Top Idlers

Top idlers also known as troughing idlers and carrying idler as per order requirement we are manufacturing top idlers.

“Top idler” is a general term for an idler on the carrying side of a conveyor belt, also known as a carrying idler or a troughing idler. Its technical specifications are crucial for ensuring the conveyor’s proper function and lifespan. They include:

Load and Performance Specifications

• CEMA Class Rating: This is a crucial standard that defines the idler’s maximum load-carrying capacity. CEMA classes range from B (lightest duty) to F (heaviest duty), with higher classes featuring stronger shafts, larger bearings, and thicker components.
• Belt Speed: The idler must be rated for the operating speed of the conveyor belt. High speeds require larger-diameter rolls to maintain a proper bearing service life.
• Load Rating: This is the maximum weight per foot of the combination of the belt and the conveyed material that the idler can safely support.

Dimensional and Construction Specifications

• Belt Width: The idler set is designed to match a specific conveyor belt width, ensuring the rolls fully support the belt.
• Troughing Angle: This is the angle of the two outer “wing” rolls. Common angles are 20°, 35°, and 45°, with a deeper angle providing better material containment and higher capacity.
• Roll Diameter: The diameter of the individual rollers (e.g., 4″, 5″, 6″, 7″, or 8″). It’s selected based on the CEMA class and belt speed.
• Shaft and Bearings: The shaft is oversized and the bearings (typically sealed ball bearings) are specified to withstand the radial and thrust loads. Robust sealing systems, like triple labyrinth seals, are essential to protect the bearings from contaminants.
• Materials: The rolls are typically made from steel tubing, while the frame is constructed from a steel channel or angle iron, with a gauge suitable for the specific CEMA class.