Overview
ISO 236-2:2013 specifies the dimensional requirements for long fluted machine reamers fitted with Morse taper shanks. This second edition modernizes the original 1976 publication by removing imperial units and adding informative linkage to cutting-tool data representation standards. The document sets out the required figure, two tables of dimensional data and an informative annex that maps ISO 236-2 symbols to ISO 13399 nomenclature.
Key Topics
- Scope and Purpose: Defines dimensions for long fluted machine reamers with Morse taper shanks to ensure consistent manufacture and interchangeability.
- Normative Reference: ISO 296 (Self-holding tapers for tool shanks) is normatively referenced and is indispensable for correct application of the taper specifications.
- Dimensional Data: The standard includes a figure for the reamer geometry and two tables:
- Table 1: Diameters and corresponding reamer and shank dimensions.
- Table 2: Dimensions set out as a function of diameter steps (diameter ranges linked to standard lengths and Morse taper sizes).
- Annex A (Informative): Provides the relationship between symbols used in ISO 236-2 and the symbol scheme of ISO 13399 (cutting tool data representation and exchange) to aid data exchange and digital tooling records.
Applications
ISO 236-2:2013 is intended for professionals involved in the design, manufacture, procurement and application of reamers in metalworking and precision engineering. Typical uses include:
- Tool manufacturers specifying long fluted machine reamers with Morse taper shanks for production.
- Machine shops selecting reamers that must mate accurately with machine-tool spindles and holders.
- Purchasing and inventory systems ensuring interchangeability across suppliers and countries.
- CAD/CAM and tooling-data systems integrating dimensional attributes via the ISO 13399 mapping for digital tool management.
Benefits:
- Interchangeability across manufacturers and equipment.
- Accurate fitting to machine spindles and holders via standardized Morse taper specification.
- Consistency in tooling selection, inventory and maintenance.
Related Standards
- ISO 236-1 - Part 1: Hand reamers (related family member covering hand tools).
- ISO 296 - Machine tools - Self-holding tapers for tool shanks (normative reference for Morse tapers).
- ISO 13399 (all parts) - Cutting tool data representation and exchange (annex mapping supports digital integration).
By following ISO 236-2:2013, manufacturers and end users of long fluted machine reamers achieve standardized dimensions, improved compatibility and smoother tooling data exchange, which together support efficient and reliable machining operations.
