Method and tool for use with compressors

A tool for drilling, tapping, and back spot facing at least one hole in a dynamoelectric machine, the tool comprising:

• a servo motor cutting device, the servo motor cutting device configured for use with a cutting tool;
• a drill unit skid, the drill unit skid adapted to engage a hook fit slot in a case of the dynamoelectric machine and for supporting the servo motor cutting device, the drill unit skid including hook fit slides, the hook fit slides configured to guide the drill unit skid along the hook fit slot and act as a stop in a radial direction;
• a laser positioning device, the laser positioning device configured to detect the position of the cutting tool;
• wherein the servo motor cutting device rotates the cutting tool to create the at least one hole, and wherein a rotor of the dynamoelectric machine is left in place during drilling, tapping and back spot facing.

A tool for drilling, tapping, and back spot facing at least one hole in a dynamoelectric machine, the tool comprising:

• a servo motor cutting device, the servo motor cutting device configured for use with a cutting tool;
• a drill unit skid, the drill unit skid adapted to engage a hook fit slot in a case of the dynamoelectric machine and for supporting the servo motor cutting device, the drill unit skid including hook fit slides, the hook fit slides configured to guide the drill unit skid along the hook fit slot and act as a stop in a radial direction;
• a micro switch configured to stop the servo motor cutting device when the micro switch activates;
• wherein the servo motor cutting device rotates the cutting tool to create the at least one hole, and wherein a rotor of the dynamoelectric machine is left in place during drilling, tapping and back spot facing.

A method for drilling, tapping, and spot facing a hole in a dynamoelectric machine, the method comprising the steps of:

• installing a mounting fixture on a lower casing half of the dynamoelectric machine;
• inserting a tool into a hook fit slot in the lower casing half of the dynamoelectric machine;
• actuating a shot pin to locate the tool circumferentially with respect to the lower casing half;
• actuating a clamp, the clamp configured to secure the tool to the hook fit slot;
• drilling the hole with the tool;
• spot facing the hole with the tool;
• tapping the hole with the tool;
• wherein all the above steps are performed while a rotor of the dynamoelectric machine is left in place.