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The YouYi Automation Products Center
All of YouYi's press automation solutions in one place.
Straightener/Leveling Machine
The SFL Precision Coil Straightener is designed for high-precision leveling of thin metal materials such as stainless steel, copper, iron, and aluminum. Equipped with precision-ground leveling rollers and a fine adjustment system, it delivers stable flatness and consistent leveling performance for coil materials from 0.2 to 1.2 mm thick.
Material width (mm): 100-500
Material thickness (mm): 0.2-1.2
Correction Speed (m/min): 15
Product Characteristics
The SFL Precision Straightener Machine is a high-precision thin metal sheet straightener designed for leveling coil materials from 0.2 mm to 1.2 mm thick. It removes coil set, edge waves, curvature, and residual stress to provide a flatter and more stable material surface before stamping, punching, forming, laser cutting, and other precision manufacturing processes.
Thin metal strips are particularly sensitive to deformation, roller pressure, and surface damage during coil processing. The SFL precision straightening machine uses a floating four-point adjustment system, fully driven leveling rollers, auxiliary support rollers, and precision-ground SUJ2 rollers to achieve controlled leveling while reducing the risk of surface scratches and uneven deformation.
The machine is suitable for stainless steel, copper, aluminum, galvanized steel, silicon steel, and other thin metal materials. It can be used as an independent leveling machine or integrated with an automatic decoiler and servo feeder to build a complete coil feeding line for precision stamping applications.
Youyi also provides a range of precision coil straightener for different material thicknesses and coil processing requirements.
The SFL series is designed for thin metal materials from 0.2 mm to 1.2 mm, helping remove coil set, edge waves, curvature, and residual stress before downstream processing.
The leveling rollers are manufactured from SUJ2 bearing steel, heat-treated to HRC 60, hard chrome plated, and precision ground to provide high wear resistance, dimensional stability, and consistent leveling performance.
The SFL precision straightener adopts a floating four-point balance fine-tuning mechanism, equipped with a dial indicator. Operators can quickly and accurately locate the optimal leveling position, improving setup efficiency and repeatability for different materials and thicknesses.
Auxiliary support rollers are installed inside the leveling section to support the main rollers, reduce roller deflection, and improve leveling stability when processing thin metal materials.
The upper and lower leveling rollers are fully driven to provide stable material movement and reduce the risk of slipping, uneven feeding, and surface damage during leveling.
The integrated lubrication system helps reduce friction and component wear, supporting stable operation and longer service life during continuous production.
The SFL precision straightener can process a variety of thin metal coil materials with thicknesses from 0.2 mm to 1.2 mm, including:
Stainless steel
Copper
Aluminum
Galvanized steel
Silicon steel
Cold-rolled steel
Other thin non-ferrous and ferrous metal strips
Material properties such as thickness, width, tensile strength, yield strength, and required flatness should be considered when selecting the appropriate straightener configuration.
In a precision electronics stamping production line, the SFL Type Precision Straightener is integrated with an automatic uncoiler and a servo roll feeder to form a fully automated coil handling and feeding system. This setup is used to process thin stainless steel and copper coils with thicknesses ranging from 0.2mm to 1.2mm.
The automatic uncoiler ensures smooth and safe coil unwinding, while the SFL straightener delivers excellent leveling performance. The high-speed servo feeder provides accurate and stable material feeding into the press.
This complete solution greatly improves production efficiency, reduces material waste, and ensures high surface quality—ideal for precision components manufacturing in industries such as 3C electronics, connectors, and small metal parts.
The SFL series is specifically developed for thin metal materials from 0.2 mm to 1.2 mm, providing controlled leveling performance for precision stamping and coil processing applications.
Fully driven leveling rollers and precision-ground SUJ2 rollers help maintain stable material movement while reducing the risk of slipping and surface damage during straightening.
The SFL precision straightener can be integrated with automatic decoilers, servo feeders, and stamping presses to create a complete automated coil feeding system.
Youyi can configure straightening and feeding systems according to material thickness, width, material type, production speed, and downstream stamping requirements.
