ISO 7755-12:2013

Overview

ISO 7755-12:2013 is an international standard developed by the International Organization for Standardization (ISO) that specifies the main dimensions of hardmetal burrs with an inverted cone shape, designated as style N. As part 12 of the broader ISO 7755 series, this standard focuses exclusively on the cutting part dimensions of these specialized rotary cutting tools made from hardmetal materials. These burrs are widely used in precision machining, deburring, and finishing applications involving hard materials.

This edition, released in 2013, updates the original 1984 version with minor revisions and aligns with general specifications detailed in ISO 7755-1. ISO 7755-12:2013 ensures consistent quality and interchangeability for inverted cone burrs, supporting manufacturers and users in selecting the correct tool dimensions for their machining needs.

Key Topics

• Scope and Application
  The standard defines the key dimensions of the cutting part of inverted cone-shaped hardmetal burrs (style N). It supplements general tool parameters such as helix direction, cut direction, and shank dimensions covered in ISO 7755-1.

• Dimensional Specifications
  It details diameter and length measurements of the cutting part at different cone angles (10°, 20°, 30°). For example, burr diameters range from 3 mm to 16 mm, with corresponding cutting length specifications.

• Relation to Other Standards
  ISO 7755-12 includes an informative annex linking its designations to ISO 13399, which covers the representation and exchange of cutting tool data. This facilitates standardized communication and data integration in CAD/CAM systems.

• Standardized Symbol N
  The document formalizes the use of the "N" symbol to identify inverted cone burrs within manufacturing and procurement settings.

• Compatibility with General Specifications
  The standard refers to ISO 7755-1 for tolerances on cutting diameters, helix and cut directions, and shank sizes, promoting uniformity across the ISO 7755 burr family.

Applications

• Precision Machining
  Hardmetal inverted cone burrs are ideal for shaping, enlarging holes, and deburring in metalworking industries requiring high precision.

• Manufacturing of Hard Materials
  These burrs are designed for effective cutting and finishing of hard metals, ceramics, and other tough materials where durability and accuracy are critical.

• Aerospace and Automotive
  Commonly used in aerospace and automotive component manufacturing where intricate shapes and tight tolerances are required.

• Tooling and Die-Making
  Facilitates detailed cutting and surface finishing in the production and maintenance of tools, dies, and molds.

• Integration into CAD/CAM Workflows
  The standard’s alignment with ISO 13399 assists in digital tool management, enabling better tool selection and process planning in automated environments.

Related Standards

• ISO 7755 Series
  This part is one of several in the ISO 7755 series covering various shapes of hardmetal burrs:

  • Part 1: General specifications
  • Part 2: Cylindrical burrs (style A)
  • Part 3: Cylindrical burrs with rounded tip (style C)
  • Part 4: Spherical burrs (style D)
  • ... and others up to Part 11.

• ISO 13399
  Provides guidelines on standardized representation and data exchange for cutting tools including hardmetal burrs, improving interoperability between software and professional systems.

• ISO/IEC Directives
  Governing guidelines for the drafting and updating of ISO standards, ensuring consistent development practices.

Summary

ISO 7755-12:2013 is essential for manufacturers, engineers, and purchasers involved with inverted cone hardmetal burrs. By standardizing the main cutting dimensions and linking with complementary ISO standards, it enhances quality control, tool interoperability, and process optimization in cutting operations. This standard thus supports advanced machining applications that demand precision, durability, and effective data management in tooling systems.