[en] The problem of the high level dimensional to be obtained for the construction of these coils is a fundamentally important element in terms of the correct functioning of the whole magnet. In order to achieve this objective specific methodologies and tools for production and control were studied and applied to have the desired results with completely satisfactory results. With machining practically finished one can now synthesize the experience gained describing the more important results and the methods used, showing: the importance of the precision required in relation to operational functioning; the manufacturing solutions adopted and the operative measuring modalities; and the values and the deviations obtained