With more than 20 years of experience in stamping automation equipment manufacturing, Youyi provides precision straighteners, decoilers, servo feeders, and complete coil feeding solutions for customers in electronics, automotive, new energy, home appliance, and other industries.
Choosing the correct straightener depends on several factors, including material thickness, material width, material type, required flatness, production speed, and the downstream stamping process.
For thin materials between 0.2 mm and 1.2 mm, a precision straightener with accurate roller adjustment and stable material support is important to prevent over-leveling, surface damage, and residual deformation.
Before selecting a machine, manufacturers should consider:
Material thickness and width
Stainless steel, copper, aluminum, or other material types
Required flatness tolerance
Coil processing speed
Required feeding accuracy
Integration with a decoiler and servo feeder
Production volume and automation requirements
For high-precision thin-sheet stamping applications, the SFL series provides a suitable solution for controlled leveling and stable material feeding.
1、What thickness can the SFL precision straightener process?
The machine is designed for thin metal materials ranging from 0.2 mm to 1.2 mm, providing excellent leveling performance for precision applications.
2、Can the straightener handle stainless steel?
Yes. The SFL straightener is suitable for stainless steel, copper, aluminum, galvanized steel, and other thin metal strips.
3、Does the machine remove coil set?
Yes. The precision leveling rollers effectively eliminate coil set, edge waves, and residual stress, improving sheet flatness before stamping.
4、Can it be integrated into an automatic coil feeding line?
Absolutely. It can work together with decoilers, servo roll feeders, and stamping presses to build a fully automated coil feeding system.
5、Why are SUJ2 rollers used?
Imported SUJ2 bearing steel offers excellent hardness, wear resistance, and dimensional stability, ensuring long service life and consistent leveling accuracy.
Technical Parameters
| Mode | SFL-100 | SFL-200 | SFL-300 | SFL-400 | SFL-500 |
| Material width mm | 100 | 200 | 300 | 400 | 500 |
| Feeding thickness mm | 0.2-1.2 | 0.2-1.2 | 0.2-1.2 | 0.2-1.2 | 0.2-1.2 |
| Correction speed m/min | 15 | 15 | 15 | 15 | 15 |
| Motor specifications HP | 1 | 1 | 2 | 2 | 3 |
| Coarse wheel diameter | Middle 30 | Middle 30 | Middle 30 | Middle 30 | Middle 30 |
| Number of coarse wheels | Up 9/Down 10 | Up 9/Down 10 | Up 9/Down 10 | Up 9/Down 10 | Up 9/Down 10 |
| Body weight Kg | 200 | 230 | 260 | 290 | 320 |
| Dimensions mm | 800x900x1250 | 800x950x1250 | 800x1000x1250 | 800x1050x1250 | 800x1100x1250 |
Application
1600 Large-Scale New Energy Lithium Battery Aluminum Casing Blanking Dedicated Automated Stamping Line
Thick-Sheet 3-in-1 Decoiler, Leveler & Feeder System for Automotive Stamping Applications
Customized Dual-Uncoiler 3-in-1 Feeding Line for Automated Stamping of Smart Furniture Hardware Components
2-in-1 Decoiler & Leveling Machines with Servo Feeders: Enhancing Precision in 3C Industry Automation
Ready to streamline your production with reliable stamping automation solutions that boost efficiency, reduce downtime!
Related Products
SNL Type Single/Two stage Precision Straightener (Thickness: 0.1-0.6mm)
SNL Type Precision Straightener is designed for leveling thin coil materials from 0.1mm to 0.6mm. Available in single-stage and two-stage structures, it ensures high precision and surface protection for stainless steel, copper, and aluminum strips
FJS Type high-speed straightener (Thickness: 0.3-1.5mm)
A high-speed precision straightener for 0.3–1.5 mm coil materials, featuring S-type material guidance and automatic speed synchronization for stable stamping and silicon steel processing.
GJ Type High precision straightener (Thickness: 0.0.5-0.6mm)
High-Precision Design: Engineered specifically for stamping medium-thin materials requiring micron-level accuracy.
HCL Type Heavy Duty Coil Straightener(Thickness: 1-6mm)
The leveling adjustment mechanism integrates a compact worm gear and worm wheel system, ensuring smooth torque transmission with reverse self-locking capability.
