One needle, three threads
The SF-747D-3 is the three-thread version listed in the series specification table.
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SAFE · Industrial Sewing
SF-747D-3 Three-Thread Industrial Overlock Sewing Machine
The one-needle, three-thread configuration in the SF-747D family. Compare its edge width, differential feed and 7,000 rpm maximum with the four- and five-thread alternatives.
Machine configuration
What distinguishes SF-747D-3
7,000 rpm maximum
Its listed maximum differs from the 6,500 rpm rating of the four- and five-thread variants.
Adjustable stitch length
The catalogue lists a 0.5–3.8 mm stitch-length range and a 4 mm overedge width.
Compare the seam requirement
Choose the thread arrangement to suit the required seam. A three-thread configuration is not interchangeable with a five-thread specification.
Material & operation
Discuss the seam before choosing the configuration.
- Three-thread edge-finishing operations specified by a garment manufacturer.
- Overedge seam trials where thread count, fabric behaviour and finished edge width are defined.
- Distributors comparing SF-747D variants for different customer applications.
Send the model, material, seam sample or process video, quantity and delivery destination. We can then discuss the required configuration and the scope of supply.
Discuss Your ApplicationTechnical data
SF-747D-3 specifications
Source: SAFE v06 catalogue, printed page 6.
Maximum speed is a catalogue rating. Actual operating speed depends on the material and setup. Packing dimensions describe shipment packaging. Confirm the complete supplied configuration in your quotation.
View the SAFE Catalogue| Model | SF-747D-3 |
|---|---|
| Needles / threads | 1 / 3 |
| Needle system | DC×27 #9–14 |
| Needle gauge | Not applicable: single needle |
| Overedge width | 4 mm |
| Stitch length | 0.5–3.8 mm |
| Differential feed ratio | 0.7–2 |
| Presser-foot lift | 5.5 mm |
| Maximum speed | 7,000 rpm |
| Packing dimensions | 470 × 330 × 480 mm |
| Net / gross weight | 23.5 / 32 kg |
Before you choose
Questions about SF-747D-3
Is the SF-747D-3 a three-thread machine?
Yes. Its separate specification row lists one needle and three threads.
Can I choose it only because it has the highest speed rating?
No. First specify the seam construction and thread count. Maximum speed alone does not determine whether a machine is suitable for the operation.
Is the product photo unique to this variant?
The catalogue uses an SF-747D series photograph. This page identifies that shared photo and gives the separate SF-747D-3 specifications.
Compare configurations
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Talk to Trentzhou
Request a SF-747D-3 quotation.
Minimum order: one machine. One-year warranty, spare-parts supply and remote technical support are available.
trentzhou@millionindustry.com · WhatsApp +86 18757430046