ISO 10791-3-1998 PDF

Full title and description

Test conditions for machining centres — Part 3: Geometric tests for machines with integral indexable or continuous universal heads (vertical Z‑axis). This International Standard specifies geometric verification tests for machining centres equipped with integral indexable or continuous universal heads and is intended to be used with reference to ISO 230‑1.

Abstract

This part of ISO 10791 defines geometric tests for machining centres (numerically controlled milling, boring, etc., where applicable) having essentially six NC axes (three linear X, Y, Z and three rotary related to head/table) and fitted with integral indexable or continuous universal heads. It describes test families and annex tests for three accessory universal head types (indexable 45° split heads, swivel heads with two orthogonal rotary axes, and continuous 45° split heads) and is limited to verification of geometric accuracy (not dynamic/operational performance).

General information

• Status: Published — International Standard (confirmed on review).
• Publication date: December 1998 (Edition 1).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.040.10 (Machining centres / machine tools).
• Edition / version: Edition 1 (1998); Technical Corrigendum ISO 10791‑3:1998/Cor 1:1999 issued.
• Number of pages: 48 (ISO edition; some national adoptions include additional national forewords and show slightly different page counts such as ~54–56 pages).

Scope

Specifies, with reference to ISO 230‑1, the geometric tests applicable to machining centres with integral indexable or continuous universal heads (vertical Z‑axis). The standard applies to machines with three NC linear axes (X, Y, Z up to certain lengths) and up to three rotary axes on head and/or table; movements beyond these (special features) are excluded. The document focuses on geometric verification (planes, axes, alignment, repositioning) and does not cover operational performance tests, which are addressed in other parts of ISO 10791.

Key topics and requirements

• Geometric test procedures for machining centres with integral indexable or continuous universal heads (vertical Z‑axis).
• Test families and specific tests for different head types: AG1–AG9 for 45° indexable heads, BG1–BG7 for swivel heads with two NC rotary axes, CG1–CG7 for continuous 45° split heads (annexes describe these tests).
• Reference to ISO 230‑1 for measurement methods and tolerancing principles; emphasis on repeatable geometric verification under no‑load/finishing conditions.
• Limits and procedures for checking axes straightness, squareness, runout and angular errors that contribute to spindle position accuracy.
• Does not include operational performance tests (feeds/speeds/interpolations, finished test pieces, time evaluations), which are covered by other parts of ISO 10791.

Typical use and users

Used by machine tool manufacturers, inspection and quality departments, test laboratories, OEMs and facility maintenance teams to verify the geometric accuracy and alignment of machining centres fitted with integral universal heads. It is applied during factory acceptance, installation checks, periodic verification and comparative benchmarking of machine geometry. Engineers and metrologists performing machine acceptance and calibration commonly use this standard.

Related standards

ISO 10791 is a multi‑part series. Relevant related parts include ISO 10791‑1 (geometric tests for horizontal spindle machines), ISO 10791‑2 (geometric tests for machines with vertical spindle or universal heads with vertical primary rotary axis), ISO 10791‑4 (accuracy and repeatability of positioning of axes), ISO 10791‑6 (accuracy of feeds, speeds and interpolations), ISO 10791‑7 (accuracy of finished test pieces), ISO 10791‑8/9/10 (contouring, operating times, thermal distortions) and other parts in the series. Users typically consult these related parts for kinematic, cutting and operational test coverage beyond the geometric tests of Part 3.

Keywords

Machining centre, geometric tests, universal head, indexable head, continuous head, CNC, spindle position, ISO 230‑1, machine tool testing, axes accuracy, runout, squareness, acceptance testing.

FAQ

Q: What is this standard?

A: ISO 10791‑3:1998 is the part of the ISO 10791 series that specifies geometric tests for machining centres fitted with integral indexable or continuous universal heads (vertical Z‑axis), intended for verification of machine geometry.

Q: What does it cover?

A: It covers procedures and tests (including annex test sets) to evaluate geometric elements that determine spindle position and orientation on machines with the described head types. It is limited to geometric verification (no operational feed/spindle/load testing).

Q: Who typically uses it?

A: Machine tool manufacturers, QA/metrology teams, inspection labs, OEMs, and maintenance/commissioning engineers who perform acceptance tests, installation checks and periodic geometric verifications of machining centres.

Q: Is it current or superseded?

A: The ISO bibliographic record shows ISO 10791‑3:1998 as published and (following periodic review) confirmed; a technical corrigendum was issued in 1999. According to ISO metadata the 1998 edition has been reviewed and confirmed (status checked during post‑publication reviews). Users should verify with their national standards body or ISO catalog for the latest confirmation/withdrawal status before relying on the standard for procurement or compliance.

Q: Is it part of a series?

A: Yes — ISO 10791 is a multi‑part series (Parts 1–10 and additional parts covering noise, vibration, etc.) dealing with test conditions for machining centres; Part 3 is the head‑specific geometric tests part. Consult the other parts for positioning, kinematic, finished test piece and operational evaluations.

Q: What are the key keywords?

A: Machining centre, geometric tests, universal head, indexable head, continuous head, spindle position, axes accuracy, ISO 230‑1, acceptance testing.