Carcass: Minimum Pulley Diameter 400-2000 mm

Component Specifications

Definition

The carcass is the foundational, multi-layered internal structure of a conveyor belt, responsible for bearing the entire tensile load during operation. It consists of one or more plies of fabric (typically polyester, nylon, or aramid) or steel cords embedded in a rubber matrix. This core layer determines the belt's longitudinal strength, flexibility, impact resistance, and troughability, forming the essential framework upon which the top and bottom covers are applied.

Working Principle

The carcass functions by distributing tensile forces evenly across its width and length. When the conveyor drive pulley applies force, the tension is transmitted through the carcass, pulling the belt and its load. Its layered or corded construction provides high strength-to-weight ratio, allowing it to withstand operational stresses like starting tension, load impact, and flexing over idlers without permanent deformation or failure.

Materials

Primary materials include polyester (EP) fabric for general use, nylon (NN) fabric for high impact resistance, aramid fibers for extreme strength and heat resistance, or steel cords for heavy-duty, long-distance applications. These are impregnated and bonded with rubber compounds (typically natural rubber, SBR, or neoprene) to form a cohesive, flexible ply.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Ply Rating	2-8 plies
Rip Resistance	N/mm
Tensile Strength	200-6000 N/mm
Impact Resistance	Measured in joules (J)
Elongation At Break	10-25%
Minimum Pulley Diameter	400-2000 mm

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

Standards

ISO 15236, ISO 283, DIN 22102

Parent Products

This component is used in the following industrial products

Industrial Conveyor Belt

An industrial conveyor belt is a durable, flexible loop of material designed to move items continuously along a production line or between processes.

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Heat-resistant Conveyor Belt

A specialized conveyor belt designed to withstand high temperatures while transporting hot materials.

View Product Details

Engineering Analysis

Risks & Mitigation

Ply separation (delamination)
Carcass rupture from over-tensioning
Edge damage leading to longitudinal tearing
Moisture ingress causing fabric rot (in fabric carcasses)
Corrosion of steel cords (in steel cord carcasses)

FMEA Triads

Trigger: Exceeding maximum recommended tension
Failure: Carcass rupture or permanent elongation
Mitigation: Install tension monitoring devices and ensure proper belt selection based on calculated working tension.

Trigger: Impact from sharp or heavy falling objects
Failure: Localized carcass damage, leading to ply separation or tearing
Mitigation: Use impact beds at loading zones and select belts with high impact-resistant carcass materials (e.g., nylon).

Trigger: Misalignment or material buildup
Failure: Edge wear and eventual longitudinal tearing of the carcass
Mitigation: Implement belt tracking systems, use crowned pulleys, and perform regular cleaning and alignment checks.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Ply alignment tolerance within ±5 mm over belt width; thickness variation within ±0.5 mm per ply as per ISO 283.

Test Method

Tensile strength tested per ISO 283 (fabric) or ISO 7623 (steel cords); adhesion between plies tested per ISO 252; full belt testing per DIN 22102 for fire resistance and mechanical properties.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Carcass

Manufacturer profiles associated with Carcass.

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Frequently Asked Questions

What is the difference between fabric carcass and steel cord carcass?

Fabric carcass uses multiple plies of synthetic fabric (e.g., polyester/nylon) for flexibility and general-duty use. Steel cord carcass uses parallel steel cables for superior tensile strength, minimal elongation, and long-distance, heavy-load applications like mining or bulk handling.

How does carcass design affect belt selection?

Carcass design (material, ply count, strength) determines the belt's load capacity, pulley diameter requirements, troughability, and resistance to impact/tear. It must be matched to conveyor tension, load weight, and operational environment to ensure durability and safety.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Carcass