ISO 2769:1973

Overview

ISO 2769:1973 is an international standard developed by the International Organization for Standardization (ISO) that specifies the dimensions and interchangeability requirements for wing bases used in slide units of machine tools constructed from modular units. This standard ensures consistent sizing and compatibility of wing bases in special machines, facilitating efficient assembly, maintenance, and replacement across various industrial applications.

Adopted in 1973, ISO 2769 provides precise nominal sizes and designations for wing bases, enhancing modular construction and supporting streamlined manufacturing processes in the machine tool industry.

Key Topics

• Scope and Purpose
  Defines critical dimensions related to wing bases to ensure full interchangeability for slide units in modular machine tool assemblies. Primarily focused on special machines made with modular units.

• Nominal Sizes and Designations
  The standard outlines six nominal width sizes of the saddle on the associated slide unit:

  • 250 mm
  • 320 mm
  • 400 mm
  • 500 mm
  • 630 mm
  • 800 mm

  These nominal widths provide an easy designation system for identifying wing bases.

• Dimensional Specifications
  Provides detailed measurements for overall length, seating width, bolt hole centers, flange width, and clearance holes, all in millimeters.

  • Ensures uniformity with dowel hole placement, seating fit, and bolt thread sizes (M20 and M24 depending on size).
  • Key dimensions include max/min tolerances to facilitate precise manufacturing and assembly.

• Interchangeability
  Enables standardization to allow parts from different manufacturers or batches to be combined without custom fitting, reducing downtime and production costs.

Applications

• Modular Machine Tool Construction
  ISO 2769 wing bases are widely used in the design and construction of special-purpose machines built from modular units, promoting versatility and scalability.

• Maintenance and Replacement
  Standardized wing bases ensure that replacement parts fit perfectly, streamlining maintenance workflows and minimizing operational disruptions.

• Manufacturing Efficiency
  Adhering to ISO 2769 allows manufacturers to design machine tools with modular components that can be easily interchanged, supporting flexible production lines and reducing inventory diversity.

• Global Compatibility
  By aligning wing base dimensions internationally, this standard supports global supply chains and collaboration across countries and industries.

Related Standards

• ISO 1328 – Covers test conditions and specifications for machine tool slide units, complementing ISO 2769’s focus on wing base dimensions.

• ISO 10303 – Standard for product data representation useful for modeling modular machine tool components.

• ISO 4401 – Addresses mounting dimensions for hydraulic valves, often used in conjunction with modular machine tools.

Summary

ISO 2769:1973 plays a pivotal role in the standardization of wing bases for slide units in modular machine tool construction. By defining exact nominal sizes and detailed dimensional requirements, it ensures interchangeability and compatibility across manufacturers and applications. This standard supports improved manufacturing efficiency, simplified maintenance, and global collaboration in machine tool engineering.

Keywords: ISO 2769, wing bases, slide units, machine tool construction, modular units, interchangeability, nominal size, dimensions, machine tools standard, modular machine tools, industrial standards.