ISO 3875-2020 PDF

Full title and description

Machine tools — Test conditions for external cylindrical centreless grinding machines — Testing of the accuracy. This International Standard specifies test conditions, test methods and permissible tolerances for verifying the accuracy of general-purpose and normal-accuracy manually and numerically controlled external cylindrical centreless grinding machines.

Abstract

The standard defines geometric tests, machining tests and tests for the accuracy and repeatability of positioning axes for external cylindrical centreless grinding machines, with reference to ISO 230-series test methods and ISO 841 axis designations. It covers terminology for principal components and the designation of axes, and specifies applicable tolerances; it does not cover running characteristics such as vibration, abnormal noise or machine performance parameters (speeds, feeds) which are normally checked prior to accuracy testing.

General information

• Status: Published (confirmed current following periodic review).
• Publication date: 29 January 2020.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.080.50 — Grinding and polishing machines.
• Edition / version: Edition 4 (2020).
• Number of pages: 20 pages.

Key bibliographic and life‑cycle details as published by ISO.

Scope

Specifies test conditions and methods for verifying accuracy of external cylindrical centreless grinding machines (both manual and NC) for general-purpose and normal-accuracy classes. The standard gives specific geometric and machining tests and associated tolerances; it is intended only for verification of machine accuracy (not for operational checks such as vibration, abnormal noise or performance characteristics like spindle speeds and feeds). The standard cross-references ISO 230 test methods and ISO 841 for axis designation.

Key topics and requirements

• Definitions and terminology for principal machine components and axis designation (references ISO 841).
• Geometric accuracy tests (straightness, flatness, perpendicularity and related checks tailored to centreless grinding machines).
• Machining tests to evaluate accuracy under cutting conditions and to determine permissible deviations.
• Tests for accuracy and repeatability of positioning axes (including measurement procedures and acceptance tolerances).
• Reference to ISO 230-series methods for test set-up, measurement and calculation of results.
• Explicit exclusion of running‑condition checks (vibration, abnormal noise, stick‑slip) and machine characteristic measurements (speeds, feeds) from the accuracy verification scope.

Typical use and users

Used by machine-tool manufacturers, quality and test laboratories, OEM acceptance/test engineers, machine-shop managers, procurement specialists evaluating new grinding machines, certification and compliance bodies, and standards committees involved with machine-tool testing. Typical applications include factory acceptance testing, end‑of‑line QA checks, comparative testing between machine models, and verification after maintenance or refurbishment.

Related standards

References and normative cross-references include ISO 230-1 and ISO 230-2 (general test codes for machine tools), ISO 230-7 (may be referenced for specific testing methods), and ISO 841 (designation of axes). ISO 3875 has earlier editions (2004 and prior) that were withdrawn and replaced by the 2020 edition.

Keywords

centreless grinding, external cylindrical grinding, machine tools, accuracy testing, geometric tests, machining tests, positioning repeatability, ISO 3875:2020, ISO 230, ISO 841.

FAQ

Q: What is this standard?

A: ISO 3875:2020 is an International Standard that specifies test conditions and methods for verifying the accuracy of external cylindrical centreless grinding machines (general‑purpose and normal‑accuracy, manual and NC machines).

Q: What does it cover?

A: It covers geometric and machining tests, accuracy and repeatability tests for positioning axes, terminology for principal components and axis designation, and the tolerances applicable to those tests. It does not cover machine running characteristics such as vibration or performance parameters like speeds and feeds.

Q: Who typically uses it?

A: Machine-tool manufacturers, acceptance and quality test labs, maintenance and repair teams, machine-shop managers, and purchasers or inspectors performing factory acceptance testing or post‑repair verification.

Q: Is it current or superseded?

A: The 2020 edition (Edition 4) is the current published version and was reviewed and confirmed during the ISO review cycle (confirmed in 2025), so it remains current. Previous editions (2004 and earlier) were withdrawn when the 2020 edition was published.

Q: Is it part of a series?

A: It is part of the body of ISO machine‑tool test standards (work under ISO/TC 39/SC 2) and cross‑references other ISO machine‑tool test standards, notably the ISO 230 series and ISO 841 for axis designation.

Q: What are the key keywords?

A: Centreless grinding, external cylindrical grinding, accuracy testing, geometric tests, machining tests, positioning repeatability, ISO 3875.