ISO 6531:2017

Overview

ISO 6531:2017 is an international standard published by the International Organization for Standardization (ISO) that focuses on terminology related to portable chain-saws used in forestry machinery. This standard provides a comprehensive vocabulary covering mechanical aspects of portable chain-saws, including components such as saw chains and guide bars. Additionally, it defines various functions, safety devices, and operational terms essential for professionals working with chain-saws in forestry applications.

The fourth edition of ISO 6531, released in 2017, updates and expands the definitions provided in earlier versions to improve clarity and address new technical developments in portable chain-saw machinery.

Key Topics

• Mechanical Terms: Defines the parts of a portable chain-saw including the chain, guide bar, sprocket, drive links, and cutting components.
• Work Functions:
  • Abattage (felling): Cutting standing trees at the base.
  • Ébranchage (limbing): Removing branches from felled trees.
  • Tronçonnage (bucking): Cutting felled or uprooted trees into manageable lengths.
  • Fendage (splitting): Dividing wood longitudinally.
  • Mortaisage (mortising): Cutting holes using the chain saw nose.
• Types of Portable Chain-Saws:
  • General forest chain-saws for felling, limbing, and bucking.
  • Pruning chain-saws designed for trimming upper tree parts by qualified operators.
• Safety Devices:
  • Chain brake (manual and automatic) to stop or lock the chain during dangerous rebound situations.
  • Handguards for protecting the operator’s hands.
  • Chain catcher and chain tensioner for secure operation.
  • On/off switch and throttle lock to control the power source and prevent accidental acceleration.
• Adjustment Systems:
  • Chain tensioner for adjusting chain tightness.
  • Starter mechanisms including manual and electric starters.
  • Carburetor controls for managing fuel-air mixture and engine idle speed.
• Chain-Saw Positions (Annex A):
  • Detailed positional descriptions and illustrations for safe and accurate saw operation, including nose-up, nose-down, and side positions.

Applications

ISO 6531:2017 is invaluable for forestry professionals, equipment manufacturers, maintenance technicians, and safety officers involved with portable chain-saws. The standardized vocabulary provides:

• Clear communication among manufacturers and users about chain-saw parts and functions.
• Enhanced safety by defining terms related to chain brake operation, rebound, and protective devices.
• Support for training and certification programs to improve operator knowledge and reduce accidents.
• Foundation for further technical standards on chain-saw performance, testing, and safety requirements.

This vocabulary standard aids in aligning terminology across nations, facilitating international trade, compliance, and interoperability of forestry machinery.

Related Standards

Professionals working with ISO 6531:2017 may also consult these related ISO and IEC standards for comprehensive guidance:

• ISO 7293 - Portable Chain Saws - Power Test Methods: Establishes power test procedures relevant to engine performance metrics referenced in ISO 6531.
• ISO/IEC Directives, Part 2 - Rules for drafting International Standards: Guides the consistent development of standards vocabularies and definitions.
• IEC Electropedia - International Electrotechnical Vocabulary: Useful for electrical components of chain-saws such as starters and ignition systems.
• ISO 11148 series - Hand-held Non-electric Power Tools: Safety requirements applicable to chain-saw attachments and safe usage.

By adhering to the terminology and definitions outlined in ISO 6531:2017, stakeholders ensure precise understanding, consistent documentation, improved safety compliance, and facilitate innovation within the portable chain-saw forestry sector.