FAQ
Q: How do I determine the right feeder size for my production line?
A: The feeder size depends on the material width, thickness, and feeding step distance required by your stamping press. Choosing the correct specifications ensures smooth operation and prevents feeding errors or misalignment.
Q: What factors should I consider when choosing a servo feeder machine?
A: When selecting a servo feeder, key factors include feeding accuracy (±0.05mm or better), maximum feeding speed (e.g., 20m/min), material compatibility (stainless steel, aluminum, etc.), load capacity, and control system (PLC or touchscreen). Ensure the machine matches your stamping process requirements.
Q: How do I choose the right decoiler, straightener and feeder?
A: Select based on material type, width, thickness, coil weight, and required speed. Match decoiler capacity to coil size, choose a straightener for material strength, and a feeder that meets feed length and precision. Ensure compatibility with your press and automation level.
Q: Coil feeder vs servo feeder: what’s the difference?
A: A coil feeder is a broader system for continuous coil feeding, often integrated with decoiler and straightener. A servo feeder uses servo motors for precise, programmable feeding, ideal for short pitches and high accuracy applications.
Q: How to choose decoiler capacity?
A: Select a decoiler rated 10–20% above your maximum coil weight. Confirm inner diameter (I.D.) compatibility and outer diameter limits. Adjustable mandrels are recommended if you run multiple coil sizes.
Q: What feed precision can I expect?
A: Servo feeders typically achieve ±0.01–0.05 mm, with high-end models reaching ±0.005 mm. Mechanical feeders usually provide ±0.02–0.1 mm. Actual accuracy depends on material properties and straightening quality.
Q: How does material affect machine selection?
A: High-strength materials need stronger straightening and drive systems. Thin materials require low-pressure handling. Soft materials like aluminum need anti-scratch solutions.
Q: What affects feeding accuracy most?
A: Key factors include feeder precision, servo tuning, straightener setup, material quality, and press stability. Poor setup or worn dies can reduce accuracy.
Q: What spare parts should be prepared?
A: Common spares include bearings, belts, sensors, seals, guide blocks, and lubrication parts. Keeping key components reduces downtime and improves maintenance efficiency.
Q: Can feeders be retrofitted to existing presses?
A: Yes, most systems support retrofitting. Check press dimensions, feed height, control compatibility, and safety requirements before installation.
Q: How long does it take to receive the feeder machine after placing an order?
A: Lead time for delivery typically ranges from 4 to 8 weeks depending on customization, production schedules, and shipping location. Once your order is confirmed, we will provide a more precise delivery estimate.
Q: What are your payment terms?
A: We accepts T/T payment, 30% deposit and 70% balance before shipping
Q: How often should I perform maintenance on my servo feeder machine?
A: Routine maintenance should be conducted weekly for basic cleaning and lubrication, while a more thorough inspection should be done monthly to check for wear on rollers, belts, and electrical components. A full servicing is recommended every 6-12 months depending on usage intensity.
Q: What are the most common issues with feeder machines, and how can I troubleshoot them?
A: Common issues include misalignment, inconsistent feeding accuracy, or motor failure. Check for loose bolts, dirt buildup, or software calibration errors. If problems persist, refer to the user manual or contact technical support.
Q: Do you provide on-site repair services if my machine breaks down?
A: Yes, we offer on-site repair services for major issues, along with remote troubleshooting support for minor problems. For urgent cases, we can dispatch a technician within 24-48 hours, depending on your location.
Q: What is the maintenance cycle?
A: Daily cleaning and inspection; weekly check belts, air lines; monthly inspect bearings and guides; yearly replace worn parts. Adjust frequency based on operating hours and workload.
Q: What's the package of your coil feeding machines?
A: For the coil feeding equipment that go LCL shipping, We will use plastic films wrap on the equiment, and then fix it into a wooden box.
For the large coil lines that go FCL shipment, We will fix each part with ropes on the shipping container and then wrapped them with plastic films.
Q: What is the typical lead time?
A: Standard machines usually take 4–8 weeks. Customized systems or full production lines may require 10–20+ weeks depending on complexity and production schedule.
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