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Maintaining A Stainless Slitting Line

    Stainless slitting line is high-performance machines that run at speeds up to 150 meter per minute. For these reasons, coil process equipment must be sure all line elements are properly maintained, which represents a titanic effort if they don’t understand what components are critical.

    A typical slitting line has the following components:

    • Coil storage
    • Coil car
    • Uncoiler
    • Peeler
    • Centering device
    • Pinch rolls
    • Straightener
    • Scrap shear and reject collector
    • Guides
    • Breaking rolls
    • Slitter
    • Knives
    • Movable tensioning device
    • Recoiler
    • Exit coil car

    These devices act as the link of a chain. If one of them fails, the complete chain fails. Users must be sure that any element in the line is ready to perform properly. And that depends to a great extent on machine maintenance.

    Routine Maintenance for SS Slitting Line

    The Operator need to develop routine maintenance procedures for these critical areas of a stainless slitting line.

    Hydraulic Oil

    Hydraulic oil must be prefiltered to eliminate the microparticles that fluids always have and that can be deposited on the tube’s walls. Sometimes the operator need use additives, but these additives must be compatible with the line mechanisms.


    Slitting line devices are powered by pressurized oil generated by a dedicated hydraulic group. Pumps should be checked every 2,000 hours to ensure that the right pressure and flow are achieved and bearings lubricated and cleaned thoroughly. The hydraulic tank should be cleaned every 1,500 hours.

    Solenoid Valves

    Solenoid valves, which act as the nerves of a system, connecting power to all elements, control and distribute clean oil. It’s important to check all seals every 1,000 hours. If new seals are needed, they should be coated with grease before installation to prevent them from being scratched because of friction.


    The hydraulic cylinders combine signals from solenoid valves and oil pressure to activate the various components, including the mandrels, straightener opening, felt pad opening, coil cars, and pinch rolls. Cylinders must be checked every 1,000 hours if they are activated frequently or 2,000 hours if they work intermittently.

    Stainless Slitting Line Tooling

    Separators and knives are the most imporatant conponents of Stainless Slitting line, which must be checked from time to time. During cutting, some knife scratches can be produced that increase the burr on the cuts and lowers the edge quality. At the least, a visual inspection should be done every 1,000 hours. Slitters equipped with automatic hydraulic clamping must be verified every 2,000 hours to guarantee the clamping force. The eccentric gap-adjusting device also should be checked every 2,000 hours.

    Electric Motors

    Many operators assume that electric motors do not require maintenance, especially AC motors. Not true. All motors require some sort of periodic maintenance.

    Electric Cabinets

    Every 2,000 hours electric cabinet filters must be changed. Also, every 2,000 hours safety switches need to be verified as well as cleaned of all the dust deposited, which is attracted by the electromagnetic fields of the electrical elements.

    Clutch and Brake. 

    Manipulation of a clutch and brake can unexpectedly activate some mechanisms, for instance, the shear, so extreme care must be taken to prevent injury. The clutch and brake should be checked every 1,000 hours. .

    Ball Screws

    In machines with a high degree of vibration, such as tensioning devices and slitters, screws must be checked every 1,000 hours and lubricated every 600 hours. They also should be secured with epoxy or wire.


    If an anomalous noise is heard, the whole device must be inspected and tested. Additionally, temperature levels should be measured every 1,000 hours, as well as oil levels, to lessen internal wear. An infrared thermometer is ideal for checking temperature.


    Many mechanisms are guided in one place or another. The clearance between these guides must be checked every 1,000 hours.


    Magnetic sensors or switches should be calibrated every 2,000 hours. It’s critical to maintain the correct distance between the sensor and the element.

    For more details of how to maintain a stainless slitting line. Contact us.

    Believe Industry Company have a full range of slitting lines for different material, Such as HR, CR, PPGI, GI, Full hard material and soft material, etc.

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