Conveyor Idler Set

Complete Conveyor Idler Solutions for Reliable Bulk Material Handling

Our Conveyor Idler Sets are engineered to support the conveyor belt, maintain proper belt alignment, and provide smooth material conveying across demanding operating conditions. We supply complete solutions including Conveyor Bracket, Conveyor Roller Set, Impact Rollers, and Return Rollers, with configurations selected according to belt width, load, conveyor arrangement, material characteristics, and operating requirements.

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Conveyor Idler Set

What Is a Conveyor Idler Set?

A conveyor idler set is an assembly of conveyor rollers and supporting brackets designed to support the conveyor belt as it carries bulk material. The idler arrangement helps maintain belt shape, reduce belt sag, support the conveyed load, and provide smooth movement along the conveyor system.

Depending on the conveyor position and operating conditions, an idler set can be configured as a carrying idler, return idler, or impact idler. The selection depends on factors such as belt width, material load, conveyor speed, material characteristics, loading conditions, and installation arrangement.

Typical Idler Set Components: Conveyor Bracket  •  Conveyor Roller Set  •  Impact Rollers  •  Return Rollers

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Technical Details

01

Roller Diameter

76–159 mm

02

Belt Width

400–2400 mm

03

Idler Type

3-Roll / 2-Roll / 5-Roll

04

Trough Angle

20° / 35° / 45°

05

Roller Length

200–1200 mm

06

Shaft Diameter

20–40 mm

07

Tube Thickness

2.5–6 mm

08

Operating Temperature

−20°C to +80°C

Conveyor Idler Set Calculator

Enter your conveyor operating requirements to estimate the material load per idler and identify a suitable idler arrangement.

Estimated Idler Requirement

Material Flow Rate —
Estimated Load / Idler —
Recommended Application —
This calculator provides a preliminary engineering estimate. Final idler selection should also consider belt construction, lump size, impact conditions, conveyor geometry, roller diameter, bearing arrangement, and operating environment.

How To Select The Right Conveyor Idler Set

Select the idler set according to belt width, material load, roller diameter, trough angle and conveyor operating conditions.

STEP 01

Check Belt Width

Select an idler set that matches the conveyor belt width and provides adequate support across the loaded belt.

STEP 02

Select Roller Diameter

Choose the roller diameter according to belt speed, material load, roller length and required load capacity.

STEP 03

Determine Trough Angle

Select the required trough angle, commonly 20°, 35° or 45°, according to the conveyor design and material profile.

STEP 04

Calculate Material Load

Consider conveyor capacity, material bulk density, belt speed and loading conditions when selecting the idler arrangement.

STEP 05

Choose Idler Spacing

Select carrying, impact and return idler spacing based on belt load, belt tension and conveyor operating conditions.

STEP 06

Check Shaft & Bearing

Verify shaft diameter, bearing size, sealing arrangement and expected radial load before finalizing the idler set.

Selection Tip: For heavy-duty applications, also consider impact conditions, belt speed, material characteristics, environmental exposure and required service life before selecting the conveyor idler set.

Conveyor Idler Set Applications

Conveyor idler sets are used to support, guide and maintain the conveyor belt across a wide range of bulk material handling systems.

01

Mining & Mineral Handling

Used for transporting coal, iron ore, limestone, aggregates and other mined materials over long conveyor routes.

02

Cement & Construction

Supports conveyor belts handling limestone, clinker, crushed stone, sand and other construction materials.

03

Power Plants

Suitable for belt conveyors used in coal handling, ash handling and bulk fuel transportation systems.

04

Steel & Metal Plants

Used in material handling systems transporting ore, pellets, coke, slag and other heavy materials.

05

Ports & Bulk Terminals

Supports high-capacity conveyor systems used for loading and unloading bulk materials at ports and terminals.

06

Quarries & Aggregates

Designed for conveyor systems carrying gravel, crushed rock, sand and other abrasive aggregate materials.

Troubleshooting

A quick diagnostic path for common conveyor roller issues.
1

Roller Does Not Rotate Freely

Inspect the bearings for contamination, seizure, or excessive wear. Replace damaged bearings and check that the roller shaft is correctly aligned.

2

Excessive Roller Noise

Check bearings, seals, shaft alignment, and roller mounting. Replace worn bearings and damaged sealing components.

3

Roller Vibration During Operation

Inspect the roller for bending, imbalance, damaged bearings, or material buildup. Replace the defective roller and clean accumulated material.

4

Uneven Roller Rotation

Check for shaft misalignment, bearing damage, or deformation of the roller tube. Correct the mounting or replace the damaged component.

5

Belt Tracking Problems

Check the alignment and positioning of the complete idler set. Inspect carrying and return rollers for incorrect installation or buildup.

FAQ

A conveyor idler set is an assembly of rollers and supporting brackets used to support the conveyor belt and conveyed material during operation.

Depending on the configuration, an idler set can include conveyor brackets, conveyor roller sets, carrying rollers, return rollers, and impact rollers.

Carrying idlers support the loaded upper side of the conveyor belt, while return idlers support the empty belt on its return path.

Impact rollers are generally installed below conveyor loading and transfer points where falling material creates higher impact forces on the belt.

Selection should consider belt width, belt speed, material load, conveyor capacity, material characteristics, idler spacing, loading conditions, and conveyor arrangement.