Lockstitch comparison
JACK H7 vs SINGER SS 9900 T: 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 H7
Jack’s current top-feed heavy-duty lockstitch, replacing the older H5/H6 — pierces 10+ layers of leather with a fully digital, 16-level presser foot lift.
SINGER SS 9900 T
SINGER's SS 9900 T is the SS 9900 fitted with an auto thread trimmer and single-shaft mechanism, for single-needle lockstitch work with faster changeovers between pieces.
Key differences
- SINGER SS 9900 T lists an automatic thread trimmer; JACK H7 does not list one.
- Motor: JACK H7 — 750W integrated motor; SINGER SS 9900 T — Qixing motor & control box.
Specifications side by side
| Specification | JACK H7 | SINGER SS 9900 T |
|---|---|---|
| Series | Heavy-Duty, digitalized top feed | — |
| Motor | 750W integrated motor | Qixing motor & control box |
| Presser foot lift | 16 adjustable levels, stepper-motor controlled | — |
| Stitch length | 1.3mm – 5.5mm, graduated adjustment | — |
| Material capability | Pierces 10+ layers of leather; handles 8 layers cleanly | — |
| Controls | Digital knee lifter with micro-lift, double-row LED lights | — |
| Best for | Sofa, car seat, luggage, gloves, bags, shoes | — |
| Availability | Order on request | — |
| Thread trimming | — | Automatic |
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 H7 if…
Jack’s current top-feed heavy-duty lockstitch, replacing the older H5/H6 — pierces 10+ layers of leather with a fully digital, 16-level presser foot lift.
- 16-level stepper foot lift
- Pierces 10+ leather layers
- 1.3-5.5mm stitch range
Choose the SINGER SS 9900 T if…
SINGER's SS 9900 T is the SS 9900 fitted with an auto thread trimmer and single-shaft mechanism, for single-needle lockstitch work with faster changeovers between pieces.
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 H7 and the SINGER SS 9900 T?
SINGER SS 9900 T lists an automatic thread trimmer; JACK H7 does not list one. Motor: JACK H7 — 750W integrated motor; SINGER SS 9900 T — Qixing motor & control box.
Which is better, the JACK H7 or the SINGER SS 9900 T?
It depends on your fabric, operation and daily volume. The JACK H7 is described as: Jack’s current top-feed heavy-duty lockstitch, replacing the older H5/H6 — pierces 10+ layers of leather with a fully digital, 16-level presser foot lift. The SINGER SS 9900 T is described as: SINGER's SS 9900 T is the SS 9900 fitted with an auto thread trimmer and single-shaft mechanism, for single-needle lockstitch work with faster changeovers between pieces.
What is the price of the JACK H7 and the SINGER SS 9900 T?
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.