Stable belts are used on drives having some means of belt tensioning, such as a movable pulley location or an external tensioning pulley, either spring loaded or locked in place after tensioning of the belt is completed.
These belts are typically used on individual belt drives or group drives where each belt is separately tensioned. Applications include high-speed power transmission, woodworking machinery, card readers, sorters, and printing machinery.
Semi-Stable belts allow the use of multiple belts with common take-up, or length adjustment. They can be used on wide belt conveying and on applications requiring good edge wear resistance for flanged or guided tracking. Specific applications include paper handling, food conveying (FDA approved) and check-weighing.
Semi-Stretch/Elastic belts were designed for fractional horsepower drives requiring a controlled stretch belt to provide the driving tension, at a specified circumference, when length adjustment or external tensioning is not available. Their major uses are as low-tension drive belts using fixed-center pulleys and as paper transport belts used in multiple sets on a common shaft, with either common take-up or no take- up at all (fixed-centered shafts). These belts are found in business and office machines, currency transports, vacuum transports,instrumentation, disk drives and film transports.
Stretch/Elastic (no woven carcass used) belts find similar applications to those of the semi-stretch types but provide greater range of elasticity, at a lower tension, per equivalent belt widths. Common applications include light-duty drives, paper, film and currency transports, vacuum transports and light-duty conveying.