NEWS & EVENTS
Aogang Machinery Co., Ltd.
Aogang Machinery Co., Ltd.
Dec. 17, 2025
In modern industries such as steel, non-ferrous metals, and composite materials, efficient and precise slitting of wide metal coils into narrow strips of specified widths is a critical step in the production chain. A coil slitting line not only improves material utilization, but also provides stable and reliable raw materials for tube manufacturing, cold roll forming, and downstream metal processing through a high level of automation and precise control.
A Coil Slitting Line, also known as a coil slitting production line or slitting line, is a continuous automated system that integrates uncoiling, guiding, longitudinal slitting, tension control, and recoiling.
Its primary function is to slit large master coils—such as steel coils, aluminum coils, or stainless steel coils—into multiple narrow strips according to preset widths, and then rewind them into neat, tightly wound finished coils for subsequent processes such as tube making, stamping, and roll forming.
As an essential piece of equipment for metal processing and material pre-treatment, the coil slitting line plays a key role in improving production efficiency and ensuring product consistency.
A standard coil slitting line typically operates continuously according to the following steps:
The master coil is placed on the uncoiler using an overhead crane or coil car. The material is smoothly uncoiled, and the strip head is prepared to ensure continuous production.
The strip passes through a leveling unit to eliminate internal stress and wave deformation, ensuring good flatness before slitting.
The strip enters the slitting machine, where upper and lower circular knife shafts slit the material precisely according to the preset widths. Proper knife clearance and cutting methods allow the line to process different materials and thicknesses effectively.
The edge scrap generated during slitting is collected by a scrap rewinder or scrap chopper, keeping the production line clean and safe.
A stable tension control system applies constant tension to each slit strip, preventing loose winding, strip wandering, or interlayer slippage. The finished strips are then rewound into compact coils.
Once the preset length is reached, the finished coils are automatically unloaded, strapped, protected, and labeled for subsequent processing or transportation.
The core working principle of a coil slitting line is circular knife slitting combined with precise tension control.
By accurately controlling knife shaft positioning, cutting clearance, and running tension, the line achieves stable, continuous longitudinal slitting at high speed, producing slit coils with clean edges and consistent dimensions.
Coil slitting lines are widely used in various metal processing and manufacturing industries, including but not limited to:
Tube and pipe manufacturing (ERW pipes, square and rectangular tubes)
Cold roll forming and roll forming industries
Automotive component manufacturing
Home appliance and hardware processing
Building structures and metal construction materials
A: Common applicable materials include hot-rolled steel coils (HR), cold-rolled steel coils (CR), galvanized steel coils (GI), stainless steel coils, and certain non-ferrous metal coils. The exact range depends on the equipment configuration.
A: The applicable range varies by model and can be customized according to the customer’s material specifications.
A: Yes. It mainly depends on the uncoiler structure and load capacity and can be reinforced based on customer requirements.
A: With proper configuration, the line can meet standard accuracy requirements for tube manufacturing and cold roll forming applications.
A: With appropriate knife clearance and tension control, smooth edges with minimal burrs can be achieved.
A: The number of strips depends on the master coil width, minimum finished strip width, and knife shaft configuration.
A: The design line speed varies by equipment specification. Actual speed depends on material thickness and the number of slit strips.
A: The system typically uses PLC and touchscreen control, offering intuitive operation with training support available.
A: This depends on the knife shaft design and operator experience. A well-designed system helps reduce downtime.
A: Yes. The line can be configured according to production capacity, material specifications, and workshop conditions.
A: Installation guidance, commissioning, and operator training are available, along with long-term technical support.
A: With proper tension control and slitting quality, the slit coils can meet the requirements of high-speed tube manufacturing.
As a professional manufacturer of industrial metal processing equipment, Aogang coil slitting lines combine advanced technology with rigorous manufacturing standards to deliver efficient, precise, and stable slitting solutions.
Advanced control systems and automated design significantly reduce manual intervention and non-productive time, improving overall efficiency and stability—especially suitable for frequent specification changes and multi-size production.
Aogang slitting lines produce clean, smooth cuts with burr-free and scratch-free edges. Finished coils maintain excellent surface quality, meeting the strict requirements of high-end applications.
Precision knife shaft bearing systems ensure accurate cutting with minimal shaft deflection. Combined with precise tension control, each slit coil maintains uniform shape and consistent length, ideal for downstream tube making and forming processes.
Aogang coil slitting lines are suitable for a wide range of materials, including hot-rolled steel, cold-rolled steel, stainless steel, and aluminum. Customized configurations are available for coil widths from 300–2500 mm and thicknesses from 0.3–8 mm, meeting diverse industrial needs.
High operating speed and quick knife-change design reduce downtime and increase output. Regenerative braking and energy-efficient drive systems help lower energy consumption and operating costs.
For coated steel, annealed stainless steel, or automotive-grade materials, Aogang provides dedicated braking and tension control solutions to protect surface quality and minimize damage during processing.
Custom-designed tube mill solutions for your production needs
