ISO 1641-1:2016

Overview

ISO 1641-1:2016 - "End mills and slot drills - Part 1: Milling cutters with cylindrical shanks" defines the general dimensions and dimensional series for milling cutters with plain cylindrical, flatted cylindrical and threaded shanks. It covers end mills (flat‑ended and ball‑nosed) in standard and long series, and slot drills in short and standard series. The standard references ISO 3338 (Parts 1–3) for cylindrical shank characteristics and excludes solid hard‑metal end mills and slot drills.

Key topics and requirements

• Dimensional series and geometry: Specifies recommended series based on cutting length, shank diameter and overall length. Dimensions are presented in tables and figure(s) (Table 1, Table 2, Figure 1).
• Shank types: Applies to plain cylindrical, flatted cylindrical and threaded shanks; shank tolerances follow ISO 3338‑1, ISO 3338‑2 and ISO 3338‑3.
• Tolerances on cutting diameter: Requires js14 tolerance for end mills and e8 tolerance for slot drills.
• Special notes: For double‑ended end mills with cutting diameter nominally equal to shank diameter, the maximum cutting diameter is specified to be slightly smaller than the minimum shank diameter.
• Data mapping: Annex A provides relationships between ISO 1641‑1 designations and ISO 13399 preferred symbols for cutting tool data exchange.

Applications and who uses it

ISO 1641-1 is used by:

• Tool manufacturers to design, specify and label end mills and slot drills with cylindrical shanks.
• Procurement and supply chain teams to verify product conformity and ensure interchangeability.
• CNC programmers and tooling engineers for tool selection and cutter libraries in CAM systems.
• Quality inspectors and metrology labs to check compliance with dimensional series and tolerances.
• CAD/CAM and tooling data managers who map tool metadata to ISO 13399 for digital tool data exchange.

Practical applications include specifying cutter dimensions for part programs, ensuring mechanical compatibility with toolholders, standardizing tooling inventories, and supporting accurate tool presetting and machine setup.

Related standards

• ISO 3338‑1, ISO 3338‑2, ISO 3338‑3 - Cylindrical shanks for milling cutters (dimensional characteristics)
• ISO 1641‑2 - Milling cutters with Morse taper shanks
• ISO 1641‑3 - Milling cutters with 7/24 taper shanks
• ISO 13399 - Cutting tool data representation and exchange
• ISO 11529 - Milling cutters - Designation (shank types and bore types)

Keywords: ISO 1641-1, end mills, slot drills, cylindrical shanks, milling cutters, dimensions, tolerances, ISO 3338, ISO 13399, tooling standards.