ZOOMRY
1. Product Overview
ZOOMRY steel spiral return rollers are self-cleaning return side components designed to help eliminate material buildup — particularly in the center of the return belt where sticky carryback tends to concentrate. When material adheres to a standard return roller, it creates an irregular surface that can affect belt tracking. These spiral return rollers use a welded steel helix that directs carryback toward the roller edges during rotation. Ideal for coal, clay, wet ash, and sticky mineral applications.
The steel spiral return roller is positioned on the return side of the conveyor, providing distributed belt support while directing carryback toward the roller edges. Unlike the rubber disc return roller which uses alternating discs, the spiral design uses a continuous welded steel helix. In suitable applications, it can reduce reliance on manual cleaning and supplemental carryback-control measures — though final effectiveness depends on material characteristics and operating conditions.
2. How Steel Spiral Self-Cleaning Works
On the return side of a belt conveyor, fine particles and moisture migrate to the roller surface through belt edge gaps and splice points. For sticky materials such as coal, clay, and wet ash, each revolution can deposit a layer of carryback onto the roller surface. Over time, this buildup is often concentrated in the center of the belt — the area with highest belt-to-roller contact pressure.
The steel spiral return roller addresses this with a welded steel helix on the roller shell. As the roller rotates, the helix pushes accumulated material laterally toward the roller edges where it falls clear of the belt. This action helps maintain a more consistent roller profile — reducing the risk of tracking issues caused by uneven roller diameter. For extremely sticky or high-moisture materials, supplemental belt cleaning may still be required depending on site conditions.
3. Key Features
Continuous Welded Steel Helix — Spiral profile directs sticky carryback toward the roller edges during rotation, helping maintain a more consistent roller diameter in coal and clay applications.
Self-Cleaning Action — The spiral geometry helps limit continuous carryback buildup compared with a smooth steel roller shell, reducing the frequency of manual cleaning in suitable applications.
Passive Operation — The helix works continuously as the conveyor operates — no external power or control system required for the self-cleaning action.
Advanced Labyrinth Sealing — Multi-stage nylon labyrinth seals protect bearings from dust and moisture ingress in dusty return side environments.
Reduced-Cleaning Design — Self-cleaning action reduces the need for periodic roller cleaning, subject to the site maintenance plan and material conditions.
4. Steel Spiral vs Rubber Disc vs Standard Return Roller
| Feature | Steel Spiral Return Roller | Rubber Disc Return Roller | Standard Steel Return Roller |
|---|---|---|---|
| Roller Surface | Continuous welded steel helix | Alternating rubber discs | Smooth steel shell |
| Self-Cleaning Mechanism | Helix directs material to roller edges | Discs shed material through gaps | None — manual cleaning required |
| Belt Support | Distributed along helix profile | Multiple contact points with gaps | Continuous smooth surface |
| Best For | Sticky center buildup, wet materials | Sticky materials with flutter concerns | Dry, clean return belts |
5. Production Specifications
ZOOMRY steel spiral return rollers are manufactured in five standard roller diameters with multiple bearing options. The spiral and rubber-disc designs share selected base roller configurations; final availability depends on the selected surface design. The following matrix shows standard production configurations by roller length:
| Roller Diameter | Bearing | Available Length (mm) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
750 | 950 | 1150 | 1400 | 1600 | 1800 | 2000 | 2200 | 2500 | 2800 | 3000 | 3150 | 3350 |
| 89mm | 6204 | ✓ | ✓ | ✓ | — | — | — | — | — | — | — | — | — | — |
| 6205 | ✓ | ✓ | ✓ | — | — | — | — | — | — | — | — | — | — | |
| 108mm | 6204 | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | — | — | — | — | — | — |
| 6205 | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | — | — | — | — | — | — | |
| 6305 | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | — | — | — | — | — | — | |
| 6306 | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | — | — | — | — | — | — | |
| 133mm | 6205 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | — | — | — | — |
| 6305 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | — | — | |
| 6306 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | — | — | |
| 159mm | 6305 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | — | — |
| 6306 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | |
| 6307 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | |
| 6308 | — | — | — | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | — | |
| 194mm | 6307 | — | — | — | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 6308 | — | — | — | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 6309 | — | — | — | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
Available configurations for ZOOMRY steel spiral return rollers. Lengths and bearing combinations shown are standard production options shared with selected rubber-disc roller configurations. Final availability depends on the selected surface design. Custom lengths and bearing arrangements may be available — contact ZOOMRY engineering for project-specific requirements.
What Information Do We Need for Spiral Return Roller Selection?
- Belt width, conveyor length, and belt speed
- Material type, moisture content, and carryback location (center vs full width)
- Current return roller condition — buildup severity and cleaning frequency
- Operating environment — dust levels, temperature range, and moisture exposure
- Existing roller diameter, bearing size, and mounting dimensions for retrofit compatibility
Related Solutions
Need Self-Cleaning Return Rollers for Sticky Material?
Tell us your material type, belt width, and current return roller buildup issues — our engineers will recommend the optimal spiral, rubber disc, or standard return roller configuration.
Request Return Roller Recommendation →
