Overview
ISO 7755-4:2013 - Hardmetal burrs - Part 4: Spherical burrs (style D) specifies the main dimensions of the cutting part for hardmetal (carbide) burrs of spherical shape. This part of the ISO 7755 series defines geometric sizes of the cutting head and provides a clear reference for manufacturers, purchasers and users who need standardized dimensions for hardmetal burrs, ensuring interchangeability and consistent product descriptions.
Key topics and technical requirements
- Scope: Defines the main cutting-part dimensions for spherical (symbol D) hardmetal burrs. It applies to the cutting head geometry; shank and tolerance details are referenced to ISO 7755-1.
- Dimension table: Provides nominal diameters (d) and corresponding cutting-edge lengths (l). Values use the relation l = 0.9·d. Examples from the standard:
- d = 2 mm → l = 1.8 mm
- d = 3 mm → l = 2.7 mm
- d = 4 mm → l = 3.6 mm
- d = 6 mm → l = 5.4 mm
- d = 8 mm → l = 7.2 mm
- d = 10 mm → l = 9.0 mm
- d = 12 mm → l = 10.8 mm
- d = 16 mm → l = 14.4 mm
- Referenced requirements: Tolerances on cutting diameter, helix/cutting direction, and shank diameter and length are not repeated here but are specified in ISO 7755-1 (General specifications).
- Data mapping: Annex A provides a relation between ISO 7755-4 designations and data properties in ISO 13399 (tool data representation), mapping d → DC (cutting diameter) and l → L (length of cutting edge).
Applications and users
- Tool manufacturers: design, produce and label spherical hardmetal burrs to consistent dimensions for quality control and cataloguing.
- Procurement and specification writers: reference ISO 7755-4:2013 in purchase orders to ensure correct part interchangeability.
- Quality engineers and inspectors: verify cutting-part geometry against standardized dimensions.
- CAM programmers and tooling engineers: select correct burr sizes for deburring, shaping and finishing operations in metalworking.
- Data managers and software vendors: integrate ISO 13399 mapping for digital tool libraries and ERP/CAD/CAM systems.
Related standards
- ISO 7755-1 - General specifications for hardmetal burrs (tolerances, shanks, designation).
- ISO 13399 - Representation and exchange of cutting tool data (mapping of properties).
- ISO 7755 other parts (A–N) - defines shapes such as cylindrical, conical, oval, flame, etc., for the wider hardmetal burr family.
Using ISO 7755-4:2013 in procurement, manufacturing and tooling databases helps ensure consistent communication, product interchangeability and accurate digital representation of hardmetal spherical burrs (style D).