What is ISO 3875 about?
ISO 3875 specifies, with reference to ISO 230-1 and ISO 230-2, geometric tests, machining tests
and tests for accuracy and repeatability of positioning axes on general purpose and normal accuracy manually and numerically controlled (NC) external cylindrical centreless grinding machines. It also specifies the applicable tolerances corresponding to the above-mentioned tests.
ISO 3875 deals only with the verification of accuracy of the machine. It does not apply to the testing of the machine operation (vibrations, abnormal noise, stick-slip motion of components, etc.) nor to machine characteristics (such as speeds, feeds, etc.), which are generally checked before testing of machine accuracy.
ISO 3875 provides the terminology used for the principal components of the machine and the designation of the axes with reference to ISO 841.
ISO 3875 helps you improve the accuracy of external cylindrical centreless grinding machines.
Who is ISO 3875 for?
ISO 3875 on test conditions for external cylindrical centreless grinding machines — testing of the accuracy is useful for:
- External cylindrical centreless grinding machines designers
- External cylindrical centreless grinding machines manufacturers
Why should you use ISO 3875?
ISO 3875 standardizes methods of testing the accuracy of general-purpose and normal accuracy external cylindrical centreless grinding machines. The primary function of such machines is to provide cylindrical workpieces.
ISO 3875 specifies the tests that help you verify the geometric accuracy of the machine to achieve this primary function.
ISO 3875 provides you the guidance on tests to be performed, minimum tolerance, software compensation, machining tests, and geometric tests.
What’s changed since the last update?
ISO 3875 is the fourth edition that cancels and replaces the third edition (ISO 3875:2004), which has been technically revised.
The main changes compared to the previous edition are as follows:
- The machine sizes (thickness of grinding wheel) covered have been extended more than 300 mm from ISO 3875:2004 for test M1 since machine size in the industry increased
- Machine configurations have been classified into three types to cover major configurations in the markets
- References to ISO 230-1 and ISO 230-2 have been revised
- A new machine test for Z-directional grinding wheel slide (straightness and positioning) has been introduced
