Overview
ISO 5414-1:2002 specifies the dimensional requirements and clamp-screw specifications for tool chucks (end mill holders) that drive flatted cylindrical shank tools. The standard defines the driving system geometry and gives the maximum chuck-nose diameter. It is a third-edition ISO publication intended to ensure mechanical compatibility, secure clamping and reliable drive transmission for milling tools produced to ISO 3338-2.
Key Topics
- Scope and purpose: Lays down dimensions of end mill holders with clamp screws designed to engage flatted cylindrical shanks and specifies the clamp screws used.
- Drive types: Distinguishes two drive categories:
- Chucks with bores ≤ 20 mm for tools with a single flat (tools may have a single or double cutting part).
- Chucks with bores ≥ 25 mm for tools with a double flat (tools provided with a single cutting part only).
- Clamp screws: Specifies requirements for clamp-screw form and engagement appropriate to the chuck bore and shank type. The standard includes tables and figures for nominal screw lengths and guidance on engagement for various bore sizes.
- Reference coordination: Normative reference to ISO 3338-2 (dimensional characteristics of flatted cylindrical shanks) and linkage to ISO 5414-2 for connecting dimensions and designation.
- Edition updates: The 2002 edition replaced the 1985 edition and incorporated additional shank diameters (for example, 14 mm and 18 mm) and related dimensional updates.
Applications
ISO 5414-1 is directly applicable to manufacturers, tool designers, procurement specialists and maintenance teams who require:
- Interchangeability between end mill holders and flatted shank milling cutters produced to ISO dimensions.
- Secure clamping and drive transmission for milling operations where axial and torsional loads demand consistent engagement between the chuck and shank.
- Specification and procurement guidance for clamp screws and holder noses, ensuring components conform to internationally accepted dimensions.
Typical use cases include production machining, tooling catalogs, quality control for tool-holding components, and engineering drawings that reference standardized drive interfaces.
Related Standards
- ISO 3338-2 - Cylindrical shanks for milling cutters: dimensional characteristics of flatted cylindrical shanks (normative reference).
- ISO 5414-2 - Tool chucks (end mill holders) with clamp screws: connecting dimensions of chucks and designation (complements Part 1).
By aligning tool holders and cutters to ISO 5414-1:2002, manufacturers and users improve compatibility, reduce tooling errors, and simplify inventory management across mills and tooling systems.