Home / Sewing Machines / Buttonhole Machines / SF-1790A-DH
SAFE · Buttonhole
SF-1790A-DHComputerized Direct-Drive Buttonhole Sewing Machine
The SF-1790A-DH is a computerized industrial buttonhole machine with Dahao control and direct-drive operation. The listed configuration uses a single-phase 220 V supply.
Compare this model with buttonhole & eyelet machines, or use our machine selection enquiry guide to prepare your requirements.
SAFE catalogue product imageProduct advantages
Details that support the operation.
- 01Dahao control system
- 02Direct-drive AC servo motor
- 03Electronic needle thread tension control
- 04Automatic presser foot lifting
- 05Built-in bobbin winder
Applications & sewing operations
Review it against your production task.
- Buttonhole sewing
Send your material and intended seam for configuration review. Optional functions and attachments should be confirmed in the quotation.
Technical data
Specifications.
Specifications follow the reviewed SAFE v06 catalogue. Confirm your final machine configuration in the quotation.
| Specification | Details |
|---|---|
| Power supply | Single-phase 220 V |
| Standard buttonhole length | Up to 41 mm |
| Standard patterns | 31 |
| Pattern storage | Up to 99 patterns |
| Needle bar stroke | 34.6 mm |
| Packing dimensions (L × W × H) | 760 × 380 × 550 mm |
| Optional buttonhole lengths | 70 mm / 120 mm |
Before you choose
Questions about this machine.
What power supply does the SF-1790A-DH require?
It uses a single-phase 220 V supply. The catalogue lists a compact AC servo motor with direct drive and a Dahao control system.
What buttonhole length is available?
The standard maximum buttonhole length is 41 mm. The catalogue lists 70 mm and 120 mm as optional specifications; include your required length in the enquiry.
How many patterns can be stored?
The machine has 31 standard patterns and can store up to 99 patterns. Needle-thread tension is electronically controlled.
What should I specify for a computerized buttonhole sewing machine?
Send the buttonhole shape and length, fabric, layer count, thread and finished sample. Include the full model suffix and electrical supply so the sewing configuration and controls can be confirmed for your garment.
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-1790A-DH.
Share your material, seam photo and quantity with Trentzhou.