A study is presented to estimate the production effort of the magnetic structures for the undulatorsystems of the TESLA X-ray SASE FELs. The total magnetic length of the magnet structures is1405m. It is proposed to produce these huge quantity ‘turn key ready’ on an industrial scale. Thisimplies a resolute R&D effort. It should include the improvement and optimization of the materialquality of NdFeB material, the development of robustmagnetic measurement and fine tuningtechniques, which can be used in an industrial environment and an extended prototyping phase. Thesedevelopments are prerequisite for successful industrial production and are described in more detail. Anestimate is made for production capacities which are required to produce 1405m of magnetic structurewithin five years
