ISO 8636-2-2024 PDF

Full title and description

Machine tools — Test conditions for bridge-type milling machines — Part 2: Testing of the accuracy of travelling bridge (gantry-type) machines. This International Standard specifies geometric tests and tests to check the accuracy and repeatability of positioning of numerically controlled axes for general-purpose, normal-accuracy travelling-bridge (gantry-type) bridge milling machines, and the applicable tolerances for those tests.

Abstract

This part of ISO 8636 defines terminology for principal components and axis designation, and specifies geometric and positioning tests (with reference to the ISO 230 series) and their associated tolerances for bridge-type milling machines that have a travelling bridge and a fixed table. It applies to verification of machine accuracy (geometric and positioning) but does not cover operational characteristics such as vibration, speeds or feeds. The standard was published as Edition 3 in 2024.

General information

• Status: Published.
• Publication date: 4 September 2024.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.080.20 (Boring and milling machines).
• Edition / version: Edition 3 (2024).
• Number of pages: 48 pages.

Scope

Specifies geometric tests and tests for accuracy and repeatability of positioning of numerically controlled axes for general-purpose, normal-accuracy bridge-type milling machines with a travelling bridge (gantry) and fixed table. The document provides terminology and axis designation (with reference to ISO 841), defines applicable tolerances and test procedures (with reference to ISO 230 series), and excludes single-column (open-sided) machines and machines with fixed bridge and moving table; it is limited to accuracy verification and does not address operational tests such as vibration, abnormal noise or speeds/feeds checks.

Key topics and requirements

• Definitions and terminology for principal components of travelling-bridge (gantry) milling machines and axis designation (referencing ISO 841).
• Geometric tests to assess straightness, squareness, flatness and other geometric error motions relevant to gantry machines.
• Tests to determine accuracy and repeatability of positioning of numerically controlled linear and rotary axes (in line with ISO 230-2 test methods).
• Specification of applicable tolerances for the above tests for normal-accuracy, general-purpose machines.
• Test conditions, measurement procedures, and reporting conventions for machine acceptance, type testing and periodic verification (excluding operational characteristics like vibration and thermal effects).

Typical use and users

Used by machine tool manufacturers, quality and inspection laboratories, OEM commissioning teams, acceptance-test engineers, metrology/calibration specialists, procurement and acceptance personnel, and standards committees. Typical applications include factory acceptance testing, delivery/installation verification, periodic verification and comparative testing of gantry-type milling machines.

Related standards

Closely related documents include ISO 8636-1 (Part 1 — fixed-bridge/portal-type machines; existing edition from 2000 and under revision in the ISO work programme), and the ISO 230 test-code series referenced for geometric and positioning test methods (notably ISO 230-1, ISO 230-2 and ISO 230-7). Axis designation and coordinate nomenclature are referenced to ISO 841.

Keywords

bridge-type milling machines; gantry machines; travelling bridge; machine tool testing; geometric tests; positioning accuracy; repeatability; ISO 8636-2; ISO 230; ISO 841; acceptance test; machine verification.

FAQ

Q: What is this standard?

A: ISO 8636-2:2024 is an International Standard that specifies test conditions and procedures for assessing the geometric accuracy and positioning repeatability of travelling-bridge (gantry-type) bridge milling machines.

Q: What does it cover?

A: It covers geometric and positioning tests, applicable tolerances, terminology and axis designation for travelling-bridge milling machines with fixed tables. It does not cover operational tests (vibration, speeds/feeds) or machines with a fixed bridge and moving table or single-column open-sided machines.

Q: Who typically uses it?

A: Machine tool manufacturers, acceptance-test engineers, metrology and calibration labs, OEMs, procurement and QA teams, and regulatory/standards bodies involved in machine-tool conformity and verification.

Q: Is it current or superseded?

A: This edition (Edition 3) was published in 2024 and replaces the earlier ISO 8636-2:2007 version; it is the current published edition as of 4 September 2024.

Q: Is it part of a series?

A: Yes — ISO 8636 is a multi-part series for bridge-type milling machines (Part 1 addresses fixed-bridge/portal-type machines). ISO 8636-2 also references and uses methods from the ISO 230 machine-tool test-code series and axis nomenclature from ISO 841.

Q: What are the key keywords?

A: Gantry, travelling bridge, bridge-type milling machine, geometric tests, positioning accuracy, repeatability, ISO 8636-2, ISO 230, ISO 841, acceptance testing.