Overview
ISO 10073:2008 defines the standardized specification for support pillars used in pressure die-cast dies and in plastics and rubber moulds. The standard specifies dimensions and tolerances (in millimetres), addresses materials and hardness, and prescribes the format for designation of compliant support pillars. It includes figures and tabulated sizes for Type A and Type B pillars and refers to surface texture indication in accordance with ISO 1302:2002.
The document is intended to promote interchangeability and consistent performance of support pillars across toolmaking and moulding operations.
Key Topics
- Dimensions and tolerances: Detailed in the standard's figures and tables for Type A and Type B support pillars; dimensions are specified in millimetres.
- Types: Two principal types (A and B) are provided with corresponding dimensional tables and assembly guidance.
- Surface texture: Surface roughness values and indication updated per ISO 1302:2002.
- Material and hardness: Material is specified as low carbon steel; choice of specific steel grade and hardness is left to the manufacturer's discretion.
- Designation: A clear designation format is defined (reference to ISO 10073, type, exterior diameter D and length l). Example from the standard: Support pillar ISO 10073 - A - 25 × 40.
- Assembly note: Spacer blocks and support pillars shall be ground to the same height when assembled in completed moulds.
Applications
ISO 10073:2008 is applicable to a range of tooling and moulding contexts, including:
- Pressure die-casting dies where accurate support and spacing between die halves are required.
- Plastics moulds and rubber moulds used in injection and compression moulding.
Practical benefits for manufacturers and toolmakers:
- Interchangeability: Standardized dimensions and designation reduce custom machining and simplify spare-part procurement.
- Quality control: Defined tolerances and surface texture references support repeatable assembly and reduce wear or misalignment.
- Procurement clarity: The designation format provides an unambiguous ordering reference for suppliers and toolrooms.
Implementation tips:
- Check the appropriate table and figure in ISO 10073 to select Type A or B and the correct D and l values.
- Confirm material choice and targeted hardness with the pillar manufacturer, as these are not strictly prescribed.
- Apply surface texture specification per ISO 1302 when documenting finished surfaces.
Related Standards
- ISO 273 - Clearance holes for bolts and screws (referenced for hole series).
- ISO 1302:2002 - Indication of surface texture in technical product documentation.
Using ISO 10073:2008 in tooling documentation helps standardize support pillar selection and supports reliable mould assembly, maintenance and spare-part replacement across die-casting and plastics/rubber moulding operations.