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www.ferrometal.fi2. Tolerances
Product’s dimensions are impossible to manufacture exactly right. Although products used in different machines and applications have to be accurate enough to fullfill three
main requirements:
•
products have to function as required
•
products have to be compatible so that machine or application can be assembled
•
products have to be replaceable for example maintenance work done later on
These requirements are met by using acceptable variation in dimensions in manufacturing, known also as tolerances.
Main dimensional and geometrical tolerances for fasteners are shown in the following table: