Band brakes are simplistic braking systems that are sometimes included as secondary brakes that can be utilized in the event that the primary braking system should fail. While designs vary slightly, a basic band brake involves the use of some type of band that is placed around a cylinder. When tightened, the bank causes the cylinder to slow and eventually stop its rotation, which in turn causes the machinery involved to also come to a stop. This type of band break assembly is commonly employed on some machinery as a backup to other braking systems, and may even be the primary brake assembly for various types of hoists, power saws, transmissions, and bicycles.
One of the major benefits of a band brake is the simplicity of the design. With fewer moving parts that other types of braking systems, a band brake assembly is easily maintained and can work properly for a number of years with no breakdowns. As long as the drum or cylinder used in the design is kept clean and free from rust, there is little opportunity for any tugging or grabbing that would interfere with the braking action. As long as all the components are inspected and maintained properly, the brake will continue to efficiently control the speed of rotation and even stop that rotation if necessary.
There are potential drawbacks to the use of a band brake that make it important to consider the application before actually choosing to use this particular type of braking equipment. The brake is less likely to work efficiently in situations in which the drum or cylinder is exposed to moisture, such as rain or snow. In settings of this nature, the band or belt is likely to slip, either delaying the braking action or preventing it from occurring altogether. High temperatures can also interfere with the function of the brake, making it difficult to bring a task to a complete halt safely. For this reason, a band brake is often utilized with machinery such as winches or hoists rather than equipment that operates a high speeds.
Even with the potential liabilities of the band brake, this type of braking system may be installed as a backup to a main system. Typically, the use of the secondary braking method can be activated manually in the event that the primary system is rendered inoperative for some reason. While slower than some other braking solutions, the use of the band brake in various manufacturing and construction settings is common and is likely to continue for many years to come.
By Malcolm Tatum