Technological Innovation

What is BS EN ISO 10791-1:2015?

BS EN ISO 10791-1:2015 is a technical standard that specifies the requirements for the testing and evaluation of the performance of machining centers. It focuses on the determination of geometric accuracy and positioning accuracy in order to ensure high precision and reliability in machining operations. This article aims to provide an in-depth understanding of the standard and its significance in the machining industry.

The Importance of Geometric Accuracy

Geometric accuracy refers to the degree of conformity between the actual dimensions of machine tool components and their expected values. It plays a crucial role in ensuring the quality and precision of machined parts. The BS EN ISO 10791-1:2015 standard provides guidelines and procedures for evaluating various geometric parameters such as straightness, flatness, parallelism, and perpendicularity. By adhering to these specifications, manufacturers can minimize errors caused by deviations from ideal geometries, resulting in improved product quality and reduced scrap rates.

Positioning Accuracy and its Impact

Positioning accuracy relates to the ability of a machining center to precisely position its tool or workpiece at a specified location. Any inaccuracies in positioning can lead to defective products and increased production costs. BS EN ISO 10791-1:2015 defines methods for assessing positioning accuracy under different operational conditions, including static, quasi-static, and dynamic measurements. Compliance with these standards ensures consistent and reliable machining results, reducing rework and improving overall productivity.

The Evaluation Process

The evaluation process outlined in BS EN ISO 10791-1:2015 involves a series of measurements and assessments. It requires specialized equipment capable of accurately measuring the geometric and positioning parameters specified in the standard. The standard provides detailed instructions on sample selection, measurement procedures, and reporting requirements to ensure consistency and comparability of results. Manufacturers are encouraged to regularly perform these evaluations and address any deviations from the recommended tolerances to maintain optimal machine performance.


BS EN ISO 10791-1:2015 is a technical standard that plays a critical role in guaranteeing the quality and precision of machining operations. It enables manufacturers to evaluate the geometric and positioning accuracy of their machining centers, consequently improving product quality, reducing scrap rates, and enhancing overall productivity. By adhering to this standard, companies can gain a competitive edge in the highly demanding machining industry.


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