Overview
SIST ISO 2790:2012 outlines standardized requirements for V-belts and corresponding pulleys used in belt drive systems for the automotive sector, specifically for driving auxiliary components of internal combustion engines. Originating from ISO 2790:2004, this standard is essential for automotive engineers, manufacturers, and suppliers aiming to achieve interoperability, reliability, and quality across V-belt drivetrain components.
Key Topics
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Scope and Purpose
Defines the applicability to V-belt drives for auxiliary systems in vehicles with internal combustion engines.
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Terminology and Symbols
Uses established definitions and symbols in accordance with ISO 1081 for consistency across belt drive standards.
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Belt Classification
- Cross-sections: AV 10, AV 13, and AV 17
- Nominal top widths and pitch zones
- Measurement procedures for effective belt length and ride-out
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Pulley Specifications
- Dimensional requirements for service pulleys, including groove profiles, groove angles, and diameters
- Details on multigrooved pulleys supporting multiple belts or joined belt sets
- Tolerance guidelines for axial and radial run-out to ensure proper pulley-belt interaction
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Measurement and Verification
Tested using specified apparatus to determine belt length, ride-out, and variations in centre distance according to ISO 8370-1 and ISO 9608.
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Designation System
Standardized format for identifying pulleys by effective diameter, number of grooves, and groove profile (e.g., 67×1AV10).
Applications
This standard is widely used in the automotive industry for design, manufacturing, quality assurance, and procurement processes involving V-belt driven auxiliary systems. Common automotive applications include:
- Alternators
- Water pumps
- Air conditioning compressors
- Power steering pumps
- Fan drives
By adhering to SIST ISO 2790:2012, organizations ensure:
- Interchangeability: Components from different manufacturers fit and operate seamlessly.
- Performance Reliability: Standardized dimensions reduce the risk of premature wear or failure.
- Simplified Maintenance: Spare parts selection and replacement processes are streamlined.
- Cost Efficiency: Reduces the need for custom specifications and minimizes inventory complexity.
Related Standards
For comprehensive implementation and understanding, refer to these associated standards:
- ISO 1081: Vocabulary for V-belts and V-ribbed belts, and their corresponding grooved pulleys.
- ISO 8370-1: Test methods for the dynamic determination of pitch zone location in V-belts.
- ISO 9608: Test methods for verifying uniformity and determining centre distance variation in V-belts.
These documents provide additional information on definitions, test methods, and broader guidelines governing belt drive systems in automotive and industrial contexts.
By following SIST ISO 2790:2012, automotive manufacturers and suppliers ensure the precision, interoperability, and durability of V-belt drive systems, leading to improved vehicle performance and reduced costs related to maintenance and spares management. Adherence to such international standards not only enhances product quality but also strengthens competitiveness in global automotive markets.
