As application conditions change in the workplace, so would the equipment needed. Kinder & Company has provided a guide to help select the right conveyor pulleys for different applications. The correct selection of Pulleys will optimise conveyor belt life, prevent damage from incorrect belt tracking and minimise material build up.
Conveyor pulleys can be specifically engineered, or selected from a standard pre-engineered range. Steel shells are usually made from heavy wall pipe but can also be rolled to specific dimensions. Stainless steel made steel shells is a recommended option for corrosive conditions.
A solid end disc construction, with minimum rim overhang, helps prevent the accumulation of material. A crowned finish is recommended for head or drive pulley application. All components are accurately machined to ensure concentricity.
Pulleys can be covered with a wide range of optional laggings to increase the coefficient of friction or reduce the wear on the pulley face. Cold bonded or hot vulcanised rubber can be used to help with such application in which they are moulded plain, diamond and herringbone grooved. However, ceramic offers the best resistance to wear and has very high coefficient of friction. The pattern is selected according to the operating conditions.
For shaft to end disc fitting, the recommended method is by internal locking the elements, which provide a demountable keyless high torque connection. The easy release capability permits the removal of the shell from the shaft for maintenance. Other types of shaft connections are available and these include compression hub, tape fit or welded shaft for the less critical applications. Each pulley is statically balanced on completion.
Self cleaning pulleys are designed and construction to perform in adverse conditions, especially where material tends to build up on the pulley face. The build up on pulley face is the primary cause of splice damage in conveyor belts. The principle of the Spiral and Winged pulleys is the inner, self cleaning tapered cone, which discharges material away from the belt. The Spiral type pulley is best for dry free flowing materials, while the Winged style pulley is best for large lumps, sharp and sticky materials.