Abstract: An electro-magnet or chuck for lifting scrap metallic particles, comprising a housing essentially of magnetic material. Enclosed are a plurality of spirally wound, superposed coils. Each coil has a central portion which is wound as a bimetal, that is, one winding having magnetic properties, such as an iron winding, and the other, non-magnetic, such as an aluminum winding in series with an outer winding portion of non-magnetic turns. The housing has an annular bottom portion of durable non-magnetic material, such as stainless steel, which is magnetically bridged by scrap magnetic particles being lifted.