Zhejiang Nanyuan Sewing Equipment Co., Ltd. is one of the leading manufacturers and suppliers of digital overlock sewing machine in China, featured by quality products and low price. Welcome to buy bulk automatic sewing machines for sale here and get quotation from our factory. Customized orders are welcome.
NY-EXT-4UT Digital Overlock Sewing Machine
The NY-EXT-4UT Digital Overlock Sewing Machine represents the next generation of industrial serger technology. Engineered with a precision stepper motor drive system and full triple-automation (Auto Cut + Auto Presser Foot Lift + Auto Sewing), this 4-thread overlock machine delivers unmatched efficiency, precision, and operator comfort - all in one intelligent package.
Unlike conventional mechanical overlock machines, the NY-EXT-4UT uses stepper motor digital control to achieve needle-stop positioning, real-time speed adjustment, and seamless automated workflows.
Its 550W industrial-grade motor powers through thin, medium, and heavy fabrics with equal consistency, making it the only truly digital overlock solution in the Nanyuan lineup.
Whether you run a small tailoring studio or a high-volume garment factory, the NY-EXT-4UT reduces manual labor, increases throughput, and produces professional-grade overlock seams that meet export-quality standards.
Key Selling Points
Stepper Motor Digital Drive - Precision Redefined
Unlike traditional clutch motors, the stepper motor delivers micro-step precision for needle 'positioning, speed control, and auto-functions. Consistent stitch quality across all speeds, 'zero drift over long production runs.
Triple Automation = Triple Efficiency
· ① Auto Thread Cutting - clean, consistent cuts every time;
② Auto Presser Foot Lift - 'hands-free operation for faster fabric handling;
③ Auto Sewing - pre-set seam parameters, 'start and go. Together they reduce operator fatigue by up to 60% and boost output by 30-50%.
Heavy-Duty Ready
· The highest motor rating in its class. Powers through denim, canvas, and multi-layer assemblies 'without bogging down. 220V single-phase operation fits standard industrial power setups worldwide.
Real-Time Speed Adjustment
n Dial in the perfect speed for each fabric type - slow for silk and chiffon, fast for denim and 'cotton canvas. No pulleys to change, no belts to swap. Instant digital control.
Mute Design
· Advanced noise reduction technology cuts operating noise to well below industry average. 'Less fatigue, better focus, happier workers - and compliant with tightening factory noise regulations.
Energy Conservation
Stepper motor + intelligent power management reduces electricity consumption by up to 40% compared to conventional clutch-motor overlock machines. Green manufacturing without sacrificing performance.
Needle Stop Position Control
· Programmable needle parking - set to stop up for fabric rotation at corners, or down for 'continuous straight runs. A feature typically found only on top-tier computerized lockstitch machines.
2-Needle 4-Thread Configuration
· Produces a strong, elastic 4-thread safety stitch that trims, seams, and overlocks in one pass. '5.5mm overlock width with adjustable differential feed (0.7-2.0) ensures perfect feeding for stretch knits, woven fabrics, and everything in between.
Technical Specifications
| Parameter | Specification |
Model
| NY-EXT-4UT
|
Product Name
| Digital Overlock Sewing Machine
|
Number of Needles
| 2
|
Needle Type
| DC x 27 (#11 - #16)
|
Number of Threads
| 4
|
Overlock Width
| 5.5 mm
|
Differential Feed Ratio
| 0.7 - 2.0 (Adjustable)
|
Motor Type
| Stepper Motor (Digital Drive)
|
Motor Power
| 550 W
|
Voltage
| 220 V (Single Phase)
|
Needle Stop Position
| Up / Down (Programmable)
|
Auto Functions
| Auto Cut + Auto Presser Foot Lift + Auto Sewing
|
Speed Control
| Real-Time Digital Adjustment
|
Noise Level
| Mute Design (Below Industry Average)
|
Energy Saving
| Up to 40% vs. Conventional Clutch Motor
|
Fabric Compatibility
| Light, Medium, Heavy
|
Application Scenarios
Why Choose Nanyuan - The Manufacturer
Founded in 2000, Zhejiang Nanyuan Sewing Equipment Co., Ltd. has grown into a trusted global 'supplier of industrial and household sewing machines. Our factory in Lishui, Zhejiang Province, 'China, integrates R&D, production, and quality control under one roof.
In-house innovation drives our product development. Every Nanyuan machine incorporates patented 'mechanisms that improve reliability, reduce maintenance, and extend service life.
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FAQ
Q: What makes this a "digital" overlock machine? How is it different from a regular overlock machine?
A: Unlike conventional mechanical overlock machines that use clutch motors and manual controls, the NY-EXT-4UT features a stepper motor digital drive system. This enables programmable needle stop position (up/down), real-time digital speed adjustment, and full automation of thread cutting, presser foot lifting, and sewing - all controlled by an onboard microprocessor. It is the difference between driving a manual transmission car and a modern automatic with cruise control.
Q: Can one operator handle more workload with this machine compared to a standard overlock?
A: Yes. The triple automation (Auto Cut + Auto Presser Foot Lift + Auto Sewing) eliminates the most time-consuming manual operations. Our field data shows 30-50% throughput improvement for experienced operators and a steeper learning curve for new hires. The mute design also reduces fatigue over 8-10 hour shifts.
Q: What fabrics can this machine handle? Is it only for lightweight materials?
A: The NY-EXT-4UT handles light, medium, and heavy fabrics. With 550W power and adjustable differential feed (0.7-2.0), it processes silk and chiffon at low speeds just as smoothly as it powers through denim, canvas, and multi-layer assemblies at high speeds. Real-time speed adjustment lets you fine-tune for each fabric type.
Q: How energy-efficient is the stepper motor compared to a traditional clutch motor?
A: The stepper motor consumes up to 40% less electricity than a conventional clutch motor of equivalent power rating. Unlike a clutch motor that runs continuously and wastes energy as heat, the stepper motor draws power only when actively sewing. Over a year of full-shift operation, the electricity savings alone can offset a significant portion of the machine cost.
Q: Is the machine noisy? Our factory already has high noise levels.
A: The NY-EXT-4UT incorporates dedicated mute/noise-reduction technology that keeps operating noise well below industry average for industrial overlock machines. This is particularly valuable for factories facing tightening workplace noise regulations or those seeking to improve operator comfort and retention.
Q: What about maintenance and spare parts availability?
A: Nanyuan provides a 12-month full machine warranty and 6-month motor warranty. Spare parts are dispatched within 48 hours of order confirmation. The stepper motor is a sealed unit requiring minimal maintenance compared to traditional clutch motors. We also provide video-call technical support for troubleshooting and routine maintenance guidance.
Q: Can you customize the machine for my brand (OEM/ODM)?
A: Absolutely. Nanyuan offers flexible OEM/ODM services including custom color panels, branding decals, packaging design, and configuration packages tailored to your target market. Contact our sales team with your requirements for a customized quotation.
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