Roller shutter Anatomy: learn how roller shutters work

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Roller shutter Anatomy: learn how roller shutters work

Roller shutter Anatomy: learn how roller shutters work


    Advanced Shopfront & Shutters LTD: You have enjoyed the security, insulation and other advantages a roller shutter provides. However, it will be advantageous for you to know the internal components of the shutter. Who knows the knowledge might help you in roller shutters repair. So we will look at the main components of a roller shutter-

    Cheek plate

    Also known as End plates, these are the two load-bearing plates which hold the roller shutter curtain in place. These are attached to the building structure through fixings.

    Flag post

    The cheek plate is welded to the top of the guide through welding or direct fixing. This gives the building a look similar to a flag post. The flag post’s vertical angle is given additional support by securing it through a vertical angle. It also aids in the installation of the shutter.

    Roller assembly

    The roller assembly consists of a full-width roller, which is supported by the cheek plates at each end. The roller has a steel tube with a motor fitted at one end. The motor is tubular. There is a shaft at the opposite end.

    Tubular Motor

    As already mentioned, the motor is fitted in the shutter. It is a part of the overhead barrel assembly. The motor head protrudes from the barrel. It is used for lending the element of manual override eye, limit switches, and an electrical wire feed. The limit switches control the maximum travel distance of the shutter curtain. The motor comes with an operational brake which holds the shutter in a stationary position.

    Centrifugal brake

    It arrests the descent of the shutter if the motor stops functioning. If the motor’s brake fails to stop the shutter or the shutters starts descending in an uncontrolled way, then the safety brake activates and halts the shutter completely. Some units also come with a micro switch which helps the motor in disconnecting the motor from the electrical supply. If the brake is activated even once, it needs to be reset or replaced. An engineer who specializes in shutters will be able to do the job.

    U- Cup or Bearing

    In case a safety brake is not fitted, a U-Cup or Bearing is fitted to provide support the barrel. It is attached to the cheek plate.


    The side guides are used to give support to the curtain which runs up and down through them. They are u shaped in design.


    It is the name given to the material which shuts the area between the guides. The guides are generally made of steel or aluminum. They are in the form of laths which interlock. In case the shutter has tube and link grilles, they are held together by rods which are horizontally-positioned.

    Bottom Rail

    It refers to the final bottom section of the curtain. It is often ‘T’ shaped or ‘L’ shaped which gives it additional rigidity.

    Canopy Cover

    It is also known as the hood. The material used in making it is galvanized steel. It is folded to wrap around the cheek plates to protect the curtain and barrel from the rain and dust. It also acts as a safety requirement if the roller mechanism or motor is below 2500mm height.


    Aluminum products can be coated with a silver looking finish or can be powder coated. Steel shutters have pre-treated galvanized curtains and powder coated side guides.

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