Abstract: A stator coil pre-form assembly is comprised of coils held in compression between inner and outer sleeves. The sleeves are made of non-conductive, non-magnetic material which remain a permanent part of the completed structure after winding. Assembling the sleeves around the coils is accomplished by a winding core tool which is inserted through the center of the inner sleeve. The winding core tool has a dome-shaped head with coil-locating tabs at one end and a series of axially-extending pins around the circumference of the opposite end. Coil wires are wound around pairs of axially-opposing tabs and pins. The outer sleeve is then axially force-fitted over the coils. The tooling and preform permit the use of conventional, automated fly-winding equipment.