Idlers/Rollers for Slag Conveyor Systems | Specifications & Standards

Product Specifications

Technical details and manufacturing context for Idlers/Rollers

Definition

Idlers/Rollers are cylindrical rotating components installed along the length of a slag conveyor system. They provide continuous support to the conveyor belt, reducing friction and wear while maintaining proper belt alignment and tension. In slag conveyor applications, these components must withstand high temperatures, abrasive slag materials, and heavy loads while ensuring smooth material transport from furnaces or processing units to disposal or recycling areas. The rollers are typically made from carbon steel, alloy steel, or heat-resistant steel, depending on the specific thermal and mechanical demands of the application. Key parameters include roller diameter (89–219 mm) and length (200–2000 mm) to match belt widths of 500–1600 mm, with belt speeds ranging from 1.0 to 4.0 m/s. Load capacity per roller is 5–50 kN, and radial runout is held to 0.5–1.0 mm for high-speed operation. Shaft diameters range from 20 to 50 mm, and bearing life (L10h) is specified at 30,000–60,000 hours. Operating temperature is limited to -20 to 80°C, beyond which seals and grease degrade. Sealing ratings from IP54 to IP66 are available for dusty or wet slag handling. Surface hardness of 40–50 HRC provides wear resistance against abrasive slag. Wall thickness of the steel tube is 4–10 mm, and total weight ranges from 10 to 150 kg. These values are reference ranges per ISO 1537, ISO 5048, ISO 281, IEC 60529, and ISO 6508; actual specifications must be confirmed with the manufacturer for the specific conveyor design and operating conditions.

Working Principle

Idlers/Rollers rotate on bearings as the conveyor belt moves over them, converting sliding friction into rolling friction. This reduces energy consumption and belt wear. They maintain the belt's trough shape for efficient material containment and provide consistent support along the conveyor's length, preventing belt sag and ensuring stable slag transport. The rollers are spaced at intervals to support the loaded belt and return strand, with the troughing angle typically 20–45 degrees (not specified in source facts). The bearings are sealed to protect against dust and moisture, and the roller shell is hardened to resist abrasive wear. Proper alignment and tension are maintained by the idler frames and the belt's tracking, which is influenced by the roller's radial runout and shaft straightness. The working principle relies on the balance between the belt's tension and the roller's rotational resistance, which is minimized by using high-quality bearings and proper lubrication. In slag handling, the rollers must also dissipate heat effectively to prevent overheating of the bearings and seals.

Common Materials

Carbon Steel, Alloy Steel, Heat-resistant Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Roller Diameter	89–219 mm	Standard sizes for belt widths 500–1600 mmISO 1537
Roller Length	200–2000 mm	Match belt width and idler spacingISO 1537
Belt Speed	1.0–4.0 m/s	Higher speeds require balanced rollersISO 5048
Load Capacity	5–50 kN	Dynamic radial load per rollerISO 1537
Radial Runout	0.5–1.0 mm	Tighter tolerance for high-speed beltsISO 1537
Shaft Diameter	20–50 mm	Determines bearing size and load ratingISO 1537
Bearing Life	30000–60000 h	L10h at rated loadISO 281
Operating Temperature	-20–80 °C	Outside range, seals and grease degrade
Surface Hardness	HRC 40–50	Wear resistance for abrasive slagISO 6508
Wall Thickness	4–10 mm	Steel tube; thicker for heavy loads
Weight	10–150 kg	Depends on size and material

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Roller Barrel Part
Main cylindrical body that contacts and supports the conveyor belt

Material: Steel
Shaft Part
Central axle that transfers rotational force and supports the barrel

Material: Alloy Steel
Bearings
Reduce friction between shaft and barrel, enabling smooth rotation

Material: Steel with lubricant
Seals Part
Protect bearings from slag dust, moisture, and contaminants

Material: Rubber or Polymer
End Caps Part
Secure bearings and provide mounting points for brackets

Material: Steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Slag Conveyor

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Conveyor Systems

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Manufacturers of Idlers/Rollers

Manufacturer profiles associated with Idlers/Rollers.

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Frequently Asked Questions

What materials are idlers/rollers made of?

According to the directory, idlers/rollers are available in carbon steel, alloy steel, and heat-resistant steel. The choice depends on the operating temperature and mechanical loads in the slag handling system.

What are the typical dimensions and load capacities?

Reference ranges include roller diameters of 89–219 mm, lengths of 200–2000 mm, and load capacities of 5–50 kN. These values are based on ISO 1537 and must be confirmed for the specific belt width and application.

What standards apply to idlers/rollers?

Relevant standards include ISO 1537 for dimensions and load, ISO 5048 for belt speed, ISO 281 for bearing life, IEC 60529 for sealing, and ISO 6508 for hardness. These are procurement references, not certifications.

How do I select the right idler/roller for my slag conveyor?

Selection requires matching roller diameter and length to belt width, considering belt speed, load capacity, operating temperature, and environmental conditions. Always verify model-specific values with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Max 2 bar (29 psi) radial load
other spec:	Slurry concentration up to 60% solids by weight, belt speed up to 5 m/s
temperature:	-20°C to 120°C

Idlers/Rollers

Product Specifications

Applied To / Applications

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Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards