ISO 234-2:1982

Overview

ISO 234-2:1982 is an international standard published by the International Organization for Standardization (ISO) that specifies the characteristics of cut for files and rasps. This standard complements ISO 234-1, which covers dimensions, by defining key parameters such as cutting angles, coarseness of cut, and the number of teeth for various types of files and rasps. Established by ISO Technical Committee ISO/TC 29 on Small Tools, this standard aims to unify terminology and technical specifications used in the trade worldwide, enhancing compatibility and quality assurance in tool manufacturing and usage.

Key Topics

• Coarseness of Cut
  Defines the number of teeth per centimetre for files and per square centimetre for rasps, including tolerance levels. Coarseness categories such as bastard, second cut, smooth, coarse, medium, and fine cuts are detailed for various tool types.

• Cutting Angle
  Specifies the angle between the principal cut and the file centerline. For example, engineer’s files typically have a cutting angle of 60° ±5°, while the cutting angles on rasp edges may differ.

• File Types Covered

  • Engineer’s files (double cut): hand, flat, half-round, round, square, three-square
  • Mill files (single cut): flat, half-round, round, cabinet
  • Taper saw files (single cut): triangular section files
  • Wood rasps: taper or blunt, flat section with square or round edges or one round edge

• Measurement Methods
  Details the method of tooth counting for files (principal cut teeth counted along the centreline) and rasps (teeth per square centimetre on the non-tapered part).

• Tolerances
  Outlines standard tolerances on the cut for different tool types, ensuring consistency in manufacturing.

Applications

ISO 234-2:1982 is essential for manufacturers, quality control engineers, and users of hand tools such as files and rasps. It helps:

• Ensure uniform quality of files and rasps across suppliers and international markets
• Define clear specifications for designing and producing files and rasps with specific cutting performances
• Guide tool selection based on cut coarseness and application requirements in metalworking, woodworking, and maintenance tasks
• Facilitate compatibility in tooling components by standardizing key parameters such as cutting angle and teeth count

This standard supports industries such as mechanical engineering, metal fabrication, woodworking, and maintenance services, improving efficiency and tool life.

Related Standards

• ISO 234-1: Files and Rasps - Dimensions
  Provides dimensional specifications that complement the cutting characteristics defined in ISO 234-2.

• ISO 234-7 (Draft Stage): Files and Rasps - Additional parts detailing further dimensions and properties.

By referencing ISO 234-2 in conjunction with related ISO parts, users gain a comprehensive framework for specifying and verifying file and rasp tools used in diverse industrial and craft applications.

Keywords: ISO 234-2, files and rasps, cut characteristics, cutting angle, coarseness of cut, hand tools, files, rasps, tool standards, technical specifications, cut tolerance, manufacturer guidelines, woodworking tools, metalworking files