Overlock comparison
JACK JK-797 vs SINGER S 8140: which overlock machine should you buy?
A side-by-side look at two overlock machines from our catalog: the specifications each one lists, where they differ, and which kind of production each suits. Both are used for knitwear, wovens, garments.
JACK JK-797
Small cylinder-bed, super-fast overlock with variable top feed — a compact bed for flexible, no-dislocation sewing on curved seams.
SINGER S 8140
SINGER's S 8140 is a direct-drive four-thread overlock machine built for up to 70% lower power consumption, with automatic lubrication (with oil filter), needle position control and easily adjustable differential feed.
Key differences
- The catalog lists different roles for the two: compare the "best for" notes below and tell us your fabric and volume.
Specifications side by side
| Specification | JACK JK-797 | SINGER S 8140 |
|---|---|---|
| Series | Overlock, small-arm | — |
| Needle | DCx27, 9#–11# | — |
| Max sewing speed | Up to 7000 s.p.m. | — |
| Best for | T-shirts, underwear, jeans, mid-to-high-level clothing | — |
| Availability | Order on request | — |
| Threads | — | 4-thread overlock |
| Motor | — | Direct drive, up to 70% power saving |
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-797 if…
Small cylinder-bed, super-fast overlock with variable top feed — a compact bed for flexible, no-dislocation sewing on curved seams.
- Compact small-arm bed
- Runs up to 7000 s.p.m.
Choose the SINGER S 8140 if…
SINGER's S 8140 is a direct-drive four-thread overlock machine built for up to 70% lower power consumption, with automatic lubrication (with oil filter), needle position control and easily adjustable differential feed.
Swami Enterprises is an authorized JACK dealer and importer. Swami Enterprises stocks SINGER machines as a stocking partner. 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-797 and the SINGER S 8140?
The catalog lists different roles for the two: compare the "best for" notes below and tell us your fabric and volume.
Which is better, the JACK JK-797 or the SINGER S 8140?
It depends on your fabric, operation and daily volume. The JACK JK-797 is described as: Small cylinder-bed, super-fast overlock with variable top feed — a compact bed for flexible, no-dislocation sewing on curved seams. The SINGER S 8140 is described as: SINGER's S 8140 is a direct-drive four-thread overlock machine built for up to 70% lower power consumption, with automatic lubrication (with oil filter), needle position control and easily adjustable differential feed.
What is the price of the JACK JK-797 and the SINGER S 8140?
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.