ISO 5419:1982

Overview

ISO 5419:1982 - "Twist drills - Terms, definitions and types" is an international vocabulary standard that defines the geometrical elements and common types of twist drills. First published in December 1982, the document provides rigorous, internationally harmonized drill terminology and geometrical definitions (axis, shank, body, flutes, land, web, chisel edge, lips, faces, clearances, lengths, etc.). It is intended as a reference dictionary to remove ambiguity in technical communication and specification of cutting tools and twist drills.

Key Topics

• Scope and purpose: Standardized terms and definitions for twist drills and their geometrical features; based on the tool-in-hand system (ISO 3002/1).
• Drill types and shanks: Terms for shank forms shown in the standard (taper shank, parallel shank, tenon/tang drives).
• Geometrical definitions: Precise definitions of drill parts including axis, shank, body, flutes, land, web and web thickness, chisel edge, major cutting edge (lip), face, flank, heel, outer corner, flute length and overall length.
• Measurement references: How to measure dimensions such as flute length, chisel edge length and depth of body clearance.
• Multilingual vocabulary: Terms given in the three official ISO languages (English, French, Russian) with equivalent wording in German, Italian and Dutch; official ISO definitions are those in the three ISO languages.
• Reference framework: The standard is purposely concise and rigorous - intended as a dictionary rather than a teaching guide.

Applications

Who uses ISO 5419 and why:

• Design engineers and toolmakers: For consistent naming and dimensioning in drill design and technical drawings.
• Manufacturers and suppliers: To align product descriptions, catalogs and quality documents for international trade.
• Procurement and quality assurance: For clear specifications and acceptance criteria when ordering twist drills.
• CAD/CAM and tooling libraries: To ensure correct geometry labeling and parameter mapping for machining simulations.
• Technical translators and standards developers: To preserve precise meaning across languages in documentation and standards work.

Practical benefits include reduced misinterpretation in specifications, improved interoperability between designers and manufacturers, and clearer communication in international projects involving cutting tools and drills.

Related Standards

Relevant ISO documents cited in ISO 5419:

• ISO 3002/1 (tool-in-hand system - geometry of cutting tools)
• ISO 235, ISO 494 (parallel and Morse shank drills)
• ISO 866, ISO 2546, ISO 2541 (centre drills)
• ISO 3291, ISO 3292, ISO 3314, ISO 3438, ISO 3439, ISO 7079 (various drill series and special types)

Keywords: ISO 5419, twist drills, drill terminology, drill geometry, cutting tools, shank types, flutes, chisel edge, standards.