Lockstitch comparison
JACK JK-58450J vs JACK F6: 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.
JACK JK-58450J
Double-needle computerized lockstitch with auto cornering and a large sewing space — built-in presser-foot lifter, one-shaft drive.
JACK F6
Direct-drive computerized lockstitch machine running up to 5000 s.p.m. on a built-in silent servo motor, with oil-free semi-dry lubrication and a built-in thread-cutting knife for shirts, wovens and uniform work.
Key differences
- JACK F6 lists the higher top speed: 5000 s.p.m. against 3000 s.p.m.
- Series: JACK JK-58450J — Lockstitch, double needle; JACK F6 — Lockstitch, direct drive.
- Needle: JACK JK-58450J — DPx5, multiple gauges; JACK F6 — DBx1, 11-18#.
- Availability: JACK JK-58450J — Order on request; JACK F6 — In stock. Call to confirm today's stock.
Specifications side by side
| Specification | JACK JK-58450J | JACK F6 |
|---|---|---|
| Series | Lockstitch, double needle | Lockstitch, direct drive |
| Needle | DPx5, multiple gauges | DBx1, 11-18# |
| Max sewing speed | Up to 3000 s.p.m. | 5000 s.p.m. |
| Feature | Auto cornering, built-in presser-foot lifter | — |
| Best for | Umbrella, denim, T-shirt (chain-stitch work) | — |
| Availability | Order on request | In stock |
| Number of threads | — | 2 |
| Max stitch length | — | 5mm |
| Presser foot lift | — | Manual, knee-operated |
| Motor | — | Built-in silent, energy-saving servo motor |
| Lubrication | — | Semi-dry head, oil-free |
| Thread trimming | — | Built-in knife, manual |
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-58450J if…
Double-needle computerized lockstitch with auto cornering and a large sewing space — built-in presser-foot lifter, one-shaft drive.
- Auto cornering
- Built-in presser-foot lifter
Choose the JACK F6 if…
Direct-drive computerized lockstitch machine running up to 5000 s.p.m. on a built-in silent servo motor, with oil-free semi-dry lubrication and a built-in thread-cutting knife for shirts, wovens and uniform work.
- Built-in servo motor
- Built-in thread-cutting knife
- Oil-free semi-dry head
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-58450J and the JACK F6?
JACK F6 lists the higher top speed: 5000 s.p.m. against 3000 s.p.m. Series: JACK JK-58450J — Lockstitch, double needle; JACK F6 — Lockstitch, direct drive. Needle: JACK JK-58450J — DPx5, multiple gauges; JACK F6 — DBx1, 11-18#.
Which is better, the JACK JK-58450J or the JACK F6?
It depends on your fabric, operation and daily volume. The JACK JK-58450J is described as: Double-needle computerized lockstitch with auto cornering and a large sewing space — built-in presser-foot lifter, one-shaft drive. The JACK F6 is described as: Direct-drive computerized lockstitch machine running up to 5000 s.p.m. on a built-in silent servo motor, with oil-free semi-dry lubrication and a built-in thread-cutting knife for shirts, wovens and uniform work.
What is the price of the JACK JK-58450J and the JACK F6?
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.