Interlock / Coverstitch comparison
JACK JK-8787-01GX356/UT vs JACK K7: which interlock / coverstitch machine should you buy?
A side-by-side look at two interlock / coverstitch machines from our catalog: the specifications each one lists, where they differ, and which kind of production each suits. Both are used for knitwear, activewear, garments.
JACK JK-8787-01GX356/UT
Super high-speed computerized cylinder-bed interlock with an electromagnetic direct-drive presser-foot lifter group.
JACK K7
Cylinder-bed interlock machine (K7-UT-01GB) with a wider 0.6–1.8 differential ratio range than the W4, a step-motor-driven upper trimmer and holder device, and a higher top speed of 6000 s.p.m.
Key differences
- Both list the same top speed of 4500 s.p.m.
- Availability: JACK JK-8787-01GX356/UT — Order on request; JACK K7 — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK JK-8787-01GX356/UT | JACK K7 |
|---|---|---|
| Series | Interlock, cylinder-bed | — |
| Stitch/Thread | 3 stitch / 5 thread | — |
| Max sewing speed | Up to 4500 s.p.m. | — |
| Best for | Shirts, suits, pants, down jackets | — |
| Availability | Order on request | Order on request |
| Model shown | — | K7-UT-01GB |
| Needle size | — | 10# |
| No. of needles / threads | — | 3 / 5 |
| Stitch length | — | 1.5–4.5mm |
| Differential ratio | — | 0.6–1.8 |
| Preset / max speed | — | 4500 / 6000 s.p.m. |
| Features | — | Step motor, upper trim, holder device |
| Weight | — | 51–61 kg |
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-8787-01GX356/UT if…
Super high-speed computerized cylinder-bed interlock with an electromagnetic direct-drive presser-foot lifter group.
- 3-needle / 5-thread seam
- Runs up to 4500 s.p.m.
Choose the JACK K7 if…
Cylinder-bed interlock machine (K7-UT-01GB) with a wider 0.6–1.8 differential ratio range than the W4, a step-motor-driven upper trimmer and holder device, and a higher top speed of 6000 s.p.m.
- Wider differential range
- Step-motor auto trimmer
- 6000 s.p.m. top speed
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-8787-01GX356/UT and the JACK K7?
Both list the same top speed of 4500 s.p.m. Availability: JACK JK-8787-01GX356/UT — Order on request; JACK K7 — Order on request. Call to confirm today's stock.
Which is better, the JACK JK-8787-01GX356/UT or the JACK K7?
It depends on your fabric, operation and daily volume. The JACK JK-8787-01GX356/UT is described as: Super high-speed computerized cylinder-bed interlock with an electromagnetic direct-drive presser-foot lifter group. The JACK K7 is described as: Cylinder-bed interlock machine (K7-UT-01GB) with a wider 0.6–1.8 differential ratio range than the W4, a step-motor-driven upper trimmer and holder device, and a higher top speed of 6000 s.p.m.
What is the price of the JACK JK-8787-01GX356/UT and the JACK K7?
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.