Lockstitch comparison
JACK A6F-E vs JACK H7: 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 A6F-E
Digital needle-feed computerized lockstitch with a sealed oil pan and a large 300mm sewing space — feeds smoothly with no short thread tail.
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.
Key differences
- Series: JACK A6F-E — Lockstitch, needle feed; JACK H7 — Heavy-Duty, digitalized top feed.
- Best for: JACK A6F-E — Shirts, suits, pants, down jackets; JACK H7 — Sofa, car seat, luggage, gloves, bags, shoes.
- Availability: JACK A6F-E — Order on request; JACK H7 — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK A6F-E | JACK H7 |
|---|---|---|
| Series | Lockstitch, needle feed | Heavy-Duty, digitalized top feed |
| Needle | DBx1, 11-18# / DPx5, 18-21# | — |
| Max sewing speed | Up to 4000 s.p.m. | — |
| Sewing space | 300mm, large operating area | — |
| Lubrication | Sealed oil pan, no oil stains | — |
| Best for | Shirts, suits, pants, down jackets | Sofa, car seat, luggage, gloves, bags, shoes |
| Availability | Order on request | Order on request |
| Motor | — | 750W integrated motor |
| 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 |
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 A6F-E if…
Digital needle-feed computerized lockstitch with a sealed oil pan and a large 300mm sewing space — feeds smoothly with no short thread tail.
- 300mm sewing space
- Sealed, stain-free oil pan
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
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 A6F-E and the JACK H7?
Series: JACK A6F-E — Lockstitch, needle feed; JACK H7 — Heavy-Duty, digitalized top feed. Best for: JACK A6F-E — Shirts, suits, pants, down jackets; JACK H7 — Sofa, car seat, luggage, gloves, bags, shoes. Availability: JACK A6F-E — Order on request; JACK H7 — Order on request. Call to confirm today's stock.
Which is better, the JACK A6F-E or the JACK H7?
It depends on your fabric, operation and daily volume. The JACK A6F-E is described as: Digital needle-feed computerized lockstitch with a sealed oil pan and a large 300mm sewing space — feeds smoothly with no short thread tail. 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.
What is the price of the JACK A6F-E and the JACK H7?
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.