Methods for correcting slow roll

1. A method comprising a plurality of activities comprising:

for a shaft of an electric motor, the shaft comprising a slow roll sensing area, responsive to a first determined slow roll value, measured at the slow roll sensing area, exceeding a predetermined threshold:

determining a first electrical runout value for the slow roll sensing area from the first determined slow roll value;

rotating the shaft at a speed of less than 25 revolutions per minute;

heating the slow roll sensing area of the shaft to a temperature approximately within a predetermined temperature range for approximately a predetermined time interval, said heating sufficient to reduce the electrical runout value; and

applying a liquid coolant to a non-sensing area of the shaft to resist a thermal distortion of the non-sensing area.

2. The method of claim 1 , further comprising:

determining the slow roll sensing area of the shaft.

3. The method of claim 1 , further comprising:

measuring a second determined slow roll value after said heating activity.

4. The method of claim 1 , further comprising:

measuring a second determined slow roll value after said heating activity; and

determining a second electrical runout value for the slow roll sensing area from the second determined slow roll value.

5. The method of claim 1 , further comprising:

measuring the first determined slow roll value at the slow roll sensing area of the shaft.

6. The method of claim 1 , further comprising:

reducing the electrical runout value in the slow roll sensing area.

7. The method of claim 1 , further comprising:

heating the slow roll sensing area utilizing electric heat.

8. The method of claim 1 , further comprising:

heating the slow roll sensing area utilizing a carbonizing flame.

9. The method of claim 1 , further comprising:

heating the slow roll sensing area utilizing a carbonizing flame placed between approximately one inch and approximately two inches away from the slow roll sensing area of the shaft.

10. The method of claim 1 , further comprising:

grinding the shaft subsequent to said heating activity.

11. The method of claim 1 , further comprising:

machining the shaft subsequent to said heating activity.

12. The method of claim 1 , further comprising:

monitoring a temperature of the slow roll sensing area via an infrared temperature scanner.

13. The method of claim 1 , wherein the predetermined temperature range is between approximately 600 deg. F. and approximately 800 deg. F.

14. The method of claim 1 , wherein the predetermined time interval is between approximately six minutes and approximately eight minutes.

15. The method of claim 1 , further comprising:

subsequently determining that a second slow roll value at the slow roll sensing area of the shaft is below the predetermined threshold.

16. The method of claim 1 , further comprising:

flooding a bearing journal area of the shaft with a liquid coolant during said heating activity.

17. The method of claim 1 , further comprising:

cooling the shaft in air.

18. The method of claim 1 , further comprising:

cooling the shaft to a temperature below approximately 100 deg. F.

19. A method comprising:

for a shaft comprising a runout sensing area:

determining an electrical runout value for the runout sensing area;

rotating the shaft;

heating the runout sensing area of the shaft to a temperature approximately within a predetermined temperature range for approximately a predetermined time interval, said heating sufficient to reduce the electrical runout value; and

applying a liquid coolant to a non-sensing area of the shaft.