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