China Spiral Return Roller for Belt Conveyor

Our Conveyor Spiral Return Roller (also known as a spiral return idler) is a special type of conveyor return roller designed to clean the conveyor belt and reduce material build-up on the return side. It is typically used in bulk material handling systems, such as in mining, quarrying, cement plants, or power stations, where belts carry dusty or sticky materials.

A conveyor spiral return roller consists of a standard return roller (which supports the underside of the conveyor belt on its return run) wrapped with spiral-shaped metal bars or rubber rings. These spiral elements rotate with the roller, effectively dislodging materials stuck to the belt and preventing carryback.

Structural Characteristics

1. Unique design: Composed of spiral idlers and a special bracket. The surface of the idler is spiral-shaped, different from the traditional straight cylindrical idler.

2. Sturdy and durable: Usually made of high-strength materials, it can withstand large pressures and impacts and adapt to various harsh working environments.

Main Functions

Self-Cleaning Action:

The spiral or helical pattern gently scrapes and flicks off materials like clay, wet coal, or fines from the belt surface without damaging the belt cover.

Prevents Belt Damage:

By keeping the return side clean, spiral return rollers help prevent belt misalignment, uneven wear, and premature damage caused by trapped materials.

Reduced Material Build-Up:

The spiral design helps shed material off the roller itself, preventing clogging or build-up that can occur on flat return rollers.

Noise and Vibration Reduction:

The flexible spiral configuration can absorb small shocks, reducing vibration and noise during operation.

Types of Spiral Return Rollers

Steel Spiral Return Rollers:

Made from welded steel rods, ideal for heavy-duty or abrasive materials.

Rubber Spiral Return Rollers:

Use rubber spirals for quieter operation and reduced wear on the belt.

Combination Rollers:

Combine steel core with rubber or polyurethane spirals for enhanced durability and belt protection.

Performance Characteristics

1. Efficient return transportation: The spiral-shaped idler can effectively push the return conveyor belt and improve the return transportation efficiency. Compared with traditional parallel idlers, spiral idlers can better prevent the conveyor belt from slipping and accumulating materials.

2. Self-cleaning function: The spiral-shaped design enables the idler to automatically remove residual materials on the conveyor belt during rotation, reducing material adhesion and accumulation and lowering maintenance costs.

3. Reduce wear: The contact method between the spiral idler and the conveyor belt is more reasonable, which can reduce the wear of the conveyor belt and extend the service life of the conveyor belt.

4. Stable operation: The structural design of the spiral idler set can ensure that the conveyor belt runs smoothly during the return process, reducing vibration and noise and improving the stability of the conveyor system.

Application Scope

1. Widely used: Applicable to various belt conveyor systems, especially in occasions that require efficient return transportation, such as long-distance transportation and large-capacity transportation.

2. Adaptation to complex working conditions: It can adapt to different working environments and material characteristics, such as wet and sticky materials. Under harsh working conditions, the spiral idler set can still maintain good performance.

 ● Mining and quarry conveyors

 ● Cement and aggregate handling systems

 ● Coal and power plant conveyors

 ● Fertilizer, grain, and bulk materials industries

Spiral Return Idlers for Belt Conveyor Maintenance

1. Convenient maintenance: The structure is relatively simple. Daily maintenance mainly includes checking the wear of the idler and the tightness of the bracket. The self-cleaning function of the spiral idler also reduces the maintenance workload.

2. High reliability: Due to its unique structure and performance characteristics, the spiral idler set has high reliability, reduces the probability of equipment failure, and improves the overall operating efficiency of the conveyor system.

1. Roller/idler introduction:

Our company specializes in R&D, developing and manufacturing of belt conveyors as well as various types of idlers/rollers, pulleys and roller brackets.

Rollers/idlers are important components of belt conveyors. Their function is to effectively support the conveyor belt and the materials carried on the conveyor belt, ensuring the normal operation of the conveyor. The diameters of idlers have domestic standards and foreign standards.

Domestic standards:Φ63、Φ76、Φ89、Φ108、Φ133、Φ159、Φ194、Φ219;

Foreign standards: Φ 89、Φ102、Φ114、Φ 127、Φ 139、Φ152、Φ 165、Φ 178 and other specifications.

2. Our available rollers/idlers:

Carrier roller/bearing roller/carrying roller/spiral roller/friction roller/impact roller/rubber impact roller/buffer idler/trough roller/grooved roller/troughing roller set/comb roller/return roller/self-aligning roller/self-cleaning roller/carrier self-aligning roller/return self-aligning roller/edge roller/friction roller/carrier friction roller/return friction roller/roller set/roller bracket/impact roller set/carrier taper self-aligning roller/return taper self-aligning roller/parallel roller/Belt Conveyor Roller /Conveyor Idler/troughing idler

3. Roller/idler material specification:

Shaft: 45# STEEL.Cold-drawn steel S235JRG2 (EN10027-1); ST37 (DIN17100); E24 (AFNOR NFA 35501).

Tube: Q235.DIN2394 standard, the material is ST37 conforming to DIN 17100 standard.

Bearing housing: Cold stamping processing conforms to ISO M7 precision, cold rolling and calibration. The raw material conforms to DIN1623-1624 standard.

Inner sealing ring: NYLON6 (ISO Pa6).

Bearing: Deep groove ball bearing (clearance class C3) of DIN 6263 series. Labyrinth seal: 3-groove type, material ISO PA6 (nylon 6).

Cover: Cold impacted by deep-drawn steel EU 10111-DD13.

Outer sealing ring: Rubber sliding V-ring,wear-resistant, low-friction, ozone-resistant NBR nitrile butadiene rubber.

Protective cover: Mechanical protective bushing to prevent stone impacts. The material is POM polymer or anti-corrosive zinc, aluminum, and copper alloys. Lubricating grease: Water-proof and dust-proof NLGI grade 2 or 3 lithium-based grease is used during assembly for long-term lubrication.

Roller protection: Various types of painting, plastic spraying, galvanizing, and anti-rust tectyl oil.

Parameters:

A Conveyor Spiral Return Roller is a self-cleaning return idler that uses spiral or helical bars to keep the conveyor belt clean and prevent material carryback—essential for maintaining smooth, efficient, and long-lasting conveyor operation.