In many types of applications, particularly in small machines, equipment and devices, a closed loop type of timing belt are not practical or effective. For clocks, printers, ATM machines, computer parts and components and even in vending machines, an open end timing belt is a far superior option.
The Basic Considerations
These types of belts are also used in CNC machines in metal fabrication shops as well as in automated processing equipment and robotics. As automation and robotics become more standard in industrial uses, the need for a greater selection of standard and custom types of open end timing belt options will be a factor to consider.
The choice to use these types of open ended belts rather than a closed belt is typically due to the type of equipment. In general, one end of the belt is permanently attached to the equipment through some type of a clamp or mounting system.
The free end of the open end timing belt is then looped around the drive sprocket or pulley as well as potentially around an idler before the free end is then attached to a tensioner on the other side of the movable part or component. The design of the belt allows for linear motion in either direction, perfect for specific types of applications.
Strengthening Options
For any type of timing belt, including open end belts, it is possible to add fibers or reinforcement to the basic belt design. This will increase the life cycle of the belt and also help to reduce the risk of abrasion to the belt, which may result in poor performance or belt failure over time.
The most common choices in reinforcement materials including fiberglass, polyester, Kevlar and, in some cases, the use of steel fibers. When determining if these types of reinforcers are required, it will be essential to consider the specific application and the operating conditions for the equipment.
