Overview
ISO 5414-2:2002 defines the connecting dimensions and designation of tool chucks (end mill holders) with clamp screws for flatted cylindrical shank tools. It covers dimensional requirements for chucks that accept flatted shanks in accordance with ISO 3338-2 and specifies both the physical interface and the standardized naming convention for these holders. The standard addresses chucks for manual and automatic tool changers and chucks with Morse taper shanks.
Key topics and requirements
- Types of connection
- 7/24 taper shanks for manual changers (ISO 297) and automatic changers (ISO 7388-1). Supports tool shanks with single flat or double flat (single/double flats depending on changer type).
- Morse taper shanks (ISO 296, ISO 5413) for tool shanks with single flat only (positive drive except for some size exceptions noted).
- Connecting dimensions
- Detailed figures and tabulated dimensions for each configuration (single flat / double flat, manual / automatic changers). Tables specify clamping diameters, taper size, and gauge plane positions.
- Surface roughness and dimensional tolerancing (H5 fits and associated limits) are included where applicable.
- Designation system
- Standardized designation format identifies: standard reference (ISO 5414-2), changer type (A = manual, B = automatic, M = Morse), flat type (1 = single, 2 = double), taper size, clamping diameter (d), and clamp screw size.
- Examples in the standard:
Applications and users
- Who uses ISO 5414-2
- Toolholder and machine tool manufacturers specifying end mill holders and adapters.
- CNC machine builders and integrators who implement manual or automatic tool changers.
- Tooling engineers, procurement teams, and QA departments ensuring interchangeability and correct fit.
- Maintenance and workshop personnel replacing or inspecting holders and clamp screws.
- Practical value
- Ensures mechanical interchangeability between tool chucks and flatted cylindrical shank tools.
- Reduces tooling errors and downtime by standardizing interfaces for both manual and automatic tool changers.
- Supports accurate procurement and clear product designation for inventories.
Related standards
Keywords: ISO 5414-2, tool chucks, end mill holders, flatted cylindrical shank, 7/24 taper, Morse taper, automatic tool changer, connecting dimensions, designation.