ISO 10791-2-2023 PDF

Full title and description

ISO 10791-2:2023 — Test conditions for machining centres — Part 2: Geometric tests for machines with vertical spindle (vertical Z-axis). This international standard specifies geometric test methods and associated tolerances for numerically controlled machining centres having a vertical spindle configuration; it is intended for acceptance, verification and comparative testing of geometric accuracy.

Abstract

This document, with reference to the ISO 230 series, defines geometric tests for machining centres with vertical spindle (vertical Z-axis), establishes tolerances corresponding to general-purpose and normal-accuracy machines, and is applicable (totally or partially) to other numerically controlled machines whose configuration and movements are compatible with the described tests. The standard covers three linear axes (X, Y, Z) within specified travel limits, and includes supplementary tests for rotary and tilting movements in Annexes A, B and C.

General information

• Status: Published.
• Publication date: 21 April 2023 (April 2023).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.040.10 (Machining centres).
• Edition / version: Edition 2 (2023).
• Number of pages: 123 pages.

Scope

ISO 10791-2:2023 applies to machining centres with a vertical spindle (vertical Z-axis) having three numerically controlled linear axes (typical limits: X up to 5 000 mm, Y up to 2 000 mm, Z up to 2 000 mm) and to compatible supplementary movements (rotary, tilting, swivelling tables). It specifies geometric test procedures and associated tolerance classes for general-purpose and normal-accuracy machining centres, describes tests for several table configurations (clauses covering horizontal non-rotating tables and various rotating/tilting table arrangements), and provides additional tests for rotational axes of spindles, rotary tables and tilting cradles in annexes. The standard addresses only geometric verification, not dynamic or operational performance testing.

Key topics and requirements

• Geometric test methods referenced to the ISO 230 series (straightness, squareness, flatness, positional errors, angular errors).
• Defined tolerance limits for test results corresponding to general-purpose and normal-accuracy classes.
• Axis travel limits and configuration constraints for applicability (X ≤ 5 000 mm, Y ≤ 2 000 mm, Z ≤ 2 000 mm).
• Procedures for different table types and machine configurations (clauses 6–9 deal with fixed and various rotary/tilting tables).
• Annex tests (A, B, C) covering rotational axes of spindles, rotary tables and tilting cradles.
• Exclusion of operational performance tests (those are covered in other parts of the ISO 10791 series).

Typical use and users

Used by machine-tool manufacturers, quality and test laboratories, metrologists, OEM production engineers, acceptance-test teams, procurement and inspection departments to verify geometric accuracy at factory acceptance, installation, periodic verification and comparative benchmarking. Also referenced by standards committees and technical auditors when specifying acceptance criteria for vertical-spindle machining centres.

Related standards

ISO 10791 is a multipart series; related parts include ISO 10791-1 (geometric tests for horizontal spindle machines), ISO 10791-3 (universal heads), ISO 10791-4 through -10 (positioning accuracy, pallets, feeds/speeds/interpolations, finished test piece, contouring, operating times, thermal distortion, etc.). This 2023 edition replaces ISO 10791-2:2001 (withdrawn). The ISO 230 series (Test code for machine tools) is also a primary reference for test definitions and measurement fundamentals.

Keywords

machining centres, geometric tests, vertical spindle, CNC, test conditions, ISO 230, tolerances, positional accuracy, straightness, squareness, rotary tables, tilting tables, acceptance testing.

FAQ

Q: What is this standard?

A: ISO 10791-2:2023 is an international standard that specifies geometric test methods and tolerance criteria for machining centres with a vertical spindle (vertical Z-axis) used for verification and acceptance of geometric accuracy.

Q: What does it cover?

A: It covers geometric tests (straightness, flatness, perpendicularity, positional and angular errors, etc.), tolerance classes for general-purpose and normal-accuracy machines, applicability limits for axis travels, procedures for several table configurations, and additional tests for rotational/tilting axes in annexes. It does not cover machine operational performance tests.

Q: Who typically uses it?

A: Machine tool manufacturers, test laboratories, metrology specialists, production/quality engineers, procurement and inspection teams, and standards committees.

Q: Is it current or superseded?

A: Current — ISO 10791-2:2023 (Edition 2) is published and in force; it supersedes and replaces ISO 10791-2:2001 which has been withdrawn.

Q: Is it part of a series?

A: Yes — it is one part of the multipart ISO 10791 series (Test conditions for machining centres). It should be used in conjunction with other parts of ISO 10791 and with the ISO 230 series for full test-code context.

Q: What are the key keywords?

A: Vertical spindle, machining centre, geometric tests, CNC, tolerances, positional accuracy, ISO 230, rotary table, tilting table.