Overview
ISO 9182-4:2023 - "Tools for pressing - Guide pillars - Part 4: Type C, pillars with taper lead and bush" - is the fourth edition international standard that defines the geometry, tolerances, material guidance, hardness and designation of guide pillars (type C) with a taper lead and matching bush for use in press tools. It replaces the 2020 edition and consolidates dimensional tables, mounting details and options (with/without thread) needed for consistent manufacture and interchangeability of press-tool guide components.
Key topics and technical requirements
- Dimensions and tolerances: Detailed dimensional drawings (Figures 1–3) and a standardized matrix (Table 1) specify pillar diameters, bush dimensions and mounting clearances. Tolerance classes and limit deviations are referenced to ISO 286-2.
- Taper and mounting: The standard covers the taper lead geometry for the pillar and matching bush, including recommended taper angle (example recommended value 8°34′40″) and notes on mounting (bush to be mounted in a hole toleranced H5 where applicable).
- Surface finish: Surface roughness values for critical surfaces are defined in the figures and tables; an option with or without thread affects finish and mounting details.
- Material and hardness: Material selection is left to manufacturers’ discretion, but the clause on hardness references Rockwell C (see ISO 6508‑1) and gives the required hardness for compliant pillars.
- Designation format: A clear designation scheme is specified (standard reference, type, pillar diameter, bush length, pillar length and option A/B for thread). An example is provided in the standard for a pillar 20 mm diameter, bush length 32 mm, pillar length 200 mm, option B (with thread).
- Normative references: Normative cross-references include ISO 6753-1, ISO 286-2, ISO 6411 and ISO 6508-1 for related tolerancing, centre-hole representation and hardness testing.
Applications and users
- Who uses it: Toolmakers, die designers, press-tool manufacturers, component suppliers and quality engineers involved in metal stamping, forming and moulding die sets.
- Practical use cases:
- Ensuring interchangeability of guide pillars and bushes across different die sets.
- Specifying components in procurement documents and part catalogs.
- Designing assemblies that require controlled alignment, repeatability and wear resistance in press operations.
- Establishing inspection criteria for surface finish, fit and hardness during incoming or in-process quality control.
Related standards
Keywords: ISO 9182-4:2023, guide pillars, type C, taper lead, bush, press tools, dimensions and tolerances, hardness, designation.
Open preview (PDF)Tools for pressing — Guide pillars — Part 4: Type C, pillars with taper lead and bush