What Defines a Single Needle Lockstitch Machine
A single needle lockstitch machine uses one needle and one bobbin thread to create a lock stitch that holds from both sides. It is the default choice for seams on woven fabrics, and it is the machine most buyers specify first when equipping a line. The three models below share that basic stitch formation but differ in feed system, drive type and added functions, which is what determines the jobs each one handles well.
The Three Single Needle Models
AS500-1S6 — a step motor direct-drive machine running at 5,000 RPM, using a DBX1 needle and fitted with a cooling fan. It is built for light and medium-heavy fabrics, with jeans and silk both named as suitable materials. The combination of high speed and a cooling fan makes it a reasonable fit for continuous production on mixed fabric weights.
AS777EC-1S — a 550 W step motor machine running at 5,000 stitches per minute with a built-in edge cutter. The integrated cutter trims the seam edge as it sews, which removes a separate trimming step on jobs where a clean edge matters.
AS5492-1ST-OF — a bottom differential feed machine running at 4,000 stitches per minute. Differential feed controls how the lower feed dogs move relative to each other, which helps manage stretch, slip and puckering on difficult materials.
| Model | Drive | Speed | Distinguishing feature | Typical fit |
|---|---|---|---|---|
| AS500-1S6 | Step motor direct drive | 5,000 RPM | Cooling fan, DBX1 needle | Light to medium-heavy fabrics, jeans, silk |
| AS777EC-1S | 550 W step motor | 5,000 sti/min | Built-in edge cutter | Seams needing a trimmed edge |
| AS5492-1ST-OF | Step motor | 4,000 sti/min | Bottom differential feed | Materials prone to stretching or puckering |
Matching the Machine to the Sewing Job
Choose by the behaviour of the fabric and the finish the seam needs, not by speed alone. The AS500-1S6 covers the widest everyday range and is the sensible starting point for general light and medium-heavy work. Where the seam edge must be clean and consistent, the built-in cutter on the AS777EC-1S saves a handling step. Where the material stretches, slips or puckers under a standard feed, the bottom differential feed of the AS5492-1ST-OF is the relevant function to specify.
Buyers who need a trimmed edge should also review the wider Lockstitch Machines with Edge Cutter range, and those working with difficult fabrics should look at Differential Feed Lockstitch Machines. Full details for the general-purpose model are on the AS500-1S6 Direct Drive Lockstitch Machine page.
What to Confirm in a Quotation
Specifications are confirmed on quotation, so bring the following to the enquiry:
- Fabric type and weight, with samples if possible
- Thread type and size to be used
- Table and stand configuration required
- Voltage and plug standard at the destination
- Any attachment or folder needs for the seam
- Spare parts you want supplied with the machines
Our one-stop service covers product customization, quality inspection, installation and debugging, after-sales maintenance, spare parts supply, and logistics and transportation. Certificates available upon request.
Buyer Checklist
- Confirm the fabric and thread match the machine's intended range
- Decide whether an edge cutter or differential feed is needed
- Confirm table, stand, voltage and plug before ordering
- Ask which spare parts are recommended as initial stock
- Confirm delivery terms and documentation on the quotation
Request a Quotation
Tell us your fabric, thread, table and stand needs and the voltage at your destination, and we will confirm the right configuration and specification on quotation. Send your requirements through the contact page to get started.