different roles for the two: compare the "best for" notes below and tell us your fabric and volume.
Specifications side by side
| Specification | JACK S7 | SINGER SS 9900 |
|---|---|---|
| Series | Post bed, digitalized | — |
| Motors | 3 stepper motors (needle bar + two rollers) plus main shaft motor | — |
| Screen | 5-inch multilanguage touch screen | — |
| Thread trimmer | Short-thread cut to 3mm precision | — |
| Perforation capacity | Penetrates 110+ layers of A4 paper | — |
| Connectivity | Industry 4.0 WiFi module (optional) | — |
| Best for | Shirts, jeans, non-woven bags, shoes, bags | — |
| Availability | Order on request | — |
| Motor | — | Energy-saving direct drive, Qixing motor & control box |
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 S7 if…
Jack’s current digitalized post-bed machine — three independent stepper motors and a 5-inch touch screen for accurate, noiseless roller-feed sewing.
- 3 stepper motors + main shaft
- 3mm-precision thread trim
- 110+ layer perforation capacity
Choose the SINGER SS 9900 if…
A direct-drive single-needle lockstitch machine with an energy-saving built-in motor, fully automatic lubrication and a quick-response integrated control system in the head.
Swami Enterprises is an authorized JACK dealer and importer. Swami Enterprises stocks SINGER 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 S7 and the SINGER SS 9900?
The catalog lists different roles for the two: compare the "best for" notes below and tell us your fabric and volume.
Which is better, the JACK S7 or the SINGER SS 9900?
It depends on your fabric, operation and daily volume. The JACK S7 is described as: Jack’s current digitalized post-bed machine — three independent stepper motors and a 5-inch touch screen for accurate, noiseless roller-feed sewing. The SINGER SS 9900 is described as: A direct-drive single-needle lockstitch machine with an energy-saving built-in motor, fully automatic lubrication and a quick-response integrated control system in the head.
What is the price of the JACK S7 and the SINGER SS 9900?
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.