Interlock / Coverstitch comparison
JACK W4 vs JACK W5E-UT: 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 W4
Cylinder-bed interlock machine (W4-D-01GB) with a 3-needle/5-thread setup, a 0.65–1.3 differential ratio for gathering or stretching seams, and a max speed of 5500 s.p.m.
JACK W5E-UT
Jack’s current computerized flat-bed interlock with an automatic thread trimmer — a step up from the older W4, built for elastic attaching, tape and waistband work.
Key differences
- Both list the same top speed of 5500 s.p.m.
- JACK W5E-UT lists an automatic thread trimmer; JACK W4 does not list one.
- Availability: JACK W4 — Order on request; JACK W5E-UT — Order on request. Call to confirm today's stock.
Specifications side by side
| Specification | JACK W4 | JACK W5E-UT |
|---|---|---|
| Model shown | W4-D-01GB | — |
| Needle | UY128GAS, 11-14# | — |
| Needle no. / thread no. | 3 / 5 | — |
| Stitch length | 1.5–4.5mm | — |
| Stitch width | 5.6 / 6.4mm | — |
| Differential ratio | 0.65–1.3 | — |
| Max speed | 5500 s.p.m. | — |
| Weight | 48–64 kg (model-dependent) | — |
| Availability | Order on request | Order on request |
| Series | — | Interlock (flat-bed), computerized |
| Max sewing speed | — | Up to 5500 s.p.m. |
| Feed | — | Full-automatic, auto thread trimmer |
| Controls | — | Digital speed display, one-key reset |
| Best for | — | T-shirts, underwear, jeans, mid-to-high-level clothing |
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 W4 if…
Cylinder-bed interlock machine (W4-D-01GB) with a 3-needle/5-thread setup, a 0.65–1.3 differential ratio for gathering or stretching seams, and a max speed of 5500 s.p.m.
- 0.65-1.3 differential feed
- 3-needle / 5-thread seam
- Runs up to 5500 s.p.m.
Choose the JACK W5E-UT if…
Jack’s current computerized flat-bed interlock with an automatic thread trimmer — a step up from the older W4, built for elastic attaching, tape and waistband work.
- Full-automatic auto trimmer
- One-key reset, digital display
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 W4 and the JACK W5E-UT?
Both list the same top speed of 5500 s.p.m. JACK W5E-UT lists an automatic thread trimmer; JACK W4 does not list one. Availability: JACK W4 — Order on request; JACK W5E-UT — Order on request. Call to confirm today's stock.
Which is better, the JACK W4 or the JACK W5E-UT?
It depends on your fabric, operation and daily volume. The JACK W4 is described as: Cylinder-bed interlock machine (W4-D-01GB) with a 3-needle/5-thread setup, a 0.65–1.3 differential ratio for gathering or stretching seams, and a max speed of 5500 s.p.m. The JACK W5E-UT is described as: Jack’s current computerized flat-bed interlock with an automatic thread trimmer — a step up from the older W4, built for elastic attaching, tape and waistband work.
What is the price of the JACK W4 and the JACK W5E-UT?
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.