Overview
ISO 1684:1975 - "Wire, bar and tube drawing dies - Specifications" defines the main dimensional and identification requirements for a range of drawing dies used in metal forming. The standard provides a codified short designation for dies, rules for marking, and tables of main pellet, case and bearing/bore dimensions for wire, bar, tube and shaped dies. Where the standard does not specify details, those are left to manufacturers or to national standards. Annex A compares bearing and bore dimensions for die types; Annex B gives multilingual terminology for die elements.
Key topics
- Scope and purpose: Standardizes main dimensions and designation/marking conventions for drawing dies used with steel and non‑ferrous metals.
- Codified designation: A short ISO designation sequence that includes:
- reference letter for application (A–F, L, N, R, S),
- case shape code (cylindrical Z or tapered K),
- pellet diameter (d2), case diameter (d3), bearing or bore size (d1 or a×b), and drawing angle or toric radius.
- Examples from the standard: AZ 14/28/3.5/16 ISO, DK 25/75/9/99/R ISO, NZ 45/100/15 X 15/20 ISO.
- Marking rules:
- Entry side: manufacturer trademark, short designation, bearing/bore dimensions.
- Exit side: the mark “ISO” and pellet diameter.
- Dimensional tables: Detailed dimension ranges for:
- wire drawing dies (steel A, non‑ferrous B),
- bar drawing dies (steel C, non‑ferrous D),
- tube drawing dies (steel E, non‑ferrous F),
- shaped dies and hexagon bars (L, N, R, S).
- Technical parameters: pellet (hard‑metal) diameter, case diameter, bearing/bore size, drawing angle (or toric radius for special profiles), tolerances and recommended limits depending on material tensile strength and draw angle.
- Notes on use: Inch conversions permitted; some diameter limits beyond the scope are called out; details like tolerances and special profiles may be specified by users or manufacturers.
Applications
- Standardizes procurement and specification of drawing dies for wire, bar and tube production.
- Helps die manufacturers, tool designers and drawing‑shop engineers select correct pellet, case and bearing/bore dimensions.
- Facilitates interchangeability and clear communication between suppliers and users on multi‑draw benches, push/pull drawing methods, and mandrel usage.
- Useful for quality control, tooling documentation, and international trade/specification of metal drawing tooling.
Who uses this standard
- Die and tooling manufacturers
- Metal‑drawing workshops and cold‑drawing shops
- Tooling procurement and quality assurance teams
- Standards committees and national standards bodies
Related standards
- ISO 2804 (referenced) - dimensions for hard‑metal rough pellets intended for dies.
- National standards may supplement ISO 1684 where details are not specified.