EUROLAB, with its state-of-the-art accredited laboratories and expert team, offers precise and rapid testing services within the scope of EN 20286-2 test. This standard gives limit deviation values for commonly used tolerance classes (zones) for holes and shafts calculated from the information provided. This section covers the values of the upper deviations ES (for holes) and es (for shafts) and the lower deviations EI (for holes) and (for shafts).
This ISO system is a standardized system for defining tolerances and fits between mating components, especially bores and shafts. The system helps ensure compatibility and interchangeability between mechanical parts.
The need for limits and fits for machined workpieces was mainly due to the inherent inaccuracy of manufacturing methods and the fact that "precision" of size was found unnecessary for most workpieces. To fulfill this function, it was found to be sufficient to produce a given workpiece in such a way that its size remains within two permissible limits, that is, a tolerance; This is the size variation that is acceptable in manufacturing.
Similarly, where a certain condition of fit is required between mating workpieces, it is necessary to attribute a positive or negative margin to the basic dimension, i.e. a "deviation", to achieve the required clearance or interference.
With developments in industry and international trade, it became necessary to develop formal systems of limitation and compliance, first at the industrial level, then at the national level, and then at the international level.
EUROLAB assists manufacturers with EN 20286-2 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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