6.0 Field Windings Motors shall have a stabilized shunt or straight shunt field. Interpoles will be integral to the frame lamination to insure consistent design. Nomex insulation must be placed between field coils and frame. Entire frame assembly, with field coils and intercoils intact, shall receive multiple varnish dips and cures. Armature The armature shall be hand wound and connected.
Skewed armatures are preferred.
Commutator s shall be individually spin tested in the motor factory to ensure mechanical integrity. Each arm shall be given a minimum of two cycles of varnish and cure. Conductors shall be soldered to commutator Taping shall leave no exposed conductors on coil head or commutator end. The brush rigging assembly shall have radial brush holders to insure constant brush pressure. The assembly shall provide 90 rotation on rocker for access to all brushes.