What I had in mind was a block of hardwood, drill a hole with a forstner bit close to the diameter of the armature, cut the block in two, place one half each side of the armature and clamp into the vice. If you don't have a suitable forstner bit use a jig, scroll or band saw and if you don't have any of these, don't worry, drill a series of holes close together then knock out the centre with a sharp chisel. There is always a way Zillah.
Nothing but heaven itself is better than a friend who is really a friend. - Plautus