Top roller
The top roller is a core supporting component of the belt conveyor, installed below the carrying section of the conveyor belt. It is used to support the weight of the material and the belt, reduce frictional resistance, and ensure the smooth operation of the belt. According to different structures and functions, it can be divided into types such as parallel rollers, trough rollers (35°, 45°), and buffer rollers.
- Product Description
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Product Introduction and Advantages
The idler roller is a core supporting component of the belt conveyor, installed below the carrying section of the conveyor belt. It is used to support the weight of the material and belt, reduce frictional resistance, and ensure smooth belt operation. According to different structures and functions, it can be divided into parallel idler rollers, trough idler rollers (35°, 45°), and buffer idler rollers.
1. Structural Features
Material:
Roller Body: Seamless steel pipe, wear-resistant composite material (such as HDPE), stainless steel (corrosion-resistant).
Bearing: Deep groove ball bearing, double sealed bearing (dustproof and waterproof).
Shaft: High-strength cold-drawn steel or alloy steel.
Surface Treatment: Galvanized, rubber-coated (anti-slip/noise reduction), ceramic coating (wear-resistant).
Installation Method: Fixed type, adjustable type (with angle adjustment).
2. Main Types and UsesType
Structure
Application Scenarios
Parallel Idler Roller
Single straight roller
Conveying piece goods (such as boxes, pallets)
Trough Idler Roller
3-5 rollers forming a trough shape (30°~45°)
Bulk material conveying (coal, ore, grain)
Buffer Idler Roller
Rubber ring or spring support
High drop areas (reduce material impact)
Transition Idler Roller
Conical or special arc design
Belt conveyor head and tail (prevent belt tearing)
Product Advantages
1. High-efficiency Support and Protection
Trough idler roller: Increases the contact area of the belt, improves the conveying capacity of bulk materials (increases by 20%~30% compared to flat idler rollers).
Buffer idler roller: Absorbs the impact force of materials, protects the belt and joints, and extends the service life.
2. Low Running Resistance
Precision bearings + lubrication design, rotational resistance ≤1N, reduces the driving power of the belt conveyor by 10%~15%.
Smooth surface or rubber coating reduces belt wear and noise (suitable for indoor or environmentally demanding scenarios).
3. Strong Environmental Adaptability
Corrosion-resistant type: Stainless steel or galvanized material, suitable for humid, acid-base environments (such as ports, chemical plants).
High-temperature resistant type: Ceramic bearings + special steel, used in metallurgy and cement industries (temperature resistance up to 200℃).
4. Long Life & Easy Maintenance
Sealing technology: Multi-lip seal + lithium-based grease lubrication, dustproof and waterproof, maintenance-free period up to 30,000 hours.
Modular design: Quick disassembly and assembly, single roller replacement without shutdown (saves 90% time compared to traditional welding).
5. Energy Saving and Environmental Protection
Lightweight design (such as composite material roller body) reduces rotational inertia and lowers energy consumption.
Some models support recycling and reuse (such as HDPE material).
Comparison with Traditional Idler RollersImprovement
Modern Upper Idler Roller
Traditional Idler Roller
Bearing Seal
Double labyrinth seal, zero leakage
Single layer seal, easy dust entry
Anti-deviation
Self-aligning design, automatically corrects belt deviation
Requires additional deviation correction device
Wear Resistance
Ceramic coating/rubber coating, lifespan increased by 3 times
Ordinary steel roller, easy to wear
Applicable Belt Width
Supports extra-wide belts (≥2m)
Usually limited to narrow belts (≤1.5m)
Selection Guide
1. Select according to material characteristics:
Sharp ore → Buffer idler roller or thickened steel pipe.
Sticky materials (such as clay) → Rubber-coated idler roller (anti-stick).
2. Select the trough angle according to the belt width:
Belt width ≤800mm → 30° trough.
Belt width ≥1200mm → 45° trough.
3. Special requirements:
Food grade → Stainless steel + FDA certified rubber coating.
Anti-static → Conductive carbon black rubber coating.
Industry Application Cases
Coal mining industry: 45° trough-type idler rollers + explosion-proof bearings, suitable for high humidity and high load underground.
Port terminal: Salt spray resistant galvanized idler rollers, resistant to seawater corrosion.
Food factory: Stainless steel idler rollers + white PU coating, meet hygiene standards.
For specific parameters (such as load, speed, installation spacing) or customized solutions, please provide detailed working conditions for further matching!
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