Lockstitch comparison
JACK A6F-E vs JACK S5: 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 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 S5
Computerized post-bed roller-feed machine with a built-in panel, QR-code software upgrades and a 100% stitch-overlap ratio.
Key differences
- JACK A6F-E lists the higher top speed: 4000 s.p.m. against 3000 s.p.m.
- Series: JACK A6F-E — Lockstitch, needle feed; JACK S5 — Post bed.
- Needle: JACK A6F-E — DBx1, 11-18# / DPx5, 18-21#; JACK S5 — INDPX5#16.
- Availability: JACK A6F-E — Order on request; JACK S5 — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK A6F-E | JACK S5 |
|---|---|---|
| Series | Lockstitch, needle feed | Post bed |
| Needle | DBx1, 11-18# / DPx5, 18-21# | INDPX5#16 |
| Max sewing speed | Up to 4000 s.p.m. | Up to 3000 s.p.m. |
| Sewing space | 300mm, large operating area | — |
| Lubrication | Sealed oil pan, no oil stains | — |
| Best for | Shirts, suits, pants, down jackets | Shirts, suits, pants, down jackets |
| Availability | Order on request | Order on request |
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 S5 if…
Computerized post-bed roller-feed machine with a built-in panel, QR-code software upgrades and a 100% stitch-overlap ratio.
- Post-bed design
- Runs up to 3000 s.p.m.
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 S5?
JACK A6F-E lists the higher top speed: 4000 s.p.m. against 3000 s.p.m. Series: JACK A6F-E — Lockstitch, needle feed; JACK S5 — Post bed. Needle: JACK A6F-E — DBx1, 11-18# / DPx5, 18-21#; JACK S5 — INDPX5#16.
Which is better, the JACK A6F-E or the JACK S5?
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 S5 is described as: Computerized post-bed roller-feed machine with a built-in panel, QR-code software upgrades and a 100% stitch-overlap ratio.
What is the price of the JACK A6F-E and the JACK S5?
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.