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SAFE · Overlock
SF-K9-4ATAutomatic Thread-Trimming Overlock Sewing Machine
The SF-K9-4AT is an automatic thread-trimming overlock sewing machine for garment production. Direct drive and presser-foot lifting support its configured overedge sewing operations.
Compare this model with overlock machines, or use our machine selection enquiry guide to prepare your requirements.
SAFE catalogue product imageProduct advantages
Details that support the operation.
- 01Stepper-controlled automatic thread trimming
- 02Automatic presser-foot lifting
- 03Built-in direct-drive motor
- 04Automatic start, sewing and stop functions
- 05Waste suction and collection
Applications & sewing operations
Review it against your production task.
- Knitted underwear
- Garment overlocking
- Leather products
Send your material and intended seam for configuration review. Optional functions and attachments should be confirmed in the quotation.
From the SAFE catalogue
A closer look.
Technical data
Specifications.
Specifications follow the reviewed SAFE v06 catalogue. Confirm your final machine configuration in the quotation.
| Specification | Details |
|---|---|
| Needles | 2 |
| Threads | 4 |
| Maximum speed | 7,000 rpm |
| Stitch length | 0.6–3.8 mm |
| Differential ratio | 0.7–2 |
| Presser foot lift | 6 mm |
| Needle system | DC × 27, #11 |
Before you choose
Questions about this machine.
How many needles and threads does this configuration use?
The SF-K9-4AT is listed as a two-needle, four-thread overlock machine. Its stitch-length range is 0.6–3.8 mm and its differential-feed ratio is 0.7–2.
Are thread trimming and presser-foot lifting automatic?
Yes. The catalogue describes stepper-controlled automatic thread trimming and presser-foot lifting, together with automatic start, sewing and stop functions.
Which products is it intended to sew?
The catalogue lists knitted underwear, light- to heavy-weight garments and leather products. Share your fabric and seam requirements when requesting a configuration.
Can I use this industrial serger sewing machine for knit garments?
The catalogue includes knitted underwear applications. Send the stretch fabric, layer count and seam sample to review the needle/thread configuration and handling setup. Automatic trimming does not remove the need to match the seam and adjust the feed.
Ordering & after-sales
Support beyond the machine.
Tell us where the machine will be used and the configuration you require.
From one machineOrders for factories and dealers
1-year warrantyMachine warranty and spare parts supply
Remote technical supportShare model, issue and a short video
Pakistan officesKarachi and Faisalabad contacts
Continue your machine selection
Related equipment and operations.
Compare the handling method and finished seam. These machines cover different configurations or neighbouring production steps; confirm the right choice against your sample.
Discuss your SF-K9-4AT.
Share your material, seam photo and quantity with Trentzhou.