ISO 9182-4:2023

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

• ISO 9182 series (Part 1 - Types)
• ISO 6753-1 (machined plates for press tools)
• ISO 286-2 (tolerances)
• ISO 6411 (centre-hole representation)
• ISO 6508-1 (Rockwell hardness test)

Keywords: ISO 9182-4:2023, guide pillars, type C, taper lead, bush, press tools, dimensions and tolerances, hardness, designation.