Conveyor equal
troughing idlers

Belt width determines idler roll length. Standard widths include 18, 24, 30, 36, 42, 48, 60, and 72 inches.

Measure the angle between the center roll and wing rolls. Common trough angles are 20°, 35°, and 45°.

Calculate the required CEMA rating (B, C, D, E, or F) based on belt width, material density, belt speed, and conveyor length.

Standard roll diameters range from 4 to 6 inches for equal troughing idlers, depending on CEMA class. Higher belt speeds and heavier loads require larger diameter rolls.

Note whether your existing idlers use standard top mount (conventional bracket mounting) or channel inset mounting (low-profile installation for clearance-restricted applications).

Match bearing type and seal configuration to your operating environment.

Standard steel rolls suit most applications. Specify rubber-cushioned rolls for impact absorption at loading zones or corrosive environments. For impact zones and corrosive environments, see rubber equal troughing idlers.

Standard painted frames work for general applications. Select galvanized or stainless steel frames for corrosive environments.

Spacing is typically 3.5–4 feet on standard runs and tighter in loading zones. This controls belt sag.