Overview
ISO 8977:2003 - Tools for pressing - Matrixes defines the basic dimensions and tolerances (in millimetres) for headless and headed matrixes (dies) with outside diameters from 5 mm to 50 mm. The standard gives examples of suitable material and hardness, specifies a standard designation format for compliant matrixes, and aligns matrix dimensions and tolerances to match punches specified in ISO 8020.
Key topics and technical requirements
- Scope and size range: External diameters D = 5 mm to 50 mm; types cover headless (A, C, E, AS, AR, AO) and headed (B, D, F, BS, BR, BO) matrixes and blanks.
- Dimensions and tolerances: Basic dimensions, point depths and overall lengths are specified in millimetres; tolerances on D and other features are included (e.g., option for h5 tolerance on request).
- Types and cutting shapes: Separate figures and tables for round cutting shapes, shaped (non-round) cutting shapes, and blanks; annex provides examples for square, rectangular and oblong profiles.
- Material and hardness (examples):
- Alloyed cold-work steel with 5 % to 12 % Cr: (60 ± 2) HRC
- High-speed steel: (62 ± 2) HRC
(Material choice is left to the manufacturer; these are illustrative hardness values.)
- Designation format: A standardized naming scheme is specified including: “Matrix”, the ISO reference (ISO 8977), matrix type (A, B, …), external diameter D with tolerance, point diameter d (if applicable), overall length L, working depth l and material.
Example:
Matrix ISO 8977 - A 10 h5 ×××× 4 ×××× 20 ×××× 4 - high speed steel
Applications and users
- Primary users: Toolmakers, press-tool designers, die manufacturers, quality engineers and procurement specialists specifying press tooling.
- Practical applications: Standardizes matrix components used in pressing operations - blanking, punching and other cutting/shaping press processes where interchangeability and fit to punches (per ISO 8020) are required.
- Benefits: Ensures dimensional compatibility between matrixes and punches, simplifies procurement/specification, supports consistent manufacturing tolerances and material/hardness recommendations.
Related standards
- ISO 8020:2002 - Tools for pressing - Punches with cylindrical head and straight or reduced shank (normative reference used to ensure matrix and punch compatibility).
- Prepared by ISO/TC 29 (Small tools), Subcommittee SC 8 (Tools for pressing and moulding).
Keywords: ISO 8977, matrixes, tools for pressing, press tooling, press dies, punches, ISO 8020, die dimensions, pressing standards.