Abstract: A thread forming tool comprising a metal cylinder having a thread tap mounted in an open-sided chamber in the cylinder so that the longitudinal axis of one set of teeth on the tap is parallel with the longitudinal center axis of the cylinder and positioned so the teeth project radially outward from the cylindrical surface of the cylinder. A lock structure secures the tap against rotation relative to the cylinder, and driving structure on the cylinder is operable to rotate it around its longitudinal center axis as the tap teeth form threads on a bore through which the cylinder is driven. Different size threads can be cut with a given tap by sequentially positioning the tap at different angles of rotation relative to a center line through the centers of the tap and the cylinder.

Abstract: A method for protecting the stator windings of a dynamoelectric machine from metal fragments during machining operations that are performed on a housing portion of the dynamoelectric machine during its initial manufacture. The method is characterized by providing removable shields that are selectively positioned over the stator windings to isolate them from the areas of the housing being machined during the machining operation. The shields are effective to prevent any metal shavings, chips or other fragments developed during the machining operation from entering or otherwise contacting the stator windings. After the machining operations are completed, the shields are removed from their respective positions over the stator windings and further fabrication of the machine is then undertaken.