Carrying Idler sets is used to support the loaded section of the belt and move the material. They are located in the upper part of the conveyor.

Carrying Troughing Type Idler:

Most carrying sets have a Troughing shape which allows greater amounts of material to be conveyed. These shape the belt to prevent spillage and are available with 10°, 20°, 30°, 35° and 45° trough angles with equal or unequal roller lengths. Troughing carrying sets have 3 equal length or 2 equal length rollers supported within the base frame which is fixed to the conveyor structure. Normal spacing is 1m to 1.6 m. This type of idler’s spindle end is drop in type so it can be replaced very easily. In this type of idler two mounting methods of Idler on frame one is In Line which is most common used and other is staggered type.

Carrying Vee Type Idler:

This type of idler is used in less demanding environments where belt speeds are generally less than 2.5 m/s. It is designed for transporting small grain material (gravel, sand). Due to the shape of the trough it has a lower transportation output than a troughing idler however this is compensated for by its lower cost (amongst other things there is a 1/3 lower need for rollers). This type of idler’s spindle end is also drop in type so it can be replaced very easily.

Carrying Cantilever Type Idler:

This idler comprises of a central bracket and two rollers without side brackets. It is designed for less demanding environments and short length conveyors (e.g. discharge conveyors of screeners). They are advantageous due to their significantly lower demand on space. This type of idler’s spindle end type is not drop in type and it is mounted with only one end of spindle.

Carrying Flat Type Idler:

These have a single roller supported by two brackets fixed to the conveyor structure. They are used in picking, sorting and unit materials handling applications. Load capacity is much less than that of Troughing idlers because of the long shaft length and only two bearings. This type of idler’s spindle end can be either drop in type with additional internal/external thread on customer demand.

Carrying Garland (suspended) Type Idler:

Consists of several (3 or 5) rollers, attached together by a chain link. Contrary to Troughing sets the maximum angle of the side rollers is 60°. This design leads to greater flexibility of the structure which results in improved belt centring, load containment, higher working speeds and load capacity, better absorption of dynamic stresses during conveying large bulky material, less shut down time and lower installation and maintenance costs.