A brake band is a flat metal band that can be tightened or loosened around a shaft to slow or stop its rotation. It is used in various applications, including shifting equipment, chainsaws, tractors, go-karts, and emergency braking systems in automobiles. Other elements, such as an anchor and servo piston, are used to regulate the band’s pressure and manage its function.
A brake band is a device that is often included in a number of brake system designs. The band itself is usually a flat metal band that is smooth on top, but rougher on the bottom. Typically, the brake band is round, creating a loop that can be tightened or loosened around a shaft. The friction created when the belt is tensioned helps slow and eventually stop the rotation of that shaft.
A brake band is often used as part of shifting equipment attached to a drivetrain. In this application, it is not uncommon for the band to be composed of steel. The underside is lined with some type of friction material and the band is placed around the equipment drum. As the gears pull the tape, the spinning action of the drum is slowed down and stopped.
Along with the band and drum, there are many other elements that make up brake band equipment. An anchor is usually used to secure one end of the band to the transmission casing. This particular element helps regulate the amount of free play that exists between the drum and the brake band proper. An element known as a servo piston is used to apply pressure to the band, tightening or loosening the band’s pressure around the drum. This helps preserve the integrity of that pressure being applied to the drum and helps manage the function of the brake band. In some designs, additional hydraulic equipment is used to increase the efficiency of the pressure exerted on the drum and belt.
This same basic idea is used in other applications. A chainsaw band brake allows you to control the speed of the saw teeth, quickly going from a maximum speed to a complete stop. Tractors used in commercial farming often use brake band equipment as part of the overall engine and transmission design. Even a child’s go-kart can use this relatively simplistic design to control the speed of the device and bring it to a complete stop.
In many automotive designs, the brake band is considered an essential part of the emergency braking system. This means that if there is a problem with the main braking system, the vehicle operator can apply the emergency brake, which uses the band to slow the rotation of the front or rear wheels, gradually bringing the vehicle to a stop. While an emergency braking system generally does not respond as quickly as a primary system, this backup braking apparatus increases the potential to stop the vehicle’s forward motion before injury to the driver or other car occupants is caused or the truck.